How Visible Will The Stars Be Compared To A Normal Night Sky If I'm In The Path Of Totality? (Sun Completely

How visible will the stars be compared to a normal night sky if I'm in the path of totality? (Sun completely covered)

I’m not entirely sure, but you will be able to see some stars that you normally wouldn’t see. https://eclipse2017.nasa.gov/sites/default/files/publications/Eclipse_brochure-bookmark_508.pdf In fact, during the 1919 eclipse, Sir Arthur Eddington and others used our ability to see stars close to the Sun during the eclipse to help confirm Einstines’ theory of general relativity. https://eclipse2017.nasa.gov/testing-general-relativity

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8 years ago

Solar System: Things to Know This Week

Our social media accounts will help you explore our world, the solar system and beyond.

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1. The Flagship Fleet

Start with our flagship accounts, where you can keep up with all the latest news and be a part of the conversation.

Twitter: https://twitter.com/nasa

Facebook: https://www.facebook.com/NASA/

Instagram: https://www.instagram.com/nasa/

Tumblr: http://nasa.tumblr.com/

Pinterest: https://www.pinterest.com/nasa/

2. Your Galactic Neighborhood 

 Follow our Planetary Science Division to keep up with all the hardworking robots exploring the wild frontiers of our solar system.

Twitter: https://twitter.com/NASASolarSystem

Facebook: https://www.facebook.com/nasasolarsystem

Instagram: https://www.instagram.com/nasasolarsystem/

3. Mission Space

From the sun to Pluto and points in between, many NASA missions share their science on a variety of social platforms.

Twitter: https://www.nasa.gov/socialmedia#missions

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4. NASA’s History

Need some nostalgia in your feed? Learn the history of our exploration of our home planet, our solar system and beyond.

Twitter: https://twitter.com/NASAhistory

Facebook: https://www.facebook.com/NASAHistoryOffice

5. Kids in Space

Find fun stuff for kids, parents and anyone who likes space and Earth science, including games, hands-on projects and fun facts.

Twitter: https://twitter.com/nasaspaceplace

Facebook: https://www.facebook.com/nasaspaceplace

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6. The Big Picture

Our photographers take their cameras to some interesting places around the planet. 

Flickr: https://www.flickr.com/photos/nasahqphoto/

7. Star Watch

This is a great way to follow our missions that study the sun, Earth and space itself as elements of a interconnected system.

Twitter https://twitter.com/NASASunEarth

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8. NASA People

Want to know what it's like to work for us? Learn about the science and adventures of astronauts, scientists and engineers exploring space.

View the List: https://www.nasa.gov/socialmedia#people

9. NASA Earth

Our planet is changing, and NASA Earth is on it, using the vantage point of space to increase our understanding of Earth and improve lives.

Twitter: https://twitter.com/nasaearth

Facebook: https://www.facebook.com/nasaearth

10. Craving More?

Visit us at: https://www.nasa.gov/socialmedia

 for a listing of the agency’s current social media accounts. 

Discover more lists of 10 things to know about our solar system HERE.

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7 years ago

Craving some summer Sun? We're inviting people around the world to submit their names to be placed on a microchip that will travel to the Sun aboard Parker Solar Probe! 

Launching summer 2018, Parker Solar Probe will be our first mission to "touch" a star. The spacecraft - about the size of a small car - will travel right through the Sun's atmosphere, facing brutal temperatures and radiation as it traces how energy and heat move through the solar corona and explores what accelerates the solar wind and solar energetic particles.

Send your name along for the ride at go.nasa.gov/HotTicket! Submissions will be accepted through April 27, 2018. 

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.


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7 years ago

Solar System: Things To Know This Week

Weather permitting, you can observe the Moon most nights, unless it's a new moon, when the lighted side of the Moon faces away from Earth. The Moon is by far the brightest object in the night sky and there's plenty to see. But this week is special...

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...October 28 is International Observe the Moon Night (also known as InOMN).

Here's all you need to know to join in and celebrate:

1. One Planet. One Moon. One Night.

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Everyone on Earth is invited to join the celebration by hosting or attending an InOMN event and uniting on one day each year to look at and learn about the Moon together.

2. What's Up?

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October's night skies are full of sights, from the first quarter Moon on InOMN to Saturn making a cameo appearance above the Moon October 23 and 24. Watch our What's Up video for details.

3. Be Social

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Hundreds of events are planned around the globe. Click the top link on this page for a handy map. You can also register your own event.

4. Don't Just Stand There

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Here are some activities for enhanced Moon watching.

5. Impress Your Friends with Moon Knowledge

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Download InOMN flyers and handouts, Moon maps and even some pre-made presentations. There's even a certificate to mark your participation.

6. Guide to the Face of the Moon

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Almost dead center on the Earth-facing side of the Moon is the Surveyor 6 robotic spacecraft impact side. Apollo 12 and 14 are a bit to the left. And Apollo 11 - the first steps on the moon - are to the right. This retro graphic tells the whole story.

7. Moon Shots

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NASA photographers have done some exceptional work capturing views of the Moon from Earth. Here are a few galleries:

You can't have a solar eclipse without the Moon.

The 2016 "Supermoon" was pretty spectacular.

The Moon gets eclipsed, too.

That IS a Moon - AND the International Space Station.

The Moon is always a great photo subject.

Some spooky shots of the 2014 "Supermoon."

And 2013.

Tips from a NASA pro for photographing the Moon.

8. Walking on the Moon

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Twelve human beings walked on the face of the Moon. Here are some of the best shots from the Apollo program.

9. Moon Watch

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Our Lunar Reconnaissance Orbiter is up there right now, mapping the moon and capturing some spectacular high-resolution shots.

10. Keep Exploring

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Make our Moon portal your base for further lunar exploration.

Check out the full version of ‘Ten Things to Know This Week’ HERE.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.


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6 years ago

Human Research, Robotic Refueling, Crystallography and More Headed to Orbiting Lab

New science is headed to the International Space Station aboard the SpaceX Dragon.

Investigations on this flight include a test of robotic technology for refueling spacecraft, a project to map the world’s forests and two student studies inspired by Marvel’s “Guardians of the Galaxy” series.

Learn more about the science heading into low-Earth orbit:

The forest is strong with this one: GEDI studies Earth’s forests in 3D

The Global Ecosystem Dynamics Investigation (GEDI) is an instrument to measure and map Earth’s tropical and temperate forests in 3D.

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The Jedi knights may help protect a galaxy far, far away, but our GEDI will help us study and understand forest changes right here on Earth.

Robotic refueling in space

What’s cooler than cool? Cryogenic propellants, or ice-cold spacecraft fuel! Our Robotic Refueling Mission 3 (RRM3) will demonstrate technologies for storing and transferring these special liquids. By establishing ways to replenish this fuel supply in space, RRM3 could help spacecraft live longer and journey farther.

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The mission’s techniques could even be applied to potential lunar gas stations at the Moon, or refueling rockets departing from Mars.

Staying strong in space

The Molecular Muscle investigation examines the molecular causes of muscle abnormalities from spaceflight in C. elgans, a roundworm and model organism.

This study could give researchers a better understanding of why muscles deteriorate in microgravity so they can improve methods to help crew members maintain their strength in space.

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Investigation studies space-grown crystals for protection against radiation

Perfect Crystals is a study to learn more about an antioxidant protein called manganese superoxide dismutase that protects the body from the effects of radiation and some harmful chemicals.

The station’s microgravity environment allows researchers to grow more perfectly ordered crystals of the proteins. These crystals are brought back to Earth and studied in detail to learn more about how the manganese superoxide dismutase works. Understanding how this protein functions may aid researchers in developing techniques to reduce the threat of radiation exposure to astronauts as well as prevent and treat some kinds of cancers on Earth.

Satellite deployment reaching new heights with SlingShot

SlingShot is a new, cost-effective commercial satellite deployment system that will be tested for the first time.

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SlingShot hardware, two small CubeSats, and a hosted payload will be carried to the station inside SpaceX’s Dragon capsule and installed on a Cygnus spacecraft already docked to the orbiting laboratory. Later, Cygnus will depart station and fly to a pre-determined altitude to release the satellites and interact with the hosted payload.

Investigation studies accelerated aging in microgravity

Spaceflight appears to accelerate aging in both humans and mice. Rodent Research-8 (RR-8) is a study to understand the physiology of aging and the role it plays on the progression of disease in humans. This investigation could provide a better understanding of how aging changes the body, which may lead to new therapies for related conditions experienced by astronauts in space and people on Earth.

Guardians of the space station: Student contest flies to orbiting lab

The MARVEL ‘Guardians of the Galaxy’ Space Station Challenge is a joint project between the U.S. National Laboratory and Marvel Entertainment featuring two winning experiments from a contest for American teenage students. For the contest, students were asked to submit microgravity experiment concepts that related to the Rocket and Groot characters from Marvel’s “Guardians of the Galaxy” comic book series.

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Team Rocket: Staying Healthy in Space

If an astronaut suffers a broken tooth or lost filling in space, they need a reliable and easy way to fix it. This experiment investigates how well a dental glue activated by ultraviolet light would work in microgravity. Researchers will evaluate the use of the glue by treating simulated broken teeth and testing them aboard the station.

Team Groot: Aeroponic Farming in Microgravity

This experiment explores an alternative method for watering plants in the absence of gravity using a misting device to deliver water to the plant roots and an air pump to blow excess water away. Results from this experiment may enable humans to grow fruits and vegetables in microgravity, and eliminate a major obstacle for long-term spaceflight.

These investigation join hundreds of others currently happening aboard the station. For more info, follow @ISS_Research!

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com 


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1 year ago

as flight directors, you are in charge of a lot of the operations, but do you ever get to experience handling controls or zero gravity simulation? do you have to know every aspect of everyone's job?


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5 years ago

An Astronaut’s Tips For Living in Confined Spaces

One thing astronauts have to be good at: living in confined spaces for long periods of time. 

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Nearly 20 years successfully living on the International Space Station and more than 50 flying in space did not happen by accident. Our astronauts and psychologists have examined what human behaviors create a healthy culture for living and working remotely in small groups. They narrowed it to five general skills and defined the associated behaviors for each skill. 

For many of us in a similar scenario, here are the skills as shared by astronaut Anne McClain: 

Skill 1, Communication

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Share information and feelings freely. 

Talk about your intentions before taking action. 

Discuss when your or others’ actions were not as expected. 

Take time to debrief after success or conflict. 

Admit when you are wrong.

Skill 2, Self-Care

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Balance work, rest, and personal time. Be organized.

Realistically assess your own strengths and weaknesses, and their influence on the group.

Identify personal tendencies and their influence on your success or failure. Learn from mistakes. 

Be open about your weaknesses and feelings. 

Take action to mitigate your own stress or negativity (don't pass it on to the group). 

Skill 3, Team Care

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Demonstrate patience and respect. Encourage others. 

Monitor your team (or friends and family) for signs of stress or fatigue. 

Encourage participation in team (or virtual) activities. 

Volunteer for the unpleasant tasks. Offer and accept help. 

Share credit; take the blame.

Skill 4, Group Living

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Cooperate rather than compete. 

Actively cultivate group culture (use each individual's culture to build the whole). 

Respect roles, responsibilities and workload. 

Take accountability; give praise freely. Then work to ensure a positive team attitude. 

Keep calm in conflict.

Skill 5, Leadership/Followership

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Accept responsibility.

Adjust your style to your environment.

Assign tasks and set goals.

Lead by example. Give direction, information, feedback, coaching and encouragement.

Talk when something isn’t right. Ask questions.

We are all in this together on this spaceship we call Earth! These five skills are just reminders to help cultivate good mental and physical health while we all adjust to being indoors. Take care of yourself and dive deeper into these skills HERE. 

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.


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8 years ago

Solar System: Things to Know This Week

Reaching out into space yields benefits on Earth. Many of these have practical applications — but there's something more than that. Call it inspiration, perhaps, what photographer Ansel Adams referred to as nature's "endless prospect of magic and wonder." 

Our ongoing exploration of the solar system has yielded more than a few magical images. Why not keep some of them close by to inspire your own explorations? This week, we offer 10 planetary photos suitable for wallpapers on your desktop or phone. Find many more in our galleries. These images were the result of audacious expeditions into deep space; as author Edward Abbey said, "May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view."

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1. Martian Selfie

This self-portrait of NASA's Curiosity Mars rover shows the robotic geologist in the "Murray Buttes" area on lower Mount Sharp. Key features on the skyline of this panorama are the dark mesa called "M12" to the left of the rover's mast and pale, upper Mount Sharp to the right of the mast. The top of M12 stands about 23 feet (7 meters) above the base of the sloping piles of rocks just behind Curiosity. The scene combines approximately 60 images taken by the Mars Hand Lens Imager, or MAHLI, camera at the end of the rover's robotic arm. Most of the component images were taken on September 17, 2016.

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2. The Colors of Pluto

NASA's New Horizons spacecraft captured this high-resolution, enhanced color view of Pluto on July 14, 2015. The image combines blue, red and infrared images taken by the Ralph/Multispectral Visual Imaging Camera (MVIC). Pluto's surface sports a remarkable range of subtle colors, enhanced in this view to a rainbow of pale blues, yellows, oranges, and deep reds. Many landforms have their own distinct colors, telling a complex geological and climatological story that scientists have only just begun to decode.

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3. The Day the Earth Smiled

On July 19, 2013, in an event celebrated the world over, our Cassini spacecraft slipped into Saturn's shadow and turned to image the planet, seven of its moons, its inner rings — and, in the background, our home planet, Earth. This mosaic is special as it marks the third time our home planet was imaged from the outer solar system; the second time it was imaged by Cassini from Saturn's orbit, the first time ever that inhabitants of Earth were made aware in advance that their photo would be taken from such a great distance.

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4. Looking Back

Before leaving the Pluto system forever, New Horizons turned back to see Pluto backlit by the sun. The small world's haze layer shows its blue color in this picture. The high-altitude haze is thought to be similar in nature to that seen at Saturn's moon Titan. The source of both hazes likely involves sunlight-initiated chemical reactions of nitrogen and methane, leading to relatively small, soot-like particles called tholins. This image was generated by combining information from blue, red and near-infrared images to closely replicate the color a human eye would perceive.

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5. Catching Its Own Tail

A huge storm churning through the atmosphere in Saturn's northern hemisphere overtakes itself as it encircles the planet in this true-color view from Cassini. This picture, captured on February 25, 2011, was taken about 12 weeks after the storm began, and the clouds by this time had formed a tail that wrapped around the planet. The storm is a prodigious source of radio noise, which comes from lightning deep within the planet's atmosphere.

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6. The Great Red Spot

Another massive storm, this time on Jupiter, as seen in this dramatic close-up by Voyager 1 in 1979. The Great Red Spot is much larger than the entire Earth.

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7. More Stormy Weather

Jupiter is still just as stormy today, as seen in this recent view from NASA's Juno spacecraft, when it soared directly over Jupiter's south pole on February 2, 2017, from an altitude of about 62,800 miles (101,000 kilometers) above the cloud tops. From this unique vantage point we see the terminator (where day meets night) cutting across the Jovian south polar region's restless, marbled atmosphere with the south pole itself approximately in the center of that border. This image was processed by citizen scientist John Landino. This enhanced color version highlights the bright high clouds and numerous meandering oval storms.

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8. X-Ray Vision

X-rays stream off the sun in this image showing observations from by our Nuclear Spectroscopic Telescope Array, or NuSTAR, overlaid on a picture taken by our Solar Dynamics Observatory (SDO). The NuSTAR data, seen in green and blue, reveal solar high-energy emission. The high-energy X-rays come from gas heated to above 3 million degrees. The red channel represents ultraviolet light captured by SDO, and shows the presence of lower-temperature material in the solar atmosphere at 1 million degrees.

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9. One Space Robot Photographs Another

This image from NASA's Mars Reconnaissance Orbiter shows Victoria crater, near the equator of Mars. The crater is approximately half a mile (800 meters) in diameter. It has a distinctive scalloped shape to its rim, caused by erosion and downhill movement of crater wall material. Since January 2004, the Mars Exploration Rover Opportunity has been operating in the region where Victoria crater is found. Five days before this image was taken in October 2006, Opportunity arrived at the rim of the crater after a drive of more than over 5 miles (9 kilometers). The rover can be seen in this image, as a dot at roughly the "ten o'clock" position along the rim of the crater. (You can zoom in on the full-resolution version here.)

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10. Night Lights

Last, but far from least, is this remarkable new view of our home planet. Last week, we released new global maps of Earth at night, providing the clearest yet composite view of the patterns of human settlement across our planet. This composite image, one of three new full-hemisphere views, provides a view of the Americas at night from the NASA-NOAA Suomi-NPP satellite. The clouds and sun glint — added here for aesthetic effect — are derived from MODIS instrument land surface and cloud cover products.

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Americas at night

Discover more lists of 10 things to know about our solar system HERE.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com


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9 years ago

What’s Up for February 2016?

Five morning planets, Comet Catalina passes Polaris and icy Uranus and icy Vesta meet near Valentine’s Day.

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February mornings (until Feb. 20) feature Mercury, Venus, Saturn, Mars and Jupiter. The last time this five-planet dawn lineup happened was in 2005. The planets are easy to distinguish when you use the moon as your guide. Details on viewing HERE.

If you miss all five planets this month, you’ll be able to see them again in August’s sunset sky.

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Last month, Comet Catalina’s curved dust tail and straight ion tail were visible in binoculars and telescopes near two galaxies that are close to the handle of the Big Dipper. Early this month, the comet nears Polaris, the North Star. It should be visible all month long for northern hemisphere observers.

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There will be more opportunities to photograph Comet Catalina paired with other objects this month. It passes the faint spiral galaxy IC 342 and a pretty planetary nebula named NGC 1501 between Feb. 10 – 29. For binocular viewers, the magnitude 6 comet pairs up with a pretty string of stars, known as Kemble’s Cascade, on Feb. 24.

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Finally, through binoculars, you should be able to pick out Vesta and Uranus near one another this month. You can use the moon as a guide on Feb. 12, and the cornerstone and the corner stars of Pegasus all month long.

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For more information about What’s Up in the February sky, watch our monthly video HERE. 

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com


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6 years ago

In Conversation with the Sun: Parker Solar Probe Communications

Our Sun powers life on Earth. It defines our days, nourishes our crops and even fuels our electrical grids. In our pursuit of knowledge about the universe, we’ve learned so much about the Sun, but in many ways we’re still in conversation with it, curious about its mysteries.

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Parker Solar Probe will advance this conversation, flying through the Sun’s atmosphere as close as 3.8 million miles from our star’s surface, more than seven times closer to it than any previous spacecraft. If space were a football field, with Earth at one end and the Sun at the other, Parker would be at the four-yard line, just steps away from the Sun! This journey will revolutionize our understanding of the Sun, its surface and solar winds.

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Supporting Parker on its journey to the Sun are our communications networks. Three networks, the Near Earth Network, the Space Network and the Deep Space Network, provide our spacecraft with their communications, delivering their data to mission operations centers. Their services ensure that missions like Parker have communications support from launch through the mission.

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For Parker’s launch on Aug. 12, the Delta IV Heavy rocket that sent Parker skyward relied on the Space Network. A team at Goddard Space Flight Center’s Networks Integration Center monitored the launch, ensuring that we maintained tracking and communications data between the rocket and the ground. This data is vital, allowing engineers to make certain that Parker stays on the right path towards its orbit around the Sun.

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The Space Network’s constellation of Tracking and Data Relay Satellites (TDRS) enabled constant communications coverage for the rocket as Parker made its way out of Earth’s atmosphere. These satellites fly in geosynchronous orbit, circling Earth in step with its rotation, relaying data from spacecraft at lower altitudes to the ground. The network’s three collections of TDRS over the Atlantic, Pacific and Indian oceans provide enough coverage for continuous communications for satellites in low-Earth orbit.

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The Near Earth Network’s Launch Communications Segment tracked early stages of Parker's launch, testing our brand new ground stations’ ability to provide crucial information about the rocket’s initial velocity (speed) and trajectory (path). When fully operational, it will support launches from the Kennedy spaceport, including upcoming Orion missions. The Launch Communications Segment’s three ground stations are located at Kennedy Space Center; Ponce De Leon, Florida; and Bermuda. 

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When Parker separated from the Delta IV Heavy, the Deep Space Network took over. Antennas up to 230 feet in diameter at ground stations in California, Australia and Spain are supporting Parker for its 24 orbits around the Sun and the seven Venus flybys that gradually shrink its orbit, bringing it closer and closer to the Sun. The Deep Space Network is delivering data to mission operations centers and will continue to do so as long as Parker is operational.

Near the Sun, radio interference and the heat load on the spacecraft’s antenna makes communicating with Parker a challenge that we must plan for. Parker has three distinct communications phases, each corresponding to a different part of its orbit.

When Parker comes closest to the Sun, the spacecraft will emit a beacon tone that tells engineers on the ground about its health and status, but there will be very little opportunity to command the spacecraft and downlink data. High data rate transmission will only occur during a portion of Parker’s orbit, far from the Sun. The rest of the time, Parker will be in cruise mode, taking measurements and being commanded through a low data rate connection with Earth.

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Communications infrastructure is vital to any mission. As Parker journeys ever closer to the center of our solar system, each byte of downlinked data will provide new insight into our Sun. It’s a mission that continues a conversation between us and our star that has lasted many millions of years and will continue for many millions more.

For more information about NASA’s mission to touch the Sun: https://www.nasa.gov/content/goddard/parker-solar-probe

For more information about our satellite communications check out: http://nasa.gov/SCaN

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.


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4 years ago

Amazing Earth: Satellite Images from 2020

In the vastness of the universe, the life-bringing beauty of our home planet shines bright. During this tumultuous year, our satellites captured some pockets of peace, while documenting data and striking visuals of unprecedented natural disasters. As 2020 comes to a close, we’re diving into some of the devastation, wonders, and anomalies this year had to offer. 

NASA’s fleet of Earth-observing satellites and instruments on the International Space Station unravel the complexities of the blue marble from a cosmic vantage point. These robotic scientists orbit our globe constantly, monitoring and notating changes, providing crucial information to researchers here on the ground. 

Take a glance at 2020 through the lens of NASA satellites:

 A Delta Oasis in Southeastern Kazakhstan

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Seen from space, the icy Ili River Delta contrasts sharply with the beige expansive deserts of southeastern Kazakhstan.

When the Operational Land Imager (OLI) on Landsat 8 acquired this natural-color image on March 7, 2020, the delta was just starting to shake off the chill of winter. While many of the delta’s lakes and ponds were still frozen, the ice on Lake Balkhash was breaking up, revealing swirls of sediment and the shallow, sandy bed of the western part of the lake.

The expansive delta and estuary is an oasis for life year round. Hundreds of plant and animal species call it home, including dozens that are threatened or endangered. 

Fires and Smoke Engulf Southeastern Australia

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A record-setting and deadly fire season marred the beginning of the year in Australia. Residents of the southeastern part of the country told news media about daytime seeming to turn to night, as thick smoke filled the skies and intense fires drove people from their homes. 

This natural-color image of Southeastern Australia was acquired on January 4, 2020, by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite. The smoke has a tan color, while clouds are bright white. It is likely that some of the white patches above the smoke are pyrocumulonimbus clouds—clouds created by the convection and heat rising from a fire.

Nighttime Images Capture Change in China

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A team of scientists from NASA’s Goddard Space Flight Center (GSFC) and Universities Space Research Association (USRA) detected signs of the shutdown of business and transportation around Hubei province in central China. As reported by the U.S. State Department, Chinese authorities suspended air, road, and rail travel in the area and placed restrictions on other activities in late January 2020 in response to the COVID-19 outbreak in the region.

A research team analyzed images of Earth at night to decipher patterns of energy use, transportation, migration, and other economic and social activities. Data for the images were acquired with the Visible Infrared Imaging Radiometer Suite (VIIRS) on the NOAA–NASA Suomi NPP satellite (launched in 2011) and processed by GSFC and USRA scientists. VIIRS has a low-light sensor—the day/night band—that measures light emissions and reflections. This capability has made it possible to distinguish the intensity, types, and sources of lights and to observe how they change.

The Parched Paraná River

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Though a seemingly serene oasis from above, there is more to this scene than meets the eye. On July 3, 2020, the Operational Land Imager (OLI) on Landsat 8 captured this false-color image of the river near Rosario, a key port city in Argentina. The combination of shortwave infrared and visible light makes it easier to distinguish between land and water. A prolonged period of unusually warm weather and drought in southern Brazil, Paraguay, and northern Argentina dropped the Paraná River to its lowest water levels in decades. The parched river basin has hampered shipping and contributed to an increase in fire activity in the delta and floodplain.

The drought has affected the region since early 2020, and low water levels have grounded several ships, and many vessels have had to reduce their cargo in order to navigate the river. With Rosario serving as the distribution hub for much of Argentina’s soy and other farm exports, low water levels have caused hundreds of millions of dollars in losses for the grain sector, according to news reports.

Historic Fires Devastate the U.S. Pacific Coast

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Climate and fire scientists have long anticipated that fires in the U.S. West would grow larger, more intense, and more dangerous. But even the most experienced among them have been at a loss for words in describing the scope and intensity of the fires burning in West Coast states during September 2020.

Lightning initially triggered many of the fires, but it was unusual and extreme meteorological conditions that turned some of them into the worst conflagrations in the region in decades. 

Throughout the outbreak, sensors like the Visible Infrared Imaging Radiometer Suite (VIIRS) and the Ozone Mapping and Profiler Suite (OMPS) on the NOAA-NASA Suomi NPP satellite collected daily images showing expansive, thick plumes of aerosol particles blowing throughout the U.S. West on a scale that satellites and scientists rarely see. 

This image shows North America on September 9th, 2020, as a frontal boundary moved into the Great Basin and produced very high downslope winds along the mountains of Washington, Oregon, and California. The winds whipped up the fires, while a pyrocumulus cloud from the Bear fire in California injected smoke high into the atmosphere. The sum of these events was an extremely thick blanket of smoke along the West Coast.

The Sandy Great Bahama Bank

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Though the bright blues of island waters are appreciated by many from a sea-level view, their true beauty is revealed when photographed from space. The underwater masterpiece photographed above is composed of sand dunes off the coast of the Bahamas. 

The Great Bahama Bank was dry land during past ice ages, but it slowly submerged as sea levels rose. Today, the bank is covered by water, though it can be as shallow as two meters (seven feet) deep in places. The wave-shaped ripples in the image are sand on the seafloor. The curves follow the slopes of the dunes, which were likely shaped by a fairly strong current near the sea bottom. Sand and seagrass are present in different quantities and depths, giving the image it’s striking range of blues and greens.

This image was captured on February 15th, 2020, by Landsat 8, whose predecessor, Landsat 7, was the first land-use satellite to take images over coastal waters and the open ocean. Today, many satellites and research programs map and monitor coral reef systems, and marine scientists have a consistent way to observe where the reefs are and how they are faring. 

Painting Pennsylvania Hills

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Along with the plentiful harvest of crops in North America, one of the gifts of Autumn is the gorgeous palette of colors created by the chemical transition and fall of leaves from deciduous trees. 

The folded mountains of central Pennsylvania were past peak leaf-peeping season but still colorful when the Operational Land Imager (OLI) on the Landsat 8 satellite passed over on November 9, 2020. The natural-color image above shows the hilly region around State College, Pennsylvania overlaid on a digital elevation model to highlight the topography of the area.

The region of rolling hills and valleys is part of a geologic formation known as the Valley and Ridge Province that stretches from New York to Alabama. These prominent folds of rock were mostly raised up during several plate tectonic collisions and mountain-building episodes in the Ordovician Period and later in the creation of Pangea—when what is now North America was connected with Africa in a supercontinent. Those events created the long chain of the Appalachians, one of the oldest mountain ranges in the world. 

A Dangerous Storm in the Night

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Ominous and looming, a powerful storm hovered off the US coastline illuminated against the dark night hues. 

The Visible Infrared Imaging Radiometer Suite (VIIRS) on NOAA-20 acquired this image of Hurricane Laura at 2:20 a.m. Central Daylight Time on August 26, 2020. Clouds are shown in infrared using brightness temperature data, which is useful for distinguishing cooler cloud structures from the warmer surface below. That data is overlaid on composite imagery of city lights from NASA’s Black Marble dataset.

Hurricane Laura was among the ten strongest hurricanes to ever make landfall in the United States. Forecasters had warned of a potentially devastating storm surge up to 20 feet along the coast, and the channel might have funneled that water far inland. It did not. The outcome was also a testament to strong forecasting and communication by the National Hurricane Center and local emergency management authorities in preparing the public for the hazards.

A Windbreak Grid in Hokkaido

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From above, the Konsen Plateau in eastern Hokkaido offers a remarkable sight: a massive grid that spreads across the rural landscape like a checkerboard, visible even under a blanket of snow. Photographed by the Operational Land Imager (OLI) on Landsat 8, this man-made design is not only aesthetically pleasing, it’s also an agricultural insulator. 

The strips are forested windbreaks—180-meter (590-foot) wide rows of coniferous trees that help shelter grasslands and animals from Hokkaido’s sometimes harsh weather. In addition to blocking winds and blowing snow during frigid, foggy winters, they help prevent winds from scattering soil and manure during the warmer months in this major dairy farming region of Japan. 

Shadows from a Solar Eclipse

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Formidable, rare, and awe-inspiring — the first and only total solar eclipse of 2020 occurred on December 14, with the path of totality stretching from the equatorial Pacific to the South Atlantic and passing through southern Argentina and Chile as shown in the lower half of the image above. The Advanced Baseline Imager (ABI) on Geostationary Operational Environmental Satellite 16 (GOES-16) captured these images of the Moon’s shadow crossing the face of Earth. 

The “path of totality” (umbral path) for the eclipse was roughly 90 kilometers (60 miles) wide and passed across South America from Saavedra, Chile, to Salina del Eje, Argentina. While a total eclipse of the Sun occurs roughly every 18 months, seeing one from any particular location on Earth is rare. On average, a solar eclipse passes over the same parcel of land roughly every 375 years. The next total solar eclipse will occur on December 4, 2021 over Antarctica, and its next appearance over North America is projected for April 8, 2024.

For additional information and a look at more images like these visit NASA’s Earth Observatory.  

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.


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