Juno: Inside The Spacecraft

Juno: Inside the Spacecraft

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Our Juno spacecraft was carefully designed to meet the tough challenges in flying a mission to Jupiter: weak sunlight, extreme temperatures and deadly radiation. Lets take a closer look at Juno:

It Rotates!

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Roughly the size of an NBA basketball court, Juno is a spinning spacecraft. Cartwheeling through space makes the spacecraft’s pointing extremely stable and easy to control. While in orbit at Jupiter, the spinning spacecraft sweeps the fields of view of its instruments through space once for each rotation. At three rotations per minute, the instruments’ fields of view sweep across Jupiter about 400 times in the two hours it takes to fly from pole to pole.

It Uses the Power of the Sun

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Jupiter’s orbit is five times farther from the sun than Earth’s, so the giant planet receives 25 times less sunlight than Earth. Juno will be the first solar-powered spacecraft we've designed to operate at such a great distance from the sun. Because of this, the surface area of the solar panels required to generate adequate power is quite large.

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Three solar panels extend outward from Juno’s hexagonal body, giving the overall spacecraft a span of about 66 feet. Juno benefits from advances in solar cell design with modern cells that are 50% more efficient and radiation tolerant than silicon cells available for space missions 20 years ago. Luckily, the mission’s power needs are modest, with science instruments requiring full power for only about six out of each 11-day orbit.

It Has a Protective Radiation Vault

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Juno will avoid Jupiter’s highest radiation regions by approaching over the north, dropping to an altitude below the planet’s radiation belts, and then exiting over the south. To protect sensitive spacecraft electronics, Juno will carry the first radiation shielded electronics vault, a critical feature for enabling sustained exploration in such a heavy radiation environment.

Juno Science Payload:

Gravity Science and Magnetometers – Will study Jupiter’s deep structure by mapping the planet’s gravity field and magnetic field.

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Microwave Radiometer – Will probe Jupiter’s deep atmosphere and measure how much water (and hence oxygen) is there.

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JEDI, JADE and Waves – These instruments will work to sample electric fields, plasma waves and particles around Jupiter to determine how the magnetic field is connected to the atmosphere, and especially the auroras (northern and southern lights).

JADE and JEDI

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Waves

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UVS and JIRAM – Using ultraviolet and infrared cameras, these instruments will take images of the atmosphere and auroras, including chemical fingerprints of the gases present.

UVS

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JIRAM

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JunoCam – Take spectacular close-up, color images.

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Follow our Juno mission on the web, Facebook, Twitter, YouTube and Tumblr.

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

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Sending Science to Space (and back) 🔬🚀

This season on our NASA Explorers video series, we’ve been following Elaine Horn-Ranney Ph.D and Parastoo Khoshaklagh Ph.D. as they send their research to the space station.

From preparing the experiment in the lab….

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To training the astronauts to perform the science…

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To watching it launch to space…

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To conducting the science aboard the space station, we’ve been there every step of the way.

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Now you can follow along with the whole journey!

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Binge watch all of NASA Explorers season 4: Microgravity HERE

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


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That’s A Wrap! Thank You All So Much For Your Awesome Questions! 

That’s a wrap! Thank you all so much for your awesome questions! 

If you’re looking for other ways to enjoy #EarthDayatHome, check out this feature: https://www.nasa.gov/feature/goddard/2020/earthdayathome-with-nasa/

Don’t forget to follow NASA Earth on Twitter, Facebook and Instagram.

You can follow Sandra Cauffman on Twitter, HERE. 

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2 years ago

50 Years Ago: Apollo 17

Not long after midnight on Dec. 7, 1972, the last crewed mission to the Moon, Apollo 17, lifted off with three astronauts: Eugene Cernan, Harrison Schmitt, and Ronald Evans.

Experience the Apollo 17 launch and follow the mission in real time.

The Apollo 17 Space Vehicle sits poised beneath a full moon on Launch Pad 39A at the Kennedy Space Center during the launch countdown. The Saturn V rocket is mostly white, with several black patches, American flags, and the letters “USA” on its side. It is connected to an orange launch tower on the left. Credit: NASA

Meet the Crew

Let’s meet the astronauts who made the final Apollo trip to the Moon, including the first scientist-astronaut.

Gene Cernan: In 1972, Apollo 17 Mission Commander Eugene A. Cernan had two space flights under his belt, Gemini 9 in June 1966, and Apollo 10 in May 1969. He was a naval aviator, electrical and aeronautical engineer and fighter pilot.

Ron Evans: Apollo 17 Command Module Pilot Ronald E. Evans was selected as a member of the 4th group of NASA astronauts in 1966. Like Cernan, he was an electrical and aeronautical engineer, and naval aviator before his assignment to the Apollo 17 crew.

Harrison (Jack) Schmitt: Lunar Module Pilot Dr. Harrison (Jack) Schmitt joined NASA as a member of the first group of scientist-astronauts in 1965. Before working for NASA, Schmitt was a geologist at the USGS Astrogeology Center. He was on the backup crew for Apollo 15 before being selected for the prime crew of Apollo 17. He became the first of the scientist-astronauts to go to space and the 12th human to walk on the Moon.

The Apollo 17 prime astronaut crew observes pre-launch activity at Complex 39A at NASA’s Kennedy Space Center while participating in Emergency Egress Test. They are, left to right, Ronald E. Evans, Harrison H. Schmitt, and Eugene A. Cernan. Credit: NASA

The Blue Marble

“The Blue Marble,” one of the most reproduced images in history, was taken 50 years ago on Dec. 7, 1972 by the Apollo 17 crew as they made their way to the Moon.

This view of Earth was seen by the Apollo 17 crew as they traveled toward the moon on their NASA lunar landing mission. This outstanding trans-lunar coast photograph extends from the Mediterranean Sea area to the Antarctica south polar ice cap. This is the first time the Apollo trajectory made it possible to photograph the south polar ice cap. Note the heavy cloud cover in the Southern Hemisphere. Almost the entire coastline of Africa is clearly visible. The Arabian Peninsula can be seen at the northeastern edge of Africa. The large island off the coast of Africa is the Malagasy Republic. The Asian mainland is on the horizon toward the northeast. Credit: NASA

Bag of Soup, Anyone?

NASA astronauts have an array of menu items to stay well fed and hydrated on missions. For Apollo 17, the menus allocated around 2,500 calories per day for each astronaut. They included:

Bacon Squares

Peanut Butter Sandwiches

Frankfurters

Lobster Bisque

Like anything going to space, weight and containment matter. That's why the Apollo 17 menu included plenty of soups and puddings.

Ron Evans smiles as he holds up a packet of soup during the outbound trip of Apollo 17. Credit: NASA

Synchronicity

On Dec. 11, 2022,  the Artemis I mission will be splashing down on Earth after its 25.5-day mission. At 2:55 p.m. 50 years prior, the Apollo 17 lunar module (LM) landed on the Moon, with Commander Gene Cernan and LM Pilot Harrison Schmitt on board. Ron Evans remained in the Command and Service Module (CSM) orbiting the Moon.

Experience the landing.

The half Earth appears in the black sy over the Lunar Module on the lunar surface. The spacecraft has a radio dish, black thermal blankets, and a tubular metal support structure. Credit: NASA

Planting the Flag

One of the first tasks the Apollo 17 crew did on their first moonwalk was to plant the American flag. There’s no wind on the Moon, but that doesn’t mean the flag has to droop. Did you know that a horizontal rod with a latch makes the flag appear to be flying in the wind? Gene Cernan carefully composed this photo to get Schmitt, the flag, and the Earth in a single shot.

So, is the flag still there? Images of the Apollo 17 landing site from the Lunar Reconnaissance Orbiter Camera show that in 2011 the flag was still standing and casting a shadow!

Astronaut Harrison Schmitt poses in a bulky white spacesuit on the Lunar surface next to an American flag. The Earth hangs in the black sky in the background, and fellow astronaut Eugene Cernan is seen in the reflection of Schmitt's golden visor. Credit: NASA

Moon Buggy

During Apollo 17, the Lunar Rover Vehicle (LRV), nicknamed the Moon buggy, logged the farthest distance from the Lunar Module of any Apollo mission, about 4.7 miles (7.5 km). 

As a precaution, the LRV had a walk-back limit in the event of an issue; astronauts had to have enough resources to walk back to the lunar module if need be.

Astronaut Gene Cernan wears a bulky white space suit with a gold visor. He is sitting in the Lunar Roving Vehicle (LRV), a car-like open vehicle with large, round tires and red-orange fenders. It sits on the surface of the gray, dusty Moon. The mountain sloping upward in the right background is the east end of South Massif. Credit: NASA

Grab the Duct Tape!

The right rear fender extension of the LRV (Moon buggy) was torn off, kicking up dust as the crew drove, reducing visibility. The crew made a resourceful repair using duct tape and maps.

For LRV fans, visiting an LRV driven on the Moon is a bit difficult since all three LRVs used on the Apollo 15, 16, and 17 missions were left on the Moon. But you can find an LRV used for training at the National Air and Space Museum in Washington. Read more about the LRV.

A close-up view of the rear right wheel of the Lunar Roving Vehicle (LRV) at the Taurus-Littrow. Note the makeshift repair arrangement on the fender of the LRV; a folded map is held in place parallel to the wheel with several strips of gray duct tape. Below the wheel, sunlight casts stark shadows on the dusty lunar surface. Credit: NASA

The Perils of Lunar Dust

After the first lunar EVA, Apollo 17 astronaut Harrison Schmitt reported that he suffered from “lunar hay fever” in reaction to the lunar dust. Unlike Earth’s dust particles which are rounded, Moon dust particles are sharp and abrasive, irritating astronaut eyes, nasal passages, and lungs.

Curious about how Moon dust feels and smells? Find out!

Scientist-astronaut Harrison Schmitt, Apollo 17 lunar module pilot, uses an adjustable sampling scoop to retrieve lunar samples during the second Apollo 17 extravehicular activity (EVA), at Station 5 at the Taurus-Littrow landing site. A gnomon is atop the large rock in the foreground. The gnomon is a stadia rod mounted on a tripod, and serves as an indicator of the gravitational vector and provides accurate vertical reference and calibrated length for determining size and position of objects in near-field photographs. The color scale of blue, orange and green is used to accurately determine color for photography. Credit: NASA

So What’s it Like?

After his return to Earth, Apollo 17 astronaut Harrison Schmitt (on the right) described his time on the Moon:

“Working on the Moon is a lot of fun. It’s like walking around on a giant trampoline all the time and you’re just as strong as you were here on Earth, but you don’t weigh as much.”

Astronaut Gene Cernan (left) and scientist-astronaut Harrison Schmitt wear white flight suits with Apollo patches on the left chest. Behind them is a gray metal hatch decorated with a small American flag. Credit: NASA

Splashdown! 

After 12 days and 14 hours in space, the Apollo 17 astronauts splashed down in the Pacific Ocean at 2:25 p.m. EST on Dec. 19, 1972. It was the longest of all the Apollo missions, with the most photos taken. A recovery team was waiting on the USS Ticonderoga just 4 miles (6.4 km) away to pick up the astronauts, the lunar samples, and the Crew Module.

The Apollo 17 Command Module (CM), with astronauts Gene Cernan, Ron Evans and Harrison Schmitt aboard appears as a small conical spaceship.The capsule nears splashdown in the South Pacific Ocean with three enormous red-and-white striped parachutes. This overhead view was taken from a recovery aircraft seconds before the spacecraft hit the blue water. Later, the three crewmen were picked up by a helicopter from the prime recovery ship, USS Ticonderoga. Credit: NASA

When Are We Going Back?

NASA’s Artemis Program has taken its first steps to sending humans back to the Moon with Artemis I, currently on its way back to Earth. The program plans to land humans, including the first women and person of color, on the Moon’s south polar region with its Artemis III mission, currently slated to launch in 2025.

Is aerospace history your cup of tea? Be sure to check out more from NASA’s past missions at www.nasa.gov/history.

Make sure to follow us on Tumblr for your regular dose of space!


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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.

Follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com


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8 years ago
Soaring Through The Skies! This View Looks From The Window Of Our F-18 Support Aircraft During A 2016

Soaring through the skies! This view looks from the window of our F-18 support aircraft during a 2016 Orbital ATK air-launch of its Pegasus rocket. 

The CYGNSS mission, led by the University of Michigan, will use eight micro-satellite observatories to measure wind speeds over Earth’s oceans, increasing the ability of scientists to understand and predict hurricanes. 

CYGNSS launched at 8:37 a.m. EST on Thursday, Dec. 15, 2016 from our Kennedy Space Center in Florida. CYGNSS launched aboard an Orbital ATK Pegasus XL rocket, deployed from Orbital’s “Stargazer” L-1011 carrier aircraft.

Pegasus is a winged, three-stage solid propellant rocket that can launch a satellite into low Earth orbit. How does it work? Great question!

After takeoff, the aircraft (which looks like a commercial airplane..but with some special quirks) flies to about 39,000 feet over the ocean and releases the rocket. 

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


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5 years ago

Water, Water Everywhere; We Track Drops to Drink!

When we think about what makes a planet habitable, we’re often talking about water. With abundant water in liquid, gas (vapor) and solid (ice) form, Earth is a highly unusual planet. Almost 70% of our home planet’s surface is covered in water!

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But about 97% of Earth’s water is salty – only a tiny amount is freshwater: the stuff humans, pets and plants need to survive.

Water on our planet is constantly moving, and not just geographically. Water shifts phases from ice to water to vapor and back, moving through the planet’s soils and skies as it goes.

That’s where our satellites come in.

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Look at the Midwestern U.S. this spring, for example. Torrential rain oversaturated the soil and overflowed rivers, which caused severe flooding, seen by Landsat.

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Our satellites also tracked a years-long drought in California. Between 2013 and 2014, much of the state turned brown, without visible green.  

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It’s not just rain. Where and when snow falls – and melts – is changing, too. The snow that falls and accumulates on the ground is called snowpack, which eventually melts and feeds rivers used for drinking water and crop irrigation. When the snow doesn’t fall, or melts too early, communities go without water and crops don’t get watered at the right time.

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Even when water is available, it can become contaminated by blooms of phytoplankton, like cyanobacteria . Also known as blue-green algae, these organisms can make humans sick if they drink the water. Satellites can help track algae from space, looking for the brightly colored blooms against blue water.

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Zooming even farther back, Earth’s blue water is visible from thousands of miles away. The water around us makes our planet habitable and makes our planet shine blue among the darkness of space.

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Knowing where the water is, and where it’s going, helps people make better decisions about how to manage it. Earth’s climate is changing rapidly, and freshwater is moving as a result. Some places are getting drier and some are getting much, much wetter. By predicting droughts and floods and tracking blooms of algae, our view of freshwater around the globe helps people manage their water.

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


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