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Space Stamps

Coming in to a post office near you: new “Views of Our Planets: Forever stamps featuring iconic images of the planets in our solar system, including the well-known “Blue Marble” photo of Earth.

New “Pluto Explored” Forever stamps commemorating the July 2015 flyby of Pluto by our New Horizons spacecraft are also being issued for online purchase.

The May 31 first-day-of-issue dedication ceremony for the Pluto and planetary stamps will be in New York City at the World Stamp Show. This international gathering of stamp collectors occurs only once each decade in the United States, and – with more than 250,000 visitors expected to attend – is the largest stamp show in the world.

The Pluto stamps are of special significance to the New Horizons team, which placed a 20-cent 1991 “Pluto: Not Yet Explored” stamp on board the spacecraft. On July 14, 2015, New Horizons carried the stamp on its history-making journey to Pluto and beyond, as jubilant members of the mission team celebrated with a large print, striking the words “not yet.”

The above pane of 16 Forever stamps, the Postal Service showcases some of the more visually compelling historic, full-disk images of the planets obtained during the last half-centruy of our space exploration. Eight new colorful Forever stamps – each shown twice – feature Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

This isn’t the first time that space has been featured on postal stamps. In the past, many different space images and missions have been highlighted on the tiny pieces of paper you stick on the corner of your mail.

Here’s a look at a few space stamps of the past:

Nebulae

Stamps depicting multiple nebulae seen by the Hubble Space Telescope were released in 2000. 

Pioneer 10 

Launched in 1972, Pioneer 10 was the first spacecraft to travel through the asteroid belt and obtain close-ups of Jupiter

U.S. Launches Satellites 

This stamp, released in 1999, depicts the post World War II race in space exploration. 

Alan Shepard: First American in Space

This stamp, released in 2011, featured Alan Shepard, the first American in space. Flying on the Mercury spacecraft, Shepard launched, flew 116 miles high and came back to Earth. His flight lasted about 15 and a half minutes. 

MESSENGER Mission

MESSENGER, launching in 2004, was the first spacecraft to orbit Mercury. This stamp, released in 2011, highlighted this mission and its importance. Understanding Mercury and how it formed is critical to better understanding the conditions on and evolution of the inner planets.

The new “Views of our Planets” stamps will be widely available across the U.S. at post offices and for online purchase beginning May 31. The Pluto – Explored Forever stamps will only be sold online or by calling 800-782-6724.

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

can you describe how earth looks like from space?

NASA’s New Planet Hunter Reveals a Sky Full of Stars

NASA’s newest planet-hunting satellite — the Transiting Exoplanet Survey Satellite, or TESS for short — has just released its first science image using all of its cameras to capture a huge swath of the sky! TESS is NASA’s next step in the search for planets outside our solar system, called exoplanets.

This spectacular image, the first released using all four of TESS’ cameras, shows the satellite’s full field of view. It captures parts of a dozen constellations, from Capricornus (the Sea Goat) to Pictor (the Painter’s Easel) — though it might be hard to find familiar constellations among all these stars! The image even includes the Large and Small Magellanic Clouds, our galaxy’s two largest companion galaxies.

The science community calls this image “first light,” but don’t let that fool you — TESS has been seeing light since it launched in April. A first light image like this is released to show off the first science-quality image taken after a mission starts collecting science data, highlighting a spacecraft’s capabilities.

TESS has been busy since it launched from NASA’s Kennedy Space Center in Cape Canaveral, Florida. First TESS needed to get into position, which required a push from the Moon. After nearly a month in space, the satellite passed about 5,000 miles from the Moon, whose gravity gave it the boost it needed to get into a special orbit that will keep it stable and maximize its view of the sky.

During those first few weeks, we also got a sneak peek of the sky through one of TESS’s four cameras. This test image captured over 200,000 stars in just two seconds! The spacecraft was pointed toward the constellation Centaurus when it snapped this picture. The bright star Beta Centauri is visible at the lower left edge, and the edge of the Coalsack Nebula is in the right upper corner.

After settling into orbit, scientists ran a number of checks on TESS, including testing its ability to collect a set of stable images over a prolonged period of time. TESS not only proved its ability to perform this task, it also got a surprise! A comet named C/2018 N1 passed through TESS’s cameras for about 17 hours in July.

The images show a treasure trove of cosmic curiosities. There are some stars whose brightness changes over time and asteroids visible as small moving white dots. You can even see an arc of stray light from Mars, which is located outside the image, moving across the screen.

Now that TESS has settled into orbit and has been thoroughly tested, it’s digging into its main mission of finding planets around other stars. How will it spot something as tiny and faint as a planet trillions of miles away? The trick is to look at the star!

So far, most of the exoplanets we’ve found were detected by looking for tiny dips in the brightness of their host stars. These dips are caused by the planet passing between us and its star – an event called a transit. Over its first two years, TESS will stare at 200,000 of the nearest and brightest stars in the sky to look for transits to identify stars with planets.

TESS will be building on the legacy of NASA’s Kepler spacecraft, which also used transits to find exoplanets. TESS’s target stars are about 10 times closer than Kepler’s, so they’ll tend to be brighter. Because they're closer and brighter, TESS’s target stars will be ideal candidates for follow-up studies with current and future observatories.

TESS is challenging over 200,000 of our stellar neighbors to a staring contest! Who knows what new amazing planets we’ll find?

The TESS mission is led by MIT and came together with the help of many different partners. You can keep up with the latest from the TESS mission by following mission updates.

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

7 Things That Happen When You Go To Space

Told Through Astronaut Scott Kelly’s Tweets

Astronaut Scott Kelly is currently spending a year in space. Most expeditions to the space station last four to six months. By doubling the length of this mission, researchers hope to better understand how the human body reacts and adapts to long-duration spaceflight. During this one-year mission, Kelly is also participating in the Twins Study. While Kelly is in space, his identical twin brother, retired NASA Astronaut Mark Kelly, will participate in a number of comparative genetic studies.

Here are a few things that happen when astronauts go to the space station:

1. Your personal hygiene takes on a different form:

2. Sleeping arrangements might take some getting used to:

3. Internet services will remind you of the 90s:

4. You never have to do laundry:

5. You get to become immersed in a range of different cultures:

6. All of your water is recycled…yes…that means urine too:

7. You get to see the Earth like never before:

Follow Astronaut Scott Kelly’s Year in Space mission on Facebook, Twitter and Instagram. 

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

Cosmic Alphabet Soup: Classifying Stars

If you’ve spent much time stargazing, you may have noticed that while most stars look white, some are reddish or bluish. Their colors are more than just pretty – they tell us how hot the stars are. Studying their light in greater detail can tell us even more about what they’re like, including whether they have planets. Two women, Williamina Fleming and Annie Jump Cannon, created the system for classifying stars that we use today, and we’re building on their work to map out the universe.

By splitting starlight into spectra – detailed color patterns that often feature lots of dark lines – using a prism, astronomers can figure out a star’s temperature, how long it will burn, how massive it is, and even how big its habitable zone is. Our Sun’s spectrum looks like this:

Astronomers use spectra to categorize stars. Starting at the hottest and most massive, the star classes are O, B, A, F, G (like our Sun), K, M. Sounds like cosmic alphabet soup! But the letters aren’t just random – they largely stem from the work of two famous female astronomers.

Williamina Fleming, who worked as one of the famous “human computers” at the Harvard College Observatory starting in 1879, came up with a way to classify stars into 17 different types (categorized alphabetically A-Q) based on how strong the dark lines in their spectra were. She eventually classified more than 10,000 stars and discovered hundreds of cosmic objects!

That was back before they knew what caused the dark lines in spectra. Soon astronomers discovered that they’re linked to a star’s temperature. Using this newfound knowledge, Annie Jump Cannon – one of Fleming’s protégés – rearranged and simplified stellar classification to include just seven categories (O, B, A, F, G, K, M), ordered from highest to lowest temperature. She also classified more than 350,000 stars!

Type O stars are both the hottest and most massive in the new classification system. These giants can be a thousand times bigger than the Sun! Their lifespans are also around 1,000 times shorter than our Sun’s. They burn through their fuel so fast that they only live for around 10 million years. That’s part of the reason they only make up a tiny fraction of all the stars in the galaxy – they don’t stick around for very long.

As we move down the list from O to M, stars become progressively smaller, cooler, redder, and more common. Their habitable zones also shrink because the stars aren’t putting out as much energy. The plus side is that the tiniest stars can live for a really long time – around 100 billion years – because they burn through their fuel so slowly.

Astronomers can also learn about exoplanets – worlds that orbit other stars – by studying starlight. When a planet crosses in front of its host star, different kinds of molecules in the planet’s atmosphere absorb certain wavelengths of light.

By spreading the star’s light into a spectrum, astronomers can see which wavelengths have been absorbed to determine the exoplanet atmosphere’s chemical makeup. Our James Webb Space Telescope will use this method to try to find and study atmospheres around Earth-sized exoplanets – something that has never been done before.

Our upcoming Nancy Grace Roman Space Telescope will study the spectra from entire galaxies to build a 3D map of the cosmos. As light travels through our expanding universe, it stretches and its spectral lines shift toward longer, redder wavelengths. The longer light travels before reaching us, the redder it becomes. Roman will be able to see so far back that we could glimpse some of the first stars and galaxies that ever formed.

Learn more about how Roman will study the cosmos in our other posts:

Roman’s Family Portrait of Millions of Galaxies

New Rose-Colored Glasses for Roman

How Gravity Warps Light

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

Vote for Your Favorite Astronaut Picture: Tournament Earth 2021

It is that time of year again…Tournament Earth is back! This year, NASA Earth Observatory has chosen a new theme for the tournament: astronaut photography. Choose your favorite image here.

For more than 20 years, astronauts have been shooting photos of Earth from the International Space Station that highlight the planet’s beauty, complexity, and vulnerabilities. So which are the most unforgettable ones? Over the next five weeks (March 8-April 13), you can help decide.

How can you get involved? It's easy as 1…2…3!

1. Read and Vote.

Not sure which image to vote for because they are ALL so captivating? Read the intriguing stories behind the images to help you decide! You can access the stories by clicking on the image headlines on the voting page: https://earthobservatory.nasa.gov/tournament-earth

For instance, the Stars in Motion image is actually a compilation of 72 photographs. And some of the night lights around Bangkok, Thailand, actually show fishing boats as well as city lights.

2. Fill out your bracket.

Think you know which photo will win it all? Fill out a #TournamentEarth bracket with your predictions and challenge friends! Then share your predictions with NASAEarth on our blog, Twitter, Facebook, Instagram, or right here on Tumblr!

We can't offer a trip to the Moon, but bragging rights are forever if you can pick the champion. Download a more print-friendly version of the bracket here.

3. View the results…and vote again!

Tournament Earth will have five rounds, and round one is currently underway. Voting for the following rounds begins on Tuesdays and will be open for six days. We will update our social media channels (including right here on Tumblr!) with the newest matchups. Check this space to see how your favorite images did. Then vote until we crown a champion on April 13, 2021.

See all of the images and vote HERE. Follow @NASAEarth on social media for updates.

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

Solar System: Things to Know This Week

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

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

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

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

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

Do You Love the Color of the Sun?

Get dazzled by the true spectrum of solar beauty. From fiery reds to cool blues, explore the vibrant hues of the Sun in a mesmerizing color order. The images used to make this gradient come from our Solar Dynamics Observatory. Taken in a variety of wavelengths, they give scientists a wealth of data about the Sun. Don't miss the total solar eclipse crossing North America on April 8, 2024. (It's the last one for 20 years!) Set a reminder to watch with us.

YouTube

2024 Total Solar Eclipse: Through the Eyes of NASA (Official Broadcast)

Watch live with us as a total solar eclipse moves across North America on April 8, 2024, traveling through Mexico, across the United States

Why are we studying them? What’s purpose of this field for us on earth?

National Aviation Day!

Today, August 19, is National Aviation Day! You might wonder why we’re celebrating National Aviation Day, let us tell you…

First, did you know that EVERY U.S. commercial aircraft and every U.S. air traffic control tower has NASA-developed technology on board? It’s true! Here at NASA, we're invested in aeronautic research. Today’s air transportation system is an integral part of the U.S. and global economies. 

It’s the primary mechanism for connecting countries across the world through moving people, as well as goods and services. You feel the impacts of aviation and the air transportation system everyday. Just about every product produced and purchased today has been touched by aviation in some way. Aircraft transport 17.7 billion tons of freight every year. While you may not have flown today, something you needed did.

Our aviation experts are dedicated to improving the design of airplanes so they’re more Earth friendly – less fuel use, lower pollution, less noise around airports. We also work with the Federal Aviation Administration to provide new tools to air traffic controllers for improving efficiency and reducing delays.

So, celebrate National Aviation Day with us! Spread Your Wings, take a photo, post it today and tag #SpreadYourWings and/or #NationalAviationDay. We may even pick your photo to highlight on our NASA web page!