Why's Your Suit So Colorful?

Greenland Refrozen

It won’t be until summertime that a significant amount of melt shows up across the Greenland Ice Sheet. For now, most indications of meltwater ponds and lakes are leftovers from past seasons that have since refrozen.

These photographs were snapped during research flights for NASA’s Operation IceBridge—now in its final year after a decade of airborne missions to map polar ice.

This second image was acquired on April 18, 2019, with the Continuous Airborne Mapping by Optical Translator (CAMBOT) system. The system takes downward-looking images throughout a flight, which can later be used by scientists to interpret other data. This image shows part of a large, frozen lake on Storstrømmen Glacier. This lake also thaws in summertime, which is why it shows up as blue ice.

Lakes atop a glacier, or “supraglacial lakes,” are somewhat stable in terms of their location, according to Joe MacGregor, NASA project scientist for Operation IceBridge. The lake on Storstrømmen is visible in satellite data at least as far back as May 2012. On occasion, water in lakes like this can drain away through a vertical shaft known as a “moulin.” Scientists initially wondered if the dark circular area on the right side of this image could be a moulin, but closer inspection suggested it is just a deeper part of the lake.

See more photos of the frozen lakes in Greenland: https://earthobservatory.nasa.gov/images/144965/greenland-refrozen

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Two Steps Forward in the Search for Life on Mars

We haven’t found aliens but we are a little further along in our search for life on Mars thanks to two recent discoveries from our Curiosity Rover.

We detected organic molecules at the harsh surface of Mars! And what’s important about this is we now have a lot more certainty that there’s organic molecules preserved at the surface of Mars. We didn’t know that before.

One of the discoveries is we found organic molecules just beneath the surface of Mars in 3 billion-year-old sedimentary rocks.

Second, we’ve found seasonal variations in methane levels in the atmosphere over 3 Mars years (nearly 6 Earth years). These two discoveries increase the chances that the record of habitability and potential life has been preserved on the Red Planet despite extremely harsh conditions on the surface.

Both discoveries were made by our chem lab that rides aboard the Curiosity rover on Mars.

Here’s an image from when we installed the SAM lab on the rover. SAM stands for “Sample Analysis at Mars” and SAM did two things on Mars for this discovery.

One - it tested Martian rocks. After the arm selects a sample of pulverized rock, it heats up that sample and sends that gas into the chamber, where the electron stream breaks up the chemicals so they can be analyzed.

What SAM found are fragments of large organic molecules preserved in ancient rocks which we think come from the bottom of an ancient Martian lake. These organic molecules are made up of carbon and hydrogen, and can include other elements like nitrogen and oxygen. That’s a possible indicator of ancient life…although non-biological processes can make organic molecules, too.

The other action SAM did was ‘sniff’ the air.

When it did that, it detected methane in the air. And for the first time, we saw a repeatable pattern of methane in the Martian atmosphere. The methane peaked in the warm, summer months, and then dropped in the cooler, winter months.

On Earth, 90 percent of methane is produced by biology, so we have to consider the possibility that Martian methane could be produced by life under the surface. But it also could be produced by non-biological sources. Right now, we don’t know, so we need to keep studying the Mars!

One of our upcoming Martian missions is the InSight lander. InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, is a Mars lander designed to give the Red Planet its first thorough checkup since it formed 4.5 billion years ago. It is the first outer space robotic explorer to study in-depth the "inner space" of Mars: its crust, mantle, and core.

Finding methane in the atmosphere and ancient carbon preserved on the surface gives scientists confidence that our Mars 2020 rover and ESA’s (European Space Agency's) ExoMars rover will find even more organics, both on the surface and in the shallow subsurface.

Read the full release on today’s announcement HERE. 

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Stop. Drop. And Apply to #BeAnAstronaut!

Feel like your place is in the stars? Are you an adventure seeker, an explorer, a person passionate about science and space? We need you!!

Applications are OPEN for our newest class of #Artemis astronauts. Once chosen, you could be the next person to step foot on the Moon and eventually embark on missions to Mars!

Do you have a friend who should apply? Tag them. Do you know someone who's still in school? Encourage them to follow their dreams and aim high.

To give you a sneak peak of what life will be like if you decide to #BeAnAstronaut, we’re taking you behind-the-scenes of astronaut life over the course of March. 

APPLY NOW AND GET MORE INFORMATION HERE! 

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The James Webb Space Telescope: A Story of Art & Science

Artists of all kinds were invited to apply for the chance to visit our Goddard Space Flight Center to be inspired by the giant, golden, fully-assembled James Webb Space Telescope mirror.

Art/Photo Credit: Jedidiah Dore

Webb has a mirror that is nearly 22 feet high and (to optimize it for infrared observations) is covered in a microscopic layer of actual gold.

Art/Photo Credit: Susan Lin

Because of Webb’s visually striking appearance, the project hosted a special viewing event on Wednesday, Nov. 2, 2016.

Photo Credit: Maggie Masetti

There was an overwhelming response to the event invitation and ultimately twenty-four people were selected to attend. They represented a broad range of artistic media and styles, including: watercolor, 3D printed sculpture, silk screening, acrylics, sumi-e (East Asian brush technique), comics, letterpress, woodwork, metalwork, jewelry making, fiber art, ink, mural painting, kite-making, tattooing, scientific illustration, poetry, songwriting, and video making.

Art/Photo Credit: Sue Reno

Project scientists and engineers spoke with visitors to give context to what they were seeing and explain why Webb is an engineering marvel, and how it will change our view of the universe. 

Among other things, Webb will see the first stars and galaxies that formed in the early universe and help us to better understand how planetary systems form and evolve. It will help us answer questions about who we, as humans, are and where we came from.

Art Credit: Jessica Lee Photo Credit: Maggie Masetti

The artists spent several hours sitting right in front of the telescope, where they sketched, painted, took photos and even filmed a music video.

Art Credit: Joanna Barnum Photo Credit: Maggie Masetti

While some of the pieces of art are finished, most of the artists went home with their heads full of ideas and sketchbooks full of notes. Stay tuned for more info on where you can see their final works displayed!

Art/Photo Credit: Susan Lin

Finished art from the event continues to be added HERE.

The James Webb Space Telescope is finishing environmental testing at our Goddard Space Flight Center in Greenbelt, Maryland. Next it will head to our Johnson Space Center in Houston for an end-to-end test at cryogenic temperatures. After that, it goes to Northrop Grumman to be mated with the giant tennis court-sized sunshield and the spacecraft bus.  The observatory will launch in October of 2018 from a European Space Agency (ESA) launch site in French Guiana, aboard an Ariane 5 rocket.  Webb is a collaboration of NASA, ESA, and the Canadian Space Agency (CSA).

Follow Webb on Facebook, Twitter and Instagram.

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Tornado Recovery Underway at Michoud Assembly Facility

Teams at our Michoud Assembly Facility in New Orleans worked overnight and are continuing Wednesday with assessment and recovery efforts following a tornado strike at the facility Tuesday at 11:25 a.m. CST. All 3,500 employees at the facility have been accounted for, with five sustaining minor injuries.

Teams worked through the night on temporary repairs to secure the perimeter fencing and provide access for the essential personnel through the main gate. Approximately 40 to 50 percent of the buildings at Michoud have some kind of damage; about five buildings have some form of severe damage.

Approximately 200 parked cars were damaged, and there was damage to roads and other areas near Michoud.

“The entire NASA family pulls together during good times and bad, and the teams at the Michoud Assembly Facility are working diligently to recover from the severe weather that swept through New Orleans Tuesday and damaged the facility,” said acting NASA Administrator Robert Lightfoot. “We are thankful for the safety of all the NASA employees and workers of onsite tenant organizations, and we are inspired by the resilience of Michoud as we continue to assess the facility’s status.”

Teams will reassess the condition of the Vertical Assembly Center (VAC), as the initial examination revealed some electrical damage to its substation. The VAC is used to weld all major pieces of hardware for the core stage of the Space Launch System. The most recently welded part was removed from the facility last week.

The team has prioritized completing the assessment at the site’s main manufacturing building for the Space Launch System and Orion spacecraft flight hardware so power can be restored in phases and temporary protection put in place to shield hardware from any further inclement weather.

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Can You #SpotHubble?

Hey Tumblr! We’re Inviting You to #SpotHubble

Since its launch in 1990, the Hubble Space Telescope has sent back mind-blowing images that not only changed our understanding of our universe, but also changed where we see our universe.

Hubble is more than a science instrument; it’s a cultural phenomenon! Take a moment to think about where you’ve seen the Hubble Space Telescope or Hubble images in your daily life. 

Maybe you walk by a mural inspired by Hubble images everyday on your way to work. 

Perhaps you’ve even created art based on Hubble images.

We want to see the Hubble impact in your life! Share your photos with us on Instagram, Twitter, Flickr and Facebook. If a #SpotHubble image catches our eye, we may share your post on our NASA Hubble social media accounts.

Here’s how to #SpotHubble!

There are four social media platforms that you can use to submit your work:

Flickr: Submit your photos to the Spot Hubble Flickr Group

Instagram: Use the Instagram app to upload your photo, and in the description include #SpotHubble and #NASAGoddard

Twitter: Share your image on Twitter and include #SpotHubble in the tweet

Facebook: Share your image on Facebook and include #SpotHubble in the post

Please note, submissions are subject to certain terms and conditions.

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NASA Spotlight: Earth Climate Scientist Dr. Yolanda Shea

Dr. Yolanda Shea is a climate scientist at NASA's Langley Research Center. She’s the project scientist for the CLARREO Pathfinder (CPF) mission, which is an instrument that will launch to the International Space Station to measure sunlight reflected from Earth. It will help us understand how much heat is being trapped by our planet’s atmosphere. Her mission is designed to help us get a clearer picture than we currently have of the Earth’s system and how it is changing

Yolanda took time from studying our home planet to answer questions about her life and career! Get to know this Earth scientist:

What inspired you to study climate science?

Starting in early middle school I became interested in the explanations behind the weather maps and satellite images shown on TV. I liked how the meteorologists talked about the temperature, moisture, and winds at different heights in the atmosphere, and then put that together to form the story of our weather forecasts. This made me want to learn more about Earth science, so I went to college to explore this interest more.

The summer after my junior year of college, I had an internship during which my first assignment was to work with a program that estimated ocean currents from satellite measurements. I was fascinated in the fact that scientists had discovered a way to map ocean currents from space!

Although I had learned about Earth remote sensing in my classes, this was my first taste of working with, and understanding the details of, how we could learn more about different aspects of the physical world from satellite measurements.

This led to my learning about other ways we can learn about Earth from space, and that includes rigorous climate monitoring, which is the area I work in now.

What does a day in your life look like?

Before I start my workday, I like to take a few minutes to eat breakfast, knit (I’m loving sock knitting right now!), and listen to a podcast or audio book. Each workday really looks different for me, but regardless, most days are a combination of quieter moments that I can use for individual work and more interactive times when I’m interfacing with colleagues and talking about project or science issues. Both types of work are fun in different ways, but I’m glad I have a mixture because all researchers need that combination of deep thinking to wrap our minds around complex problems and also time to tackle those problems with others and work on solving them together.

When do you feel most connected to Earth?

I’ve always loved sunsets. I find them peaceful and beautiful, and I love how each one is unique. They are also a beautiful reminder of the versatility of reflected light, which I study. Sitting for a moment to appreciate the beauty and calm I feel during a sunset helps me feel connected to Earth.

What will your mission – CLARREO Pathfinder – tell us about Earth?

CLARREO Pathfinder (CPF) includes an instrument that will take measurements from the International Space Station and will measure reflected sunlight from Earth. One of its goals is to demonstrate that it can take measurements with high enough accuracy so that, if we have such measurements over long periods of time, like several decades, we could detect changes in Earth’s climate system. The CPF instrument will do this with higher accuracy than previous satellite instruments we’ve designed, and these measurements can be used to improve the accuracy of other satellite instruments.

How, if at all, has your worldview changed as a result of your work in climate science?

The longer I work in climate science and learn from the data about how humans have impacted our planet, the more I appreciate the fragility of our one and only home, and the more I want to take care of it.

What advice would you give your younger self?

It’s ok to not have everything figured out at every step of your career journey. Work hard, do your best, and enjoy the journey as it unfolds. You’ll inevitably have some surprises along the way, and regardless of whether they are welcome or not, you’re guaranteed to learn something.

Do you have a favorite metaphor or analogy that you use to describe what you do, and its impact, to those outside of the scientific community?

I see jigsaw puzzles as a good illustration of how different members of a science community play a diverse set of roles to work through different problems. Each member is often working on their own image within the greater puzzle, and although it might take them years of work to see their part of the picture come together, each image in the greater puzzle is essential to completing the whole thing. During my career, I’ll work on a section of the puzzle, and I hope to connect my section to others nearby, but we may not finish the whole puzzle. That’s ok, however, because we’ll hand over the work that we’ve accomplished to the next generation of scientists, and they will keep working to bring the picture to light. This is how I try to think about my role in climate science – I hope to contribute to the field in some way; the best thing about what I have done and what I will do, is that someone else will be able to build on my work and keep helping humanity come to a better understanding of our Earth system.

What is a course that you think should be part of required school curriculum?

Time and project management skills – I think students tend to learn these skills more organically from their parents and teachers, but in my experience I stumbled along and learned these skills through trial and error. To successfully balance all the different projects that I support now, I have to be organized and disciplined, and I need to have clear plans mapped out, so I have some idea of what’s coming and where my attention needs to be focused.

Another course not specifically related to my field is personal financial management. I was interested in personal finance, and that helped me to seek out information (mainly through various blogs) about how to be responsible with my home finances. There is a lot of information out there, but making sure that students have a solid foundation and know what questions to ask early on will set them to for success (and hopefully fewer mistakes) later on.

What’s the most unexpected time or place that your expertise in climate science and/or algorithms came in handy?

I think an interesting part of being an atmospheric scientist and a known sky-watcher is that I get to notice beautiful moments in the sky. I remember being on a trip with friends and I looked up (as I usually do), and I was gifted with a gorgeous sundog and halo arc. It was such a beautiful moment, and because I noticed it, my friends got to enjoy it too.

Can you share a photo or image from a memorable NASA project you’ve worked on, and tell us a little bit about why the project stood out to you?

I absolutely loved being on the PBS Kids TV Show, SciGirls for their episode SkyGirls! This featured a NASA program called Students’ Clouds Observations On-Line (S’COOL). It was a citizen science program where students from around the globe could take observations of clouds from the ground that coincided with satellite overpasses, and the intention was to help scientists validate (or check) the accuracy of the code they use to detect clouds from satellite measurements. I grew up watching educational programming from PBS, so it was an honor to be a science mentor on a TV show that I knew would reach children across the nation who might be interested in different STEM fields. In this photo, the three young women I worked with on the show and I are talking about the different types of clouds.

To stay up to date on Yolanda's mission and everything going on in NASA Earth science, be sure to follow NASA Earth on Twitter and Facebook.

🌎 If you're looking for Earth Day plans, we have live events, Q&As, scavenger hunts and more going on through April 24. Get the details and register for our events HERE.

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Our Most “Liked” Instagram Posts of 2017

Our Instagram page has over 2,200 images and is lucky enough to be followed by more than 29 million fans.

What images and videos were your favorite from this past year? Great question, and one we asked ourselves too!

Here’s a look at our most liked Instagram posts* of 2017…Enjoy!

#10 Black Hole Collision

What happens when two supermassive black holes collide? Until last year, we weren’t quite sure. Gravitational waves!  With 834,169  likes, this image is our 10th most liked of 2017.

#9 Italy Through the Space Station Cupola Window

European astronaut Paolo Nespoli (@Astro_Paolo) shared this image on social media of "Southern #Italy and Sicily framed by one of our Cupola windows" aboard the International Space Station. This image ranks #9 for 2017 with 847,365 likes.

#8 Black Hole Friday

For our 5th annual #BlackHoleFriday we’ll share awesome images and facts about black holes! A black hole is a place in space where gravity pulls so much that even light cannot get out. With 916,247 likes, this picture ranks #8 for 2017.

#7 The Elements of Cassiopeia A

Did you know that stellar explosions and their remains--“supernova remnants”--are a source of chemical elements essential for life here on Earth? A new Chandra X-ray Observatory image captures the location of several vital elements like silicon (red), sulfur (yellow), calcium (green) and iron (purple), located on Cassiopeia A--a supernova remnant ~11,000 light years from Earth.  This image ranks #7 for 2017 with 943,806 likes.

#6 Jupiter Blues

Jupiter, you’re bluetiful 💙 ! Churning swirls of Jupiter’s clouds are seen in striking shades of blue in this new view taken by our Juno spacecraft. This image ranks as our sixth most liked Instagram post of 2017 with 990,944 likes.

#5 An Interstellar Visitor

An interstellar visitor…scientists have confirmed that an intriguing asteroid that zipped through our solar system in October is the first confirmed object from another star! Observations suggest that this unusual object had been wandering through the Milky Way, unattached to any star system, for hundreds of millions of years before its chance encounter with our star system. With 1,015,721 likes, this image ranks #5 for 2017.

#4 Space Station Lunar Transit

Space station supermoon. This composite image made from six frames shows the International Space Station, with a crew of six onboard, as it transits the Moon at roughly five miles per second on Dec. 2. This image ranks #4 for 2017 with 1,037,520 likes.

#3 The Space Between Us

A post shared by NASA (@nasa) on Dec 20, 2017 at 2:56pm PST

The beautiful space between Earth and the International Space Station was immortalized by NASA astronaut Mark Vande Hei while orbiting 250 miles above the planet we call home. This majestic image ranks #3 for 2017 with 1,042,403 likes.

#2 The Moon Swallows the Sun

A post shared by NASA (@nasa) on Aug 21, 2017 at 2:03pm PDT

Today, the Sun disappeared, seemingly swallowed by our Moon–at least for a while. The August 21 solar eclipse cut through a swath of North America from coast to coast and those along the path of totality, that is where the Moon completely covered the Sun, were faced with a sight unseen in the U.S. in 99 years. Which might have something to do with this image ranking #2 for 2017 with 1,144,503 likes.

#1 Solar Eclipse Over Cascade Lake

A post shared by NASA (@nasa) on Aug 21, 2017 at 3:57pm PDT

Behold! This progression of the partial solar eclipse took place over Ross Lake, in Northern Cascades National Park, Washington on Monday, Aug. 21, 2017. 

This photo was our #1 image of 2017 with 1,471,114 likes!

See them all here!

Do you want to get amazing images of Earth from space, see distant galaxies and more on Instagram? Of course you do! Follow us: https://www.instagram.com/nasa/

*Posts and rankings are were taken as of Dec. 28, 2017.

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Science-Heavy SpaceX Dragon Headed to Space Station

Heads up: a new batch of science is headed to the International Space Station aboard the SpaceX Dragon on April 2, 2018. Launching from Florida's Cape Canaveral Air Force Station atop a Falcon 9 rocket, this fire breathing (well, kinda…) spacecraft will deliver science that studies thunderstorms on Earth, space gardening, potential pathogens in space, new ways to patch up wounds and more.

Let's break down some of that super cool science heading 250 miles above Earth to the orbiting laboratory:

Sprites and Elves in Space

Atmosphere-Space Interactions Monitor (ASIM) experiment will survey severe thunderstorms in Earth's atmosphere and upper-atmospheric lightning, or transient luminous events. 

These include sprites, flashes caused by electrical break-down in the mesosphere; the blue jet, a discharge from cloud tops upward into the stratosphere; and ELVES, concentric rings of emissions caused by an electromagnetic pulse in the ionosphere.

Here's a graphic showing the layers of the atmosphere for reference:

Metal Powder Fabrication

Our Sample Cartridge Assembly (MSL SCA-GEDS-German) experiment will determine underlying scientific principles for a fabrication process known as liquid phase sintering, in microgravity and Earth-gravity conditions.

Science term of the day: Liquid phase sintering works like building a sandcastle with just-wet-enough sand; heating a powder forms interparticle bonds and formation of a liquid phase accelerates this solidification, creating a rigid structure. But in microgravity, settling of powder grains does not occur and larger pores form, creating more porous and distorted samples than Earth-based sintering. 

Sintering has many applications on Earth, including metal cutting tools, automotive engine connecting rods, and self-lubricating bearings. It has potential as a way to perform in-space fabrication and repair, such as building structures on the moon or creating replacement parts during extraterrestrial exploration.

Plants in space! It's l[a]unch time!

Understanding how plants respond to microgravity and demonstrating reliable vegetable production in space represent important steps toward the goal of growing food for future long-duration missions. The Veggie Passive Orbital Nutrient Delivery System (Veggie PONDS) experiment will test a passive nutrient delivery system in the station's Veggie plant growth facility by cultivating lettuce and mizuna greens for harvest and consumption on orbit.

The PONDS design features low mass and low maintenance, requires no additional energy, and interfaces with the Veggie hardware, accommodating a variety of plant types and growth media.

Quick Science Tip: Download the Plant Growth App to grow your own veggies in space! Apple users can download the app HERE! Android users click HERE!

Testing Materials in Space

The Materials ISS Experiment Flight Facility (MISSE-FF) experiment will provide a unique platform for testing how materials, coatings and components react in the harsh environment of space.

A continuation of a previous experiment, this version's new design eliminates the need for astronauts to perform spacewalks for these investigations. New technology includes power and data collection options and the ability to take pictures of each sample on a monthly basis, or more often if required. The testing benefits a variety of industries, including automotive, aeronautics, energy, space, and transportation.

New Ways to Develop Drugs in Space

Microgravity affects movement and effectiveness of drugs in unique ways. Microgravity studies already have resulted in innovative medicines to treat cancer, for example. The Metabolic Tracking investigation determines the possibility of developing improved drugs in microgravity, using a new method to test the metabolic impacts of drug compounds. This could lead to more effective, less expensive drugs.

Follow @ISS_Research on Twitter for your daily dose of nerdy, spacey goodness.

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Solar System: Things to Know This Week

Our Dawn mission to the asteroid belt is no ordinary deep space expedition. 

Instead of traditional chemical rockets, the spacecraft uses sophisticated ion engines for propulsion. This enabled Dawn to become the first mission to orbit not one, but two different worlds — first the giant asteroid Vesta and now the dwarf planet Ceres. Vesta and Ceres formed early in the solar system's history, and by studying them, the mission is helping scientists go back in time to the dawn of the planets. To mark a decade since Dawn was launched on Sept. 27, 2007, here are 10 things to know about this trailblazing mission.

1. Ion Engines: Not Just for Sci-Fi Anymore

Most rocket engines use chemical reactions for propulsion, which tend to be powerful but short-lived. Dawn's futuristic, hyper-efficient ion propulsion system works by using electricity to accelerate ions (charged particles) from xenon fuel to a speed seven to 10 times that of chemical engines. Ion engines accelerate the spacecraft slowly, but they're very thrifty with fuel, using just milligrams of xenon per second (about 10 ounces over 24 hours) at maximum thrust. Without its ion engines, Dawn could not have carried enough fuel to go into orbit around two different solar system bodies. Try your hand at an interactive ion engine simulation.

2. Time Capsules 

Scientists have long wanted to study Vesta and Ceres up close. Vesta is a large, complex and intriguing asteroid. Ceres is the largest object in the entire asteroid belt, and was once considered a planet in its own right after it was discovered in 1801. Vesta and Ceres have significant differences, but both are thought to have formed very early in the history of the solar system, harboring clues about how planets are constructed. Learn more about Ceres and Vesta—including why we have pieces of Vesta here on Earth.

3. Portrait of a Dwarf Planet

This view of Ceres built from Dawn photos is centered on Occator Crater, home of the famous "bright spots." The image resolution is about 460 feet (140 meters) per pixel.

Take a closer look.

4. What's in a Name? 

Craters on Ceres are named for agricultural deities from all over the world, and other features carry the names of agricultural festivals. Ceres itself was named after the Roman goddess of corn and harvests (that's also where the word "cereal" comes from). The International Astronomical Union recently approved 25 new Ceres feature names tied to the theme of agricultural deities. Jumi, for example, is the Latvian god of fertility of the field. Study the full-size map.

5. Landslides or Ice Slides? 

Thanks to Dawn, evidence is mounting that Ceres hides a significant amount of water ice. A recent study adds to this picture, showing how ice may have shaped the variety of landslides seen on Ceres today.

6. The Lonely Mountain 

Ahuna Mons, a 3-mile-high (5-kilometer-high) mountain, puzzled Ceres explorers when they first found it. It rises all alone above the surrounding plains. Now scientists think it is likely a cryovolcano — one that erupts a liquid made of volatiles such as water, instead of rock. "This is the only known example of a cryovolcano that potentially formed from a salty mud mix, and that formed in the geologically recent past," one researcher said. Learn more.

7. Shining a Light on the Bright Spots 

The brightest area on Ceres, located in the mysterious Occator Crater, has the highest concentration of carbonate minerals ever seen outside Earth, according to studies from Dawn scientists. Occator is 57 miles (92 kilometers) wide, with a central pit about 6 miles (10 kilometers) wide. The dominant mineral of this bright area is sodium carbonate, a kind of salt found on Earth in hydrothermal environments. This material appears to have come from inside Ceres, and this upwelling suggests that temperatures inside Ceres are warmer than previously believed. Even more intriguingly, the results suggest that liquid water may have existed beneath the surface of Ceres in recent geological time. The salts could be remnants of an ocean, or localized bodies of water, that reached the surface and then froze millions of years ago. See more details.

8. Captain's Log 

Dawn's chief engineer and mission director, Marc Rayman, provides regular dispatches about Dawn's work in the asteroid belt. Catch the latest updates here.

9. Eyes on Dawn 

Another cool way to retrace Dawn's decade-long flight is to download NASA's free Eyes on the Solar System app, which uses real data to let you go to any point in the solar system, or ride along with any spacecraft, at any point in time—all in 3-D.

10. No Stamp Required

Send a postcard from one of these three sets of images that tell the story of dwarf planet Ceres, protoplanet Vesta, and the Dawn mission overall.

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