Our Future Mars 2020 Rover, Seen Here As Imagined Through The Eyes Of An Artist, Will Search For Signs

It’s a U.S. Record! Cumulative Days in Space: 383

Today, Astronaut Scott Kelly has broken the record for longest time spent in space by a U.S. astronaut! Over the course of his four missions, Kelly has spent 383 cumulative days in space. This record was previously held by Astronaut Mike Fincke, with 382 days in space over three flights. Here are some more fun facts about this milestone:

4: The number of humans that have spent a year or more in orbit on a single mission

215 Days: The record currently held by Mike Lopez-Alegria for most time on a single spaceflight by U.S. astronaut. On Oct. 29, Kelly will break this record

377 Days: The current record for most days in space by a U.S. female astronaut, held by Peggy Whitson

879 Days: The record for most cumulative days in space by a human, currently held by Russian cosmonaut Gennady Padalka

Why Spend a Year in Space?

Kelly’s One-Year Mission is an important stepping stone on our journey to Mars and other deep space destinations. These investigations are expected to yield beneficial knowledge on the medical, psychological and biomedical challenges faced by astronauts during long-duration spaceflight.

Kelly is also involved in the Twins Study, which consists of ten separate investigations that are being conducted with his twin brother, who is on Earth. Since we are able to study two individuals who have the same genetics, but are in different environments for one year, we can gain a broader insight into the subtle effects and changes that may occur in spaceflight.

For regular updates on Kelly’s one-year mission aboard the space station, follow him on social media: Facebook, Twitter, Instagram.

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#TBT to 1989 when Voyager 2 spotted Uranus looking like a seemingly perfect robin’s egg. 💙⁣ ⁣ When our Voyager 2 spacecraft flew by it in this image, one pole was pointing directly at the Sun. This means that no matter how much it spins, one half is completely in the sun at all times, and the other half is in total darkness.. ⁣ ⁣ Far-flung, Uranus – an ice giant of our solar system – is as mysterious as it is distant. Soon after its launch in 2021, our James Webb Space Telescope will change that by unlocking secrets of its atmosphere. ⁣ ⁣ Image Credit: NASA/JPL-Caltech⁣ ⁣

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Jessica, first of all, I love you. Second, what's it like being a part of the first class that was 50% female?

Thank you!  The best part is that I think the fact that our class is 50% female simply reflects how far our society has come, and that is a great thing!  To us, there really is no difference on whether or not we are female or male, what backgrounds we come from, etc., we are one team, one family, all contributing to the same cause (which is an extraordinary feeling!).  I’m definitely very proud and honored to be part of the 21st astronaut class.

How Climate Change Showed Up in 2021

2021 was tied for the sixth-hottest year since modern record keeping began. We work together with the National Oceanic and Atmospheric Administration to track temperatures around the world and study how they change from year to year.

For decades, the overall global temperature has been increasing because of human activities. The last decade has been the warmest on record. Each individual year’s average temperature, however, can be affected by things like ocean circulation, volcanic eruptions, and specific weather events.

For instance, last year we saw the beginning of La Niña – a pattern of cooler waters in the Pacific – that was responsible for slightly cooling 2021’s average temperature. Still, last year continued a long-term trend of global warming.

Globally, Earth’s temperature in 2021 was nearly 2°F warmer than the late 19th Century, for the seventh year in a row.

The Record

Studying 142 Years

Since 1880, we can put together a consistent record of temperatures around the planet and see that it was much colder in the late-19th century. Before 1880, uncertainties in tracking global temperatures are larger. Temperatures have increased even faster since the 1970s, the result of increasing greenhouse gases in the atmosphere.

Tracking Millions of Individual Observations

Our scientists use millions of individual observations of data from more than 20,000 weather stations and Antarctic research stations, together with ship- and buoy-based observations of sea surface temperatures, to track global temperatures.

Reviewing Multiple Independent Records

Our global temperature record – GISTEMP – is one of a number of independent global temperature records, all of which show the same pattern of warming.

The Consequences

Everywhere Experiences Climate Change Differently

As Earth warms, temperature changes occur unevenly around the globe. The Arctic is currently warming about four times faster than the rest of the planet – a process called Arctic amplification. Similarly, urban areas tend to warm faster than rural areas, partly because building materials like asphalt, steel and concrete retain heat.

Droughts and Floods in Warmer Weather

More than 88% of the Western US experienced drought conditions in 2021. At the same time, communities in Western Europe saw two months’ worth of rain in 24 hours, breaking records and triggering flash floods. Because a hotter climate means more water can be carried in the atmosphere, areas like the Western US suffer drought from the increased 'thirstiness' of the atmosphere, while precipitation events can become more extreme as the amount of moisture in the atmosphere rises.

Sea Levels Continue to Rise

Melting ice raises sea levels around the world, as meltwater drains into the ocean. In addition, heat causes the ocean water to expand. From 1993 to today, global mean sea level has been rising around 3.4 millimeters per year. In 2021, sea level data from the recently launched NASA/ESA Sentinel-6 Michael Freilich mission became available to the public.

There is Hope

“This is not good news, but the fact that we are able to track this in real time and understand why it’s changing, and get people to notice why it’s changing and how we can change things to change the next trajectory, that gives me hope. Because we’re not in the dark here. We’re not the dinosaurs who are unaware the comet is coming. We can see the comet coming, and we can act.” – Dr. Gavin Schmidt, director of NASA GISS, where the global temperature record is calculated

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Finalists for a Future Mission to Explore the Solar System

We’ve selected two finalists for a robotic mission that is planned to launch in the mid-2020s! Following a competitive peer review process, these two concepts were chosen from 12 proposals that were submitted in April under a New Frontiers program announcement opportunity.

What are they?

In no particular order…

CAESAR

CAESAR, or the Comet Astrobiology Exploration Sample Return mission seeks to return a sample from 67P/Churyumov-Gerasimenko – the comet that was successfully explored by the European Space Agency’s Rosetta spacecraft – to determine its origin and history.

This mission would acquire a sample from the nucleus of comet Churyumov-Gerasimenko and return it safely to Earth. 

Comets are made up of materials from ancient stars, interstellar clouds and the birth of our solar system, so the CAESAR sample could reveal how these materials contributed to the early Earth, including the origins of the Earth's oceans, and of life.

Dragonfly

A drone-like rotorcraft would be sent to explore the prebiotic chemistry and habitability of dozens of sites on Saturn’s moon Titan – one of the so-called ocean worlds in our solar system.

Unique among these Ocean Worlds, Titan has a surface rich in organic compounds and diverse environments, including those where carbon and nitrogen have interacted with water and energy.

Dragonfly would be a dual-quadcopter lander that would take advantage of the environment on Titan to fly to multiple locations, some hundreds of miles apart, to sample materials and determine surface composition to investigate Titan's organic chemistry and habitability, monitor atmospheric and surface conditions, image landforms to investigate geological processes, and perform seismic studies.

What’s Next?

The CAESAR and Dragonfly missions will receive funding through the end of 2018 to further develop and mature the concepts. It is planned that from these, one investigation will be chosen in the spring of 2019 to continue into subsequent mission phases.

That mission would be the fourth mission in the New Frontiers portfolio, which conducts principal investigator (PI)-led planetary science missions under a development cost cap of approximately $850 million. Its predecessors are the New Horizons mission to Pluto and a Kuiper Belt object, the Juno mission to Jupiter and OSIRIS-REx, which will rendezvous with and return a sample of the asteroid Bennu. 

Key Technologies

We also announced that two mission concepts were chosen to receive technology development funds to prepare them for future mission opportunities.

The Enceladus Life Signatures and Habitability (ELSAH) mission concept will receive funds to enable life detection measurements by developing cost-effective techniques to limit spacecraft contamination on cost-capped missions.

The Venus In situ Composition Investigations (VICI) mission concept will further develop the VEMCam instrument to operate under harsh conditions on Venus. The instrument uses lasers on a lander to measure the mineralogy and elemental composition of rocks on the surface of Venus.

The call for these mission concepts occurred in April and was limited to six mission themes: comet surface sample return, lunar south pole-Aitken Basin sample return, ocean worlds, Saturn probe, Trojan asteroid tour and rendezvous and Venus insitu explorer.

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Fun Moments with Our Record Breaking Astronaut

Astronaut Scott Kelly has broken the record for longest time spent in space by a U.S. astronaut. He has spent a cumulative of 383 days in space over the course of four missions. What better way to celebrate than to highlight some of his fun moments on the internet:

A question from the president during a recent TweetChat:

Astronaut Scott Kelly occasionally hosts TweetChats from the International Space Station. During a recent chat, he happened to get a question from someone who lives at 1600 Pennsylvania Avenue! HERE’s a recap from a similar chat from the station. 

Tackling the tough questions during interviews:

During an interview with Katie Couric, Kelly explained what a day on the space station is really like...including the chores he can and can’t do. 

The pros and cons of having roommates:

The International Space Station is an orbiting laboratory where an international crew live, work and conduct valuable research. 

Getting supplies from cargo ships:

Living on the space station requires food, water and supplies. All of these things, plus experiments and other essentials are delivered to the crew via cargo ship. Learn more about our commercial resupply program HERE. 

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Earth is special. 🌎 

It's the only place in the universe that we know contains life. Celebrate its beauty by taking a look at these breathtaking images of our home planet. 

Swirling white clouds, deep blue oceans, and multicolored landscapes come to life on the pages of our new photo essay "Earth," a collection of dramatic images captured by satellites.  Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.

Jupiter in infrared light, as seen by NASA’s InfraRed Telescope Facility (IRTF). The observations were obtained in support of NASA’s Juno mission by a team headed by Juno scientist Glenn Orton.

Ways NASA Studies the Ocean

We live on a water planet. The ocean covers a huge part of the Earth's surface – earning it the name Blue Marble.

The ocean is one of Earth’s largest ecosystems and helps moderate Earth’s climate. NASA scientists spend a lot of time studying the ocean and how it is changing as Earth’s climate changes.

In the last few years, NASA has launched an array of missions dedicated to studying this precious part of our planet, with more to come. For World Oceans Month, which starts in June, here are new ways NASA studies the ocean.

1. Seeing the colors of the ocean 🎨

A new NASA mission called PACE will see Earth’s oceans in more color than ever before. The color of the ocean is determined by the interaction of sunlight with substances or particles present in seawater.

Scheduled to launch in 2024, PACE will help scientists assess ocean health by measuring the distribution of phytoplankton, tiny plants and algae that sustain the marine food web. PACE will also continue measuring key atmospheric variables associated with air quality and Earth's climate.

2. Surveying surface water around the globe 💧

The SWOT satellite, launched in late 2022, is studying Earth’s freshwater – from oceans and coasts to rivers, lakes and more – to create the first global survey of Earth’s surface water.

SWOT is able to measure the elevation of water, observing how major bodies of water are changing and detecting ocean features. The data SWOT collects will help scientists assess water resources, track regional sea level changes, monitor changing coastlines, and observe small ocean currents and eddies.

3. Setting sail to understand interactions between the ocean and atmosphere 🚢

With research aircraft, a research ship, and autonomous ocean instruments like gliders, NASA’s S-MODE mission is setting sail to study Earth’s oceans up close. Their goal? To understand ocean whirlpools, eddies and currents.

These swirling ocean features drive the give-and-take of nutrients and energy between the ocean and atmosphere and, ultimately, help shape Earth’s climate.

4. Building ocean satellites the size of a shoebox 📦

NASA’s HawkEye instrument collects ocean color data and captures gorgeous images of Earth from its orbit just over 355 miles (575 kilometers) above Earth’s surface. It’s also aboard a tiny satellite measuring just 10cm x 10 cm x 30 cm – about the size of a shoebox!

5. Designing new missions to study Earth’s oceans! 🌊

NASA is currently designing a new space-based instrument called GLIMR that will help scientists observe and monitor oceans throughout the Gulf of Mexico, the southeastern U.S. coastline and the Amazon River plume that stretches to the Atlantic Ocean. GLIMR will also provide important information about oil spills, harmful algae blooms, water quality and more to local agencies.

6. Taking the ocean to new heights ⬆️

The U.S.-European Sentinel-6 Michael Freilich satellite is helping researchers measure the height of the ocean - a key component in understanding how Earth’s climate is changing.

This mission, which launched in 2020, has a serious job to do. It’s not only helping meteorologists improve their weather forecasts, but it’s helping researchers understand how climate change is changing Earth’s coastlines in real time.

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10 Steps to Confirm a Planet Around Another Star

So you think you found an exoplanet -- a planet around another star? It’s not as simple as pointing a telescope to the sky and looking for a planet that waves back. Scientists gather many observations and carefully analyze their data before they can be even somewhat sure that they’ve discovered new worlds.

Here are 10 things to know about finding and confirming exoplanets.

This is an illustration of the different elements in our exoplanet program, including ground-based observatories, like the W. M. Keck Observatory, and space-based observatories like Hubble, Spitzer, Kepler, TESS, James Webb Space Telescope, WFIRST and future missions.

1. Pick your tool to take a look.

The vast majority of planets around other stars have been found through the transit method so far. This technique involves monitoring the amount of light that a star gives off over time, and looking for dips in brightness that may indicate an orbiting planet passing in front of the star.

We have two specialized exoplanet-hunting telescopes scanning the sky for new planets right now -- Kepler and the Transiting Exoplanet Survey Satellite (TESS) -- and they both work this way. Other methods of finding exoplanets include radial velocity (looking for a “wobble” in a star's position caused by a planet’s gravity), direct imaging (blocking the light of the star to see the planet) and microlensing (watching for events where a star passes in front of another star, and the gravity of the first star acts as a lens).

Here’s more about finding exoplanets.

2. Get the data.

To find a planet, scientists need to get data from telescopes, whether those telescopes are in space or on the ground. But telescopes don’t capture photos of planets with nametags. Instead, telescopes designed for the transit method show us how brightly thousands of stars are shining over time. TESS, which launched in April and just began collecting science data, beams its stellar observations back to Earth through our Deep Space Network, and then scientists get to work.

3. Scan the data for planets.

Researchers combing through TESS data are looking for those transit events that could indicate planets around other stars. If the star’s light lessens by the same amount on a regular basis -- for example, every 10 days -- this may indicate a planet with an orbital period (or “year”) of 10 days. The standard requirement for planet candidates from TESS is at least two transits -- that is, two equal dips in brightness from the same star.

4. Make sure the planet signature couldn’t be something else.

Not all dips in a star's brightness are caused by transiting planets. There may be another object -- such as a companion star, a group of asteroids, a cloud of dust or a failed star called a brown dwarf, that makes a regular trip around the target star. There could also be something funky going on with the telescope’s behavior, how it delivered the data, or other “artifacts” in data that just aren’t planets. Scientists must rule out all non-planet options to the best of their ability before moving forward.

5. Follow up with a second detection method.

Finding the same planet candidate using two different techniques is a strong sign that the planet exists, and is the standard for “confirming” a planet. That’s why a vast network of ground-based telescopes will be looking for the same planet candidates that TESS discovers. It is also possible that TESS will spot a planet candidate already detected by another telescope in the past. With these combined observations, the planet could then be confirmed. The first planet TESS discovered, Pi Mensae c, orbits a star previously observed with the radial-velocity method on the ground. Scientists compared the TESS data and the radial-velocity data from that star to confirm the presence of planet “c.”

Scientists using the radial-velocity detection method see a star’s wobble caused by a planet’s gravity, and can rule out other kinds of objects such as companion stars. Radial-velocity detection also allows scientists to calculate the mass of the planet.

6. …or at least another telescope.

Other space telescopes may also be used to help confirm exoplanets, characterize them and even discover additional planets around the same stars. If the planet is detected by the same method, but by two different telescopes, and has received enough scrutiny that the scientists are more than 99 percent sure it’s a planet, it is said to be “validated” instead of “confirmed.”

7. Write a paper.

After thoroughly analyzing the data, and running tests to make sure that their result still looks like the signature of a planet, scientists write a formal paper describing their findings. Using the transit method, they can also report the size of the planet. The planet’s radius is related to how much light it blocks from the star, as well as the size of the star itself. The scientists then submit the study to a journal.

8. Wait for peer review.

Scientific journals have a rigorous peer review process. This means scientific experts not involved in the study review it and make sure the findings look sound. The peer-reviewers may have questions or suggestions for the scientists. When everyone agrees on a version of the study, it gets published.

9. Publish the study.

When the study is published, scientists can officially say they have found a new planet. This may still not be the end of the story, however. For example, the TRAPPIST telescope in Chile first thought they had discovered three Earth-size planets in the TRAPPIST-1 system. When our Spitzer Space Telescope and other ground-based telescopes followed up, they found that one of the original reported planets (the original TRAPPIST-1d) did not exist, but they discovered five others --bringing the total up to seven wondrous rocky worlds.

10. Catalog and celebrate -- and look closer if you can!

Confirmed planets get added to our official catalog. So far, Kepler has sent back the biggest bounty of confirmed exoplanets of any telescope -- more than 2,600 to date. TESS, which just began its planet search, is expected to discover many thousands more. Ground-based follow-up will help determine if these planets are gaseous or rocky, and possibly more about their atmospheres. The forthcoming James Webb Space Telescope will be able to take a deeper look at the atmospheres of the most interesting TESS discoveries.

Scientists sometimes even uncover planets with the help of people like you: exoplanet K2-138 was discovered through citizen scientists in Kepler’s K2 mission data. Based on surveys so far, scientists calculate that almost every star in the Milky Way should have at least one planet. That makes billions more, waiting to be found! Stay up to date with our latest discoveries using this exoplanet counter.

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