“Different Worlds” was uploaded to Flickr

Although Tethys and Janus both orbit Saturn and are both made of more or less the same materials, they are very different worlds. via NASA ift.tt/1RftqBR
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Different Worlds was taken on February 26, 2016 at 11:05AM

“Hubble's Blue Bubble” was uploaded to Flickr

The distinctive blue bubble appearing to encircle WR 31a is a Wolf–Rayet nebula — an interstellar cloud of dust, hydrogen, helium and other gases. Created when speedy stellar winds interact with the outer layers of hydrogen ejected by Wolf–Rayet stars, these nebulae are frequently ring-shaped or spherical. via NASA ift.tt/1oEvGez
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Hubble's Blue Bubble was taken on February 22, 2016 at 01:00AM

“Mathematician Katherine Johnson at Work” was uploaded to Flickr

NASA research mathematician Katherine Johnson is photographed at her desk at Langley Research Center in 1966. Johnson made critical technical contributions during her career of 33 years, which included calculating the trajectory of the 1961 flight of Alan Shepard. She was awarded the Presidential Medal of Freedom on Nov. 24, 2015. via NASA ift.tt/1QgSqsn
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Mathematician Katherine Johnson at Work was taken on December 03, 2015 at 06:51AM

“Flying Through the Aurora's Green Fog” was uploaded to Flickr

Expedition 46 crew member Tim Peake of the European Space Agency (ESA) shared a stunning image of a glowing aurora taken on Feb. 23, 2016, from the International Space Station. Peake wrote, "The @Space_Station just passed straight through a thick green fog of #aurora…eerie but very beautiful. #Principia" via NASA ift.tt/1Qyiuyk
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Flying Through the Aurora's Green Fog was taken on February 23, 2016 at 12:58PM

“The Ice Fields of Patagonia” was uploaded to Flickr

This image, acquired by the Operational Land Imager (OLI) on Landsat 8, shows the glaciers of Sierra de Sangra on Jan. 14, 2015. Snow and ice are blue in these false-color images, which use different wavelengths to better differentiate areas of ice, rock, and vegetation. via NASA ift.tt/1T4g2qg
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The Ice Fields of Patagonia was taken on February 18, 2016 at 10:37AM

“Three Times the Fun” was uploaded to Flickr

Three of Saturn's moons -- Tethys, Enceladus and Mimas -- are captured in this group photo from NASA's Cassini spacecraft. via NASA ift.tt/1PSmkVP
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Three Times the Fun was taken on February 22, 2016 at 02:07AM

“Jarosite in the Noctis Labyrinthus Region of Mars” was uploaded to Flickr

This image, acquired on Nov. 24, 2015 by the High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA's Mars Reconnaissance Orbiter, shows the western side of an elongated pit depression in the eastern Noctis Labyrinthus region of Mars. Along the pit's upper wall is a light-toned layered deposit. via NASA ift.tt/1VsgGvb
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Jarosite in the Noctis Labyrinthus Region of Mars was taken on February 19, 2016 at 03:29AM

“Looking Back: Astronaut Mae Jemison Suits Up For Launch” was uploaded to Flickr

On Sept. 12, 1992, launch day of the STS-47 Spacelab-J mission on space shuttle Endeavour, NASA astronaut Mae Jemison waits as her suit technician, Sharon McDougle, performs a unpressurized and pressurized leak check on her spacesuit at the O&C Building at Kennedy Space Center. Dr. Jemison was the first African-American woman to fly in space. via NASA ift.tt/1UawQLh
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Looking Back: Astronaut Mae Jemison Suits Up For Launch was taken on July 22, 2010 at 11:37AM

“Commercial Crew Partner Boeing Tests Starliner Spacecraft” was uploaded to Flickr

Engineers from NASA’s Langley Research Center and Boeing dropped a full-scale test article of the company’s CST-100 Starliner into Langley’s 20-foot-deep Hydro Impact Basin. Although the spacecraft is designed to land on land, Boeing is testing the Starliner’s systems in water to ensure astronaut safety in the unlikely event of an emergency. via NASA ift.tt/218F5cG
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Commercial Crew Partner Boeing Tests Starliner Spacecraft was taken on February 09, 2016 at 12:12PM

“Flowers Harvested on the Ground and in Space for Deep-Space Food Crop Research” was uploaded to Flickr

Zinnia plants from the Veggie ground control experiment at NASA’s Kennedy Space Center in Florida were harvested Feb. 11 in the same way that crew member Scott Kelly will harvest the zinnias growing in the Veggie system aboard the International Space Station on Feb. 14—Valentine’s Day. via NASA ift.tt/247LgjK
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Flowers Harvested on the Ground and in Space for Deep-Space Food Crop Research was taken on February 11, 2016 at 04:17AM

“Hubble Watches the Icy Blue Wings of Hen 2-437” was uploaded to Flickr

In this cosmic snapshot, the spectacularly symmetrical wings of planetary nebula Hen 2-437 show up in a magnificent icy blue hue. via NASA ift.tt/1O6EZc8
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Hubble Watches the Icy Blue Wings of Hen 2-437 was taken on February 12, 2016 at 04:55AM

“Astronaut Peggy Whitson Trains For a Spacewalk” was uploaded to Flickr

NASA astronaut Peggy Whitson trains underwater for a spacewalk at the Neutral Buoyancy Laboratory (NBL) at Johnson Space Center in Houston. Whitson is scheduled to launch to the International Space Station in late 2016 as part of Expedition 50/51. via NASA ift.tt/1muWexu
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Astronaut Peggy Whitson Trains For a Spacewalk was taken on January 12, 2016 at 07:13AM

“Sea Ice and Cloud Streets in the Sea of Okhotsk” was uploaded to Flickr

The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Aqua satellite captured this image of cloud streets and sea ice in the Sea of Okhotsk on Feb. 8, 2016. Cloud streets are long parallel bands of cumulus clouds that form when cold air blows over warmer waters and a warmer air layer rests over the top of both. via NASA ift.tt/1osc2Tu
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Sea Ice and Cloud Streets in the Sea of Okhotsk was taken on February 10, 2016 at 04:27AM

“Feb. 9, 1995, Bernard Harris and Michael Foale Ready For a Spacewalk” was uploaded to Flickr

STS-63 astronauts Bernard A. Harris, Jr., payload commander (right), and C. Michael Foale, mission specialist (left), are ready to exit space shuttle Discovery's airlock for a spacewalk on Feb. 9, 1995. On this extravehicular activity (EVA), which lasted 4 hours and 38 minutes, Bernard Harris became the first African-American to walk in space. via NASA ift.tt/20TmLnI
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Feb. 9, 1995, Bernard Harris and Michael Foale Ready For a Spacewalk was taken on February 08, 1995 at 07:00PM

“Space Station Flyover of Super Bowl 50” was uploaded to Flickr

On the evening of Feb. 7, 2016, Expedition 46 Commander Scott Kelly snapped this photo of Levi's Stadium in Santa Clara, Calif. from the International Space Station, writing, "Got to see the #SuperBowl in person after all! But at 17,500MPH, it didn't last long. #YearInSpace" via NASA ift.tt/20Rhu07
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Space Station Flyover of Super Bowl 50 was taken on February 08, 2016 at 04:40AM

“Hubble Views Merging Galaxies in Eridanus” was uploaded to Flickr

This image, taken by the NASA/ESA Hubble Space Telescope, shows a peculiar galaxy known as NGC 1487, lying about 30 million light-years away in the southern constellation of Eridanus. via NASA ift.tt/1nLNNyI
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Hubble Views Merging Galaxies in Eridanus was taken on February 01, 2016 at 01:00AM

“Floating Hills on Pluto's Sputnik Planum” was uploaded to Flickr

The nitrogen ice glaciers on Pluto appear to carry an intriguing cargo: numerous, isolated hills that may be fragments of water ice from Pluto’s surrounding uplands. These hills individually measure one to several miles or kilometers across, according to images and data from NASA’s New Horizons mission. via NASA ift.tt/1nPILSw
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Floating Hills on Pluto's Sputnik Planum was taken on February 01, 2016 at 08:43AM

“Feb. 3, 1995, Astronaut Eileen Collins at the Pilot's Station on Shuttle Discovery” was uploaded to Flickr

In this Feb. 3, 1995, image taken onboard space shuttle Discovery on flight day one of the STS-63 mission, astronaut Eileen M. Collins -- the first woman to pilot the shuttle -- is at the pilot's station during a "hotfiring" procedure prior to rendezvous with the Russian Mir Space Station. via NASA ift.tt/1o6BSMq
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Feb. 3, 1995, Astronaut Eileen Collins at the Pilot's Station on Shuttle Discovery was taken on August 13, 2009 at 10:56AM

“Successful Deployment of University Satellites From Space Station” was uploaded to Flickr

Expedition 46 flight engineer Tim Peake of ESA captured this photo on Jan. 29, 2016 from the International Space Station, as the robotic arm in Japan's Kibo laboratory successfully deployed two combined satellites: AggieSat4 built by Texas A&M University students, and BEVO-2 built by University of Texas students. via NASA ift.tt/1PdBVNe
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Successful Deployment of University Satellites From Space Station was taken on January 29, 2016 at 10:56AM

“Super Guppy Ready to Transport the Orion Spacecraft” was uploaded to Flickr

NASA's Super Guppy aircraft readies to transport an Orion spacecraft from the Michoud Assembly Facility in Louisiana to Kennedy Space Center in Florida. via NASA ift.tt/1P9X4be
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Super Guppy Ready to Transport the Orion Spacecraft was taken on February 01, 2016 at 03:12AM