Canadian Space Agency astronaut Jeremy Hansen is suspended over a mock-up of the International Space Station during a microgravity simulation. http://www.nasa.gov/sites/default/files/thumbnails/image/jsc2017e127993.jpg

This sequence of images shows the Sun from its surface to its upper atmosphere all taken at about the same time on Oct. 27, 2017. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22055.jpg

This false-color image demonstrates how use of special filters available on the Curiosity Mars rover's Mast Camera (Mastcam) can reveal the presence of certain minerals in target rocks. T http://www.nasa.gov/sites/default/files/thumbnails/image/pia22066_0.jpg

NASA is performing a series of tests to evaluate how astronauts and ground crew involved in final preparations before Orion missions will quickly get out of the spacecraft, if an emergency were to occur on the pad prior to launch. http://www.nasa.gov/sites/default/files/thumbnails/image/38093765071_045d50699f_o.jpg

As Cassini hurtled toward its fatal encounter with Saturn, the spacecraft turned to catch this final look at Saturn's moon Pandora next to the thin line of the F ring. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21355-1041.jpg

NASA's Solar Dynamics Observatory came across an oddity that the spacecraft has rarely observed before: a dark filament encircling an active region (Oct. 29-31, 2017). Solar filaments are clouds of charged particles that float above the sun, tethered to it by magnetic forces. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22104.jpg

On November 9, 1969, the uncrewed Apollo 4 test flight made a great ellipse around Earth as a test of the translunar motors and of the high speed entry required of a crewed flight returning from the Moon. http://www.nasa.gov/sites/default/files/thumbnails/image/as4-01-580.jpg

The Orbital ATK Antares rocket, with the Cygnus spacecraft onboard, launches from Pad-0A, Sunday, Nov. 12, 2017 http://www.nasa.gov/sites/default/files/thumbnails/image/38332007302_cc4875c5bf_o.jpg

Can you identify this river? http://www.nasa.gov/sites/default/files/thumbnails/image/amazon.jpg

On November 14, 1971, Mariner ( took this image of a shield volcano on Mars. http://www.nasa.gov/sites/default/files/thumbnails/image/7651156028_f41dfff15c_o.jpg

How can you see the atmosphere? The answer is blowing in the wind. http://www.nasa.gov/sites/default/files/thumbnails/image/12772_hurricanes_and_aerosols_youtube_1080.jpg

Orbital ATK's Cygnus resupply ship with its cymbal-ike UltraFlex solar arrays approaches the International Space Station on Nov. 14, 2017. http://www.nasa.gov/sites/default/files/thumbnails/image/37729733334_86a747017a_o.jpg

This color-enhanced image of a massive, raging storm in Jupiter’s northern hemisphere was captured by NASA’s Juno spacecraft. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21971-nasa.jpg

A broad hole in the corona was the Sun's dominant feature November 7-9, 2017. http://www.nasa.gov/sites/default/files/thumbnails/image/sdo.jpg

If you plant it, will it grow (in space)? The answer is yes, at least for certain types of plants. http://www.nasa.gov/sites/default/files/thumbnails/image/lettuce.jpg

Ice can be stunningly beautiful and also quite varied in its appearance. http://www.nasa.gov/sites/default/files/thumbnails/image/fingerrafting_pho_2017318_lrg.jpg

This artist's rendering shows the tidal disruption event named ASASSN-14li, where a star wandering too close to a 3-million-solar-mass black hole was torn apart. The debris gathered into an accretion disk around the black hole. http://www.nasa.gov/sites/default/files/thumbnails/image/assasn-14li_banner_0.jpg

These two images illustrate just how far Cassini traveled to get to Saturn. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21353-1041.jpg

Dellingr is a shoebox-sized spacecraft built to show that CubeSat platforms could be cost-effective, reliable and capable of gathering highly robust science. http://www.nasa.gov/sites/default/files/thumbnails/image/iss053e235252copy_0.jpg

The International Space Station is seen in this twenty-second exposure as it flies over the Washington National Cathedral, Wednesday, Nov. 29, 2017. Onboard are: NASA astronauts Joe Acaba, Mark Vande Hei, and Randy Bresnik; Russian cosmonauts Alexander Misurkin and Sergey Ryanzansky; and ESA astronaut Paolo Nespoli. http://www.nasa.gov/sites/default/files/thumbnails/image/26956023999_14c62dec79_o.jpg