"Coral reefs of the Bahamas and the Florida Keys…the vivid colors and patterns a work of art!" | NASA Astronaut Jeff Williams | International Space Station

Coral reefs of the Bahamas and the Florida Keys…the vivid colors and patterns a work of art! pic.twitter.com/bB5EKffy3e

— Jeff Williams (@Astro_Jeff) July 11, 2016

Happy 4th of July from NASA!

NASA's Free "Eyes" App: See Juno Spacecraft Get to Jupiter | JPL

Launch of Canada's fourth astronaut recruitment campaign | Canadian Space Agency

Happy Canada Day! Happy 149th Birthday, Canada!

"Goodnight from Space Station" | NASA Astronaut Jeff Williams

Good night from @Space_Station pic.twitter.com/cCR5hbejXa

— Jeff Williams (@Astro_Jeff) June 29, 2016

"Here’s looking over the shoulders of Green Bay, Milwaukee and Madison, Wisconsin, USA." | NASA Astronaut Jeff Williams | International Space Station

Here’s looking over the shoulders of Green Bay, Milwaukee and Madison, Wisconsin. pic.twitter.com/bM0s8TDuS6

— Jeff Williams (@Astro_Jeff) June 27, 2016

"Considering food production, these views from the north and south give a renewed significance to Central Valley, California" | NASA Astronaut Jeff Williams | International Space Station

Considering food production, these views from the north and south give a renewed significance to Central Valley, CA. pic.twitter.com/6YUNYHgMG7

— Jeff Williams (@Astro_Jeff) June 27, 2016

NASA Mars Curiosity Rover Descends Plateau, Turns to Mountain | Jet Propulsion Laboratory

.@MarsCuriosity analyzed its 12th drill sample & is now set to climb Mount Sharp on Mars: https://t.co/trXOpQCzGH pic.twitter.com/AaESVgUr1Y

— NASA (@NASA) June 19, 2016

Intriguing coastline of Western Australia. | NASA Astronaut Jeff Williams | International Space Station

Intriguing coastline of Western Australia.https://t.co/LHRyj7gA3U

— Jeff Williams (@Astro_Jeff) June 16, 2016

U.S. Flag at Half Staff to Honor Orlando Victims | NASA's Kennedy Space Center

Which part of this sunset captivates you more, the vibrant colors or the surrounding clouds? | NASA Astronaut Jeff Williams | International Space Station

Which part of this #sunset captivates you more, the vibrant colors or the surrounding clouds? pic.twitter.com/NpyW4JFAwV

— Jeff Williams (@Astro_Jeff) June 11, 2016

"Here’s looking back at you Glacier National Park. A place of spectacular beauty from space and from the ground." | NASA Astronaut Jeff Williams | International Space Station

Here’s looking back at you @GlacierNPS. A place of spectacular beauty from space and from the ground. #FindYourParkhttps://t.co/DrXXQHij8V

— Jeff Williams (@Astro_Jeff) June 10, 2016

Scan of the horizon right after sunrise. | NASA Astronaut Jeff Williams | International Space Station

Scan of the horizon right after sunrise.https://t.co/JU1Xvamb56

— Jeff Williams (@Astro_Jeff) June 10, 2016

NASA Astronaut Jeff Williams Explains How Orbit of International Space Station is Boosted

Occasionally we fire our engines to increase @Space_Station altitude. See what it's like inside when that happens.https://t.co/XrkQpbEiuD

— Jeff Williams (@Astro_Jeff) June 9, 2016

An oblique view of Mount Rainier National Park as well as Mt. Saint Helen's National Volcanic Monument | NASA Astronaut Jeff Williams | International Space Station

An oblique view of @MountRainierNPS as well as Mt Saint Helens Natl Volcanic Monument. pic.twitter.com/Py06LyPU89

— Jeff Williams (@Astro_Jeff) June 8, 2016