With extremely controlled and strict diets, it's not like astronauts have to worry about gaining too much weight on the space station. But have you ever stopped and wondered how you would actually measure mass in a weightless environment? After all, the entire concept of weight and scales is entirely dependent on…

I love this image of a Soyuz TMA-03M spacecraft just one second from landing on the very hard soil of the tundra near the town of Zhezkazgan, Kazakhstan. A perfect peaceful still moment—the calm before the rocking rumpus.

Like any other person, Don Pettit tweets, uploads YouTube videos, and maintains a blog. But unlike the rest of us, Don is doing it from the International Space Station. Blogging for Smithsonian's Air and Space magazine, Pettit tells us how to host dinner guests in Space.

Astronaut Don Pettit doesn't have the name recognition of Ansel Adams, but his work transcends cultures and borders around the globe, literally. Pettit is the photographer behind the amazing timelapses coming from the ISS and here he is with his cameras; all 10 of them.

Astronaut Don Pettit has a knack for making life on the space station seem like more fun than you can ever have on Earth. And recently he used the station's Lego collection for some entertaining makeshift experiments with static electricity.

See those explosions of light against the backdrop of our ever-spinning Earth? They are meteors burning through our planet's mesosphere, captured from the International Space Station in a time lapse made of 316 still frames by astronaut Don Pettit.

This image made at the International Space Station is not your usual ISS image. No firing auroras. No gleaming cities. No fuming catastrophes or crispy deserts or psychedelic rivers or turquoise seas. It looks as if the ISS were about to jump into hyperspace.