"Caught brushing my teeth!" | International Space Station

NASA ScienceCasts: Embers from a Rock Comet: The 2014 Geminid Meteor Shower

Earth's Biosphere: The Green Marble | NASA

Starry Night in Northern Chile

Canadarm2 Robotic Arm | International Space Station

Homage to Patagonia, South America | International Space Station

NASA Mars Opportunity Rover at Bright Outcrop on Endeavour Rim

The magnetic field along the Galactic plane | ESA's Planck Satellite

SOFIA takes off from Hamburg Airport, Germany | NASA/DLR

The Rocky Mountain Trench | International Space Station

NASA Commander Cernan Jump Salutes U.S. Flag | Apollo 17

NASA Astronaut Schmitt with Flag and Earth Above | Apollo 17

NASA Astronaut Schmitt Next to Big Boulder | Apollo 17

Drooping Loops [HD VIDEO] | NASA's Solar Dynamics Observatory

Drooping Loops | NASA's Solar Dynamics Observatory

The Infrared Visible Andromeda