Space.com

What's Hot This Week Cave Astronauts Explore Deep Inside Earth to Simulate Spaceflight by Denise Chow, SPACE.com Staff Writer An international team of astronauts lived in a dark, isolated cave for six days to train for real space missions. China Basks in Spaceship Docking Success SPACE.com Staff The country's first-ever docking of two spacecraft in orbit was a key milestone for the nation's space program. Sponsored by: Japanese 'Tourist Camera' In Space Snaps Lightning & Auroras New Model Predicts Fallout from Big Meteorite Strike How to Spot Apollo Moon Landing Sites in Telescopes M8 Lagoon Nebula Wallpaper