Space.com

What's Hot This Week SpaceX Unveils Plan for World's First Fully Reusable Rocket by Mike Wall, SPACE.com Senior Writer The private spaceflight firm SpaceX will try to build the world's first completely reusable rocket and spaceship, a space travel method that could open the gates of Mars for humanity, the company's millionaire CEO Elon Musk announced Thursday. The 100-Year Starship: US Agencies Ponder Interstellar Travel Risk to Spacecraft by Clara Moskowitz, SPACE.com Senior Writer Warp drives. Artificial gravity. Terraforming planets. These concepts might sound as though they're ripped from the pages of science fiction, but they're the topic of serious scientific presentations at a symposium this weekend sponsored by DARPA, the Defense Advanced Research Projects Agency. Sponsored by: Earth Surrounded by Fewer Potentially Dangerous Asteroids Than Thought, NASA Finds China Launches 1st Space Lab Module Into Orbit for Docking Tests NASA Science Chief Steps Down Private Space Race On to Launch US Astronauts for NASA Russian Rocket Launches QuetzSat-1 Satellite for Mexico, US