SpaceX's Elon Musk Unveils Mars Colonization Dream Ship
The entrepreneur announces detailed plans for a reusable craft that can cary 100 people
Stories by Mike Wall
NASA Hails "Perfect" Launch for Asteroid-Sampling Mission
OSIRIS-REx is set to scrape dirt and gravel from a space rock and return to Earth in 2023
NASA's Dawn Mission Spies Ice Volcanoes on Ceres
"Cryovolcanism" and other curious features mark the dwarf planet as a surprisingly active and complex world
Mysterious Star Signal Stokes SETI Hopes, but Could Be Earthly
Scientists are investigating a signal from 94 light-years away that could have been created by aliens, but more likely results from an Earth-orbiting satellite or other contamination
NASA to Launch Asteroid-Sampling Mission in 3 Weeks
The OSIRIS-REx spacecraft is expected to return a pristine sample of the potentially hazardous space rock Bennu to Earth in September 2023
A Sixth Success! SpaceX Again Lands Rocket on a Ship at Sea
The private spaceflight company has landed its Falcon 9 rocket for the sixth time in the last eight months
Private Company Cleared for Moon Landing in 2017
Government approves robot mission for Moon Express, which wants to mine our satellite
Rosetta Mission Confirms Comets' Antiquity
A new study of cometary geology shows the objects are relics from the primordial solar system
Is Earth Safe from Asteroid Bennu?
NASA's OSIRIS-REx mission will reveal just how threatening this near-Earth asteroid could be
2 Newfound Alien Planets May Be Capable of Supporting Life
One is likely 10 percent warmer than Earth, the other 6 percent cooler
SpaceX Lands Another Rocket
Company racks up its 5th rocket landing in a cargo launch to the Space Station
Juno Spacecraft Captures First Photo from Jupiter Orbit
Image takes in the Great Red Spot, cloud belts and three big moons
New Dwarf Planet Found Far beyond Pluto
The newfound icy world may be roughly 700 kilometers in size, and orbits the sun once every 700 years
China Finishes Building the World's Largest Radio Telescope
A dish the size of 30 football fields will search for alien life
Curiosity Rover Stable after "Safe Mode" Glitch
Mission scientists are investigating what caused a suspension the Mars rover's activities on July 2
Newfound Asteroid is "Quasi-Moon" of Earth
Space rock is caught in a “little dance” with our planet, and will bob around us for years to come
The Universe May Be Expanding Faster Than Astronomers Thought
“Dark radiation” is named as a possible factor, as a new study suggests expansion could be 9 percent faster
Why Is Mercury's Transit of the Sun So Rare?
With Mercury’s inclined orbit, transits come 13 times a century
![SpaceX Racks Up Another Sea Landing [Video]](/sciam/cache/file/B5D38284-CF87-4F05-BFE5A01E69980757_small.jpg)
SpaceX Racks Up Another Sea Landing [Video]
The second successful landing of a Falcon 9 booster on a floating barge is a milestone for the aerospace company
Distant Dwarf Planet Has Its Own Moon
Orbiting object could hold lessons about the remote world Makemake
