Apr 17, 2014 — Kepler-186f is almost the same size as Earth, and it orbits in its star's "Goldilocks zone"— where temperatures may be just right for life. But much is unknown because it's also 500 light-years away.
Apr 2, 2014 — The two sides will continue to work together, however, in the operation of the International Space Station.
Apr 2, 2014 — Risks to astronauts on extended missions include vision impairment, weakened bones and radiation exposure. There are also psychological risks from facing danger while being stuck inside a small craft.
Mar 14, 2014 — In the story of astronaut William Pogue's quest for more contemplative time in space, commentator Barbara J. King finds inspiration for everyday life here on Earth.
Mar 11, 2014 — Cash prizes await "citizen scientists" who can improve algorithms that help NASA find and identify asteroids in our solar system, the agency says. A contest begins next week.
Mar 10, 2014 — NASA needs Russian rockets to reach the International Space Station, and Russia needs NASA's money to help finance operations.
Feb 28, 2014 — "It is just good luck," says astronomer Mark Thompson of the BBC's Stargazing Live. "The last time I have seen it this spectacular was probably 20 years ago."
Feb 26, 2014 — The space agency announces a stunning discovery, as the Kepler mission identifies 715 new planets that orbit 305 stars. The finding boosts the verified number of such planets by around 70 percent.
Feb 25, 2014 — Farmers in California face hard choices as a drought threatens to ruin their crops. A striking photo shows Northern California's Folsom Lake at only 17 percent of its capacity.
Feb 12, 2014 — Also: The Hatchet Job of the Year is announced; NASA collaborates on sci-fi series; Penguin India pulls book on Hinduism.