Eighth planet found in faraway solar system, matching ours

NASA nails test on Voyager spacecraft, 13 billion miles away

Self-taught rocket scientist eyes Monday for new launch date

Good night, night: Light pollution increasing around globe

New study: Streaks on Mars sign of flowing sand, not water

Study: thunderstorms larger and more frequent

WATCH: NASA captures 20 years of seasonal changes of home planet

Close new Earth-size world, where year lasts under 10 days

The science of water and the body

Space Delivery: Astronauts get ice cream, make-own pizzas

Stellar encore: Dying star keeps coming back big time

Scientists witness huge cosmic crash, find origins of gold

Science Says: Era of monster hurricanes roiling the Atlantic

AP Explains: Why gravitational wave researchers won a Nobel

NASA's Cassini spacecraft burns up over Saturn

2 Americans, Russian head for International Space Station

NASA's Saturn-orbiting Cassini spacecraft faces fiery finish

Eclipse-viewing advice from a man who knows

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