Scientists have long puzzled over how gas planets like Jupiter and Saturn got to be so big -- now they think pebbles may be the answer.
The newly discovered planet called 51 Eridani B is about twice the mass of Jupiter, and orbits a star about 97 light-years from Earth.
What tiny satellites could take a ride over to Europa? Here are five feasibility studies being considered to hitchhike on a NASA mission.
You don't get to meet your double every day, but Jupiter and the sun share the same galaxy as their very own doppelgangers.
For the next few nights, be sure to make a special effort to go outside at twilight and look West -- if you live in the Northern Hemisphere and have clear skies.
Europa is an ice-covered moon orbiting Jupiter that likely an ocean underneath. Perhaps that ocean contains life. Perhaps it doesn't. But we're not going to know for sure until we send a probe there to check things out.
Many thunderstorms in Saturn's atmosphere could be driving the gas giant's vast polar cyclones, according to new simulations inspired by observations from NASA's Cassini spacecraft.
NASA on Tuesday selected nine science instruments it believes will best address the burning question about whether Jupiter’s ocean-bearing moon Europa has indications of life.
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