Volcanic 'fire fountains' erupting from the lunar surface, similar to what occurs in Iceland today, most likely were fueled by carbon monoxide gas, a new study shows.
As we rapidly approach Cassini's thrilling final stage of its mission, the list of 'final' events is gradually shrinking. Next on the NASA spacecraft's final list is Dione -- coming within 295 miles of the Saturn moon's surface on Monday.
In new observations beamed back from Cassini, Saturn's icy moon Tethys has decided to show off its mysterious stripes.
What tiny satellites could take a ride over to Europa? Here are five feasibility studies being considered to hitchhike on a NASA mission.
In a new portrait, imaged shortly before NASA New Horizons punched through the dwarf planet's neighborhood on Tuesday, Pluto and largest moon Charon hang serenely in the dark.
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.
Four out of the five moons of Pluto have been discovered in the last ten years -- two of them after the New Horizon's spacecraft began its 9-and-half-year journey to the dwarf planet. Could there be more uncharted moons and hidden dangers lurking?
Saturn’s faint outermost ring cuts a massive swath as it circles around its home planet, spanning an area of sky nearly 7,000 times larger than Saturn itself.
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