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The International Space Station conducted a spacewalk this week to mark 15 years in space. Three people who've walked in space share their miraculous — and miserable — experiences.

The photos come from a camera on a satellite, once called "GoreSat" after former Vice President Al Gore, who initially proposed the project in the late 1990s.

When a probe skimmed past the dwarf planet in July, researchers expected to see a cold, dead world. New results published today show that Pluto is an active place.

But, using images from the Hubble Space Telescope, scientists have learned the great storm is putting up a fight because it is now shrinking at a slower rate.

Pluto's atmosphere has a blue haze, in a new photo from the New Horizons probe. But the particles causing that color are probably gray or red — and the planet's surface has red ice.

A new study suggests the Red Planet had some blue on it about 3.5 billion years ago.

One reason is that it would take the Curiosity rover about a year to get there, even with no obstacles and no traffic. But the other reason might surprise you.

The women plus NASA's chief scientist came to talk space exploration, women in STEM, and common misconceptions. Oh, and which foods they wished they had in space.

New images taken by the Dawn spacecraft have "transformed what was so recently a few bright dots into a complex and beautiful, gleaming landscape," a NASA mission director says.