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Of the more than 1,200 planets in the latest trove turned up by NASA’s Kepler Space Telescope, about half seem to be rocky, like Earth.

The spacecraft has detected the nearest thing to Earth yet discovered — a planet that’s a bit bigger and squarely inside the “habitable zone” for life.

Petersburg residents are used to cloudy skies. So a night clear enough to view the stars is special.

Space is a dangerous place. That message resonated again on Monday, when the Russian Federal Space Agency announced that a team of experimental geckos tasked with copulating while in orbit did not survive their journey.

What shape is the moon? When it’s full, we’d all agree that it looks perfectly round. But careful measurements by a team of scientists have shown that’s not the case.

Physicists have used the world’s most powerful laser to zap diamonds. The results, they say, could tell us more about the cores of giant planets.

This summer, the moon will reach “super” status not once, not twice, but three times — and the first time happens Saturday night.

An audacious quest to reconnect with a vintage NASA spacecraft has suffered a serious setback and is now pretty much over.

A gung-ho group of space enthusiasts has started the process of putting a vintage NASA spacecraft on a new flight path, so that this venerable piece of hardware will be able to do useful science once again.

The Dragon V2, as it’s called, looks like a giant shuttlecock with feet. It’s set to be the first all-new U.S. spacecraft to take astronauts into orbit since the Space Shuttle took flight in 1981.