Electric propulsion is being increasingly used on space missions and could ultimately replace thrusters using chemical rockets.

For a few months, Earth had a second moon — a tiny asteroid that may have been a piece of our own Moon ...

For a brief, but exciting, time last year, Earth had two moons. A small asteroid lingered close to our planet in its orbit ...

NASA will brief media at 11 a.m. EST Wednesday, Jan. 29, to provide an update on science results from NASA's OSIRIS-REx ...

Generally, the nights of and near the new moon – when the moon is not illuminated – are better for most stargazing experiences. Here are the dates of new moons this year.

Earlier this month, the Minor Planet Center announced the discovery of an unusual asteroid close to Earth. Turns out, it was ...

Lee esta historia en español aquí. The near-Earth object was likely ejected into space after an impact thousands of years ago ...

Everyone knows about the mass extinction that ended the Age of Dinosaurs. About 66 million years ago, a seven-mile-wide ...

Why hadn't we noticed it sooner? - NASA and all of humanity failed to locate this asteroid. They are small in size and the ...

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The New Year starts with a bang as Quandrantids peaks on Jan. 2 and 3. This is one of the largest meteor showers of the year, ...