A meteorite from Mercury?

Stefan Ralew /

The First-Ever Meteorite from Mercury?

February 1, 2013                                                                | Is this a piece of the innermost planet? Northwest Africa 7325 is a meteorite like no other — in fact, it’s a near-perfect geochemical match to the surface of Mercury. > read more

Amateurs Help Find Multi-Planet System

January 29, 2013                                                                | Amateur astronomers perform a crucial role in detecting exoplanets by a technique called microlensing, including the most recent discovery of a multiple-planet system. > read more

(Really) Cool View of Andromeda Galaxy

January 29, 2013                                                                | Nearing the end of its mission, ESA’s Herschel Space Observatory has delivered a highly detailed map of extremely cold gas and dust in the iconic Andromeda Galaxy. > read more

Dead Stars: Good Exoplanet Targets?

January 28, 2013                                                                | White dwarfs can have stable habitable zones for a few billion years, and planets with Earth-like atmospheres might be much easier to detect around these stellar remnants than normal, hydrogen-fusing stars. > read more

Water Once Flowed Beneath Martian Surface

January 31, 2013                                                                | Fossilized wrinkles in impact craters suggest once again that water might once have flowed on Mars — this time, beneath the surface. > read more


Mercury Meets Mars

January 31, 2013                                                                | Mercury and Mars, the two smallest planets, appear spectacularly close to each other shortly after sunset on Thursday and Friday, February 7th and 8th. > read more

Mercury in February 2013

January 31, 2013                                                                | Mercury has a fine evening apparition in February 2013, featuring an extraordinarily close conjunction with Mars. > read more

Tour February’s Sky by Eye and Ear!

February 1, 2013                                                                  | Evening skies feature two bright planets: Mercury, which lurks low in the west after sunset around the 16th, and Jupiter, which reigns high in the southern sky all month long. > read more


Globe at Night in 2011

Globe at Night

Take a Stand Against Light Pollution!

January 4, 2013                                                                | Join a worldwide campaign to measure the darkness of night skies everywhere. From February 1st to 9th, “Globe at Night” is a fun, easy, and worthwhile activity for you and your family. > read more

This Week’s Sky at a Glance

Before sunrise

This Week’s Sky at a Glance

February 1, 2013                                                                  | Mercury and Mars have a challenging close conjunction low in the sunset. The gigantic Winter Hexagon rides high. And the waning Moon passes Saturn in the dawn. > read more

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