OSIRIS-REx flies on as OSIRIS-APEX to explore its second asteroid

After seven years in space and over 4 billion miles traveled, NASA's OSIRIS-REx mission successfully collected and delivered the first U.S. sample from a near-Earth asteroid. Yet, after all this time and travel, the spacecraft ...

Exactly how massive is the Milky Way?

How do you weigh a galaxy? It's an astronomical challenge, particularly if it's the galaxy you call home. It turns out there are several ways to get a handle on the mass of the Milky Way, and a recent study posted on the ...

Second ring found around dwarf planet Quaoar

A large international team of astronomers has discovered that the dwarf planet Quaoar is circled by a second ring. In their study, accepted for publication in the journal Astronomy & Astrophysics, the group discovered the ...

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