Vote Now! Top Space Stories of the Week - Jan. 22, 2012

Tiny Invisible Galaxy May Be Made Completely of Dark Matter

Vegetti et al.

Astronomers have discovered a whole dwarf galaxy made of invisible dark matter that is only detectable through its gravitational force. [Full Story]

NEXT: Mystery Surrounds Air Force's Secretive X-37B Space Plane Landing Plan

Mystery Surrounds Air Force's Secretive X-37B Space Plane Landing Plan

USAF/Vandenberg Air Force Base

The U.S. military's secret X-37B space plane is still circling Earth, nearly 10 months after its launch. When might it come down? [Full Story]

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