The Runaway Star That's Racing Full-Throttle Out of Our Galaxy

From Discover Space:

I like the Milky Way. I dare say it's my favorite galaxy, being home and all. But a blue star called HE 0437-5439 is in one big hurry to leave. The star is zooming away from the Milky Way's center at 16 million miles per hour, three times faster than our own sun glides across the galaxy. Astronomers had spotted the hasty traveler before--it's one of 16 known "hypervelocity" stars.

Read the whole article