A black asteroid as big as an aircraft carrier zoomed past Earth on Tuesday, delighting astronomers who trained telescopes on the ancient body in hopes of learning more about its composition and origin. With a diameter estimated at 400 meters, or about a quarter of a mile, Astero
A black asteroid as big as an aircraft carrier zoomed past Earth on Tuesday, delighting astronomers who trained telescopes on the ancient body in hopes of learning more about its composition and origin.
With a diameter estimated at 400 meters, or about a quarter of a mile, Asteroid 2005 YU 55 is the biggest asteroid to make a close pass by Earth since 1976.