Don Yoemans, head of NASA's Near Earth Object monitoring program, holds a model of his favorite near earth object--an asteroid that is really several kilometers wide. This one is not scheduled to make impact with the earth, but it will pass by "the neighborhood." (Krissy Clark)

Apocalypse When?

Don Yoemans, head of NASA's Near Earth Object monitoring program, holds a model of his favorite near earth object--an asteroid that is really several kilometers wide. This one is not scheduled to make impact with the earth, but it will pass by "the neighborhood."

Credit: Krissy Clark