An object captured on film by the Hubble telescope has astronomers scratching their heads. The body, named P/2010 A2 after it was discovered in early January, shares comet-like traits, but the head is x-shaped and seems to be disconnected from its tail, reports the New York Daily News.
The principal investigator's theory: "Two small and previously unknown asteroids recently collided, creating a shower of debris that is being swept back into a tail from the collision site by the pressure of sunlight." (More Hubble Space Telescope stories.)