You may remember that an object plunged into Jupiter. The blemish it left behind has, within three weeks, grown to the size of the Earth!

This past week, astronomers have discovered a new moonlet in Saturn’s orbit. The small moon is about a quarter of a mile in diameter and first photographed from the Cassini. 1000 light-years away, astonomers also found the first occurance of a planet orbiting backwards – ie. in the direction opposite to its star’s rotation – possibly due to a near-collision between star and planet. And by 2020 NASA says it should be able to detect 90 percent of potential collisions and hazards nearing earth’s orbit. These potential hazards are defined as those objects larger than 3 football fields.

Via BBC
Via Space.com
Via JPL’s Asteroid Watch