Astronomers detect comets outside the Solar System
Using NASA's Kepler Space Telescope, MIT scientists helped by amateur astronomers have spotted the dusty tails of six exocomets, comets outside our solar system, orbiting a star 800 light-years from Earth. The discovery marks the first time when objects as small as comets were detected using the transit method, generally used to find exoplanets by measuring dips in stars' brightness.