When is a comet not a comet? Rosetta finds out
Thursday, October 14, 2010 - 04:20
in Astronomy & Space
It was a case of celestial hit and run. Two asteroids, both in the wrong place at the wrong time. The result: one big trail of debris and a case of mistaken identity. Now, however, ESA’s comet-chaser Rosetta has unravelled the truth.