Add Yahoo as a preferred source to see more of our stories on Google. On January 2, 2004, NASA's Stardust spacecraft flew by comet Wild 2 to collect some comet dust and bring it back to Earth.

In the fall of 2023, Unistellar observers joined forces with the Association Française d’Astronomie (AFA) to take another close look at a familiar visitor: Comet 103P/Hartley 2. This tiny but famously ...