Rosetta Spacecraft's Comet Water Discovery: What It Means for Earth
Friday, December 12, 2014 - 12:30
in Astronomy & Space
Where did Earth's water come from? Comets? Asteroids? New data from the Rosetta spacecraft orbiting Comet 67P/Churyumov-Gerasimenko shows that comets — once thought responsible for seeding Earth with water — might not have delivered water to the planet.