A group of comets with unexplained movements presents a quandary D avide Farnocchia hunts down and tracks asteroids, and ...

Water. All life on Earth requires it in some way or another, and it's hard to miss that roughly 70% of our planet's surface is covered in the stuff. Thus, understanding where Earth's water came ...

list=PLTiv_XWHnOZpvw5DLyh1xYARytUswtbJP For years, experts compared these ratios in comets and asteroids to the water found in Earth’s oceans. Jupiter-family comets, which likely formed beyond ...

New research indicates that the water on Comet 67P/Churyumov–Gerasimenko has a molecular signature closely matching that of water found in Earth’s oceans. This discovery revives the ...