The asteroid will be be 3.6 million miles away when it passes the Earth.
The Kepler spacecraft lost the second of four wheels that control the telescope's orientation in space.
New analysis of lunar rock suggests that water on the Moon and water on Earth have a common source: ancient meteorites.Environment,Research,Astronomy,Comets,Earth,Lunar water,Meteorite,Moon,NASA,physics,Planetary science,Space,Water,Roni Jacobson
The eye of the cyclone is an enormous 1,250 miles across.
