This is roughly as close to Earth as today's geosynchronous communications and weather satellites, and about 10 times closer than the Moon is today. Because the force of gravity is stronger at ...

Because these planetesimals were larger than the boulders, they had strong enough gravity to pull neighboring ... changes the orbit of the final Earth-moon system. Planetary scientists need to find an ...

NASA’s Lunar Trailblazer is gearing up for launch, riding on a SpaceX Falcon 9 as part of the IM-2 mission. This small yet ...