The question of our unusual ... Earth's gravity. Astronomers Darren Williams and Michael Zugger of Pennsylvania State University have crunched some numbers and found that the gravitational capture ...

the small satellite mission will use the gravity of the sun, Earth, and moon over several months to gradually line up for capture into lunar orbit. NASA's Lunar Trailblazer arrived in Florida ...

When teachers explain ocean tides, they frequently describe how the moon's gravity pulls on Earth and all of its water. This, they often say, leads to a gravitational imbalance, which stretches ...