Advanced space travel relies on a fundamental understanding of the restricted three-body problem (RTBP), in which one of the three bodies—typically a spacecraft—is so small that its gravity doesn’t ...

From the first satellite in orbit, to the first human in space, to the first steps on the moon, the United States government has always framed space exploration as a race. As U.S.-China space ...

Outer space is massive, and throughout the universe, everything is in motion. The Earth orbits around the Sun, the Moon orbits around the Earth, the Sun orbits around the center of the Milky Way, and ...