Visualization of the Sun-Earth Lagrange points. Orbital mechanics is a fun subject, as it involves a lot of seemingly empty space that’s nevertheless full of very real forces, all of which must be ...

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 ...

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 ...

India’s Aditya-L1 probe will arrive in a few days at a patch of space between Earth and the sun, almost a million miles away. The location is remote yet isn’t very lonely. Four active spacecraft are ...