Astronomers have discovered powerful magnetic fields steering gas, dust, and star formation in a dramatic galaxy merger.
"Five significant threat vectors" are of concern to U.S. Strategic Command (STRATCOM), Adm. Richard Correll,  said on Wednesday at the Nuclear Deterrence ...
Learn how to calculate gravitational forces on a spacecraft from Earth and the Moon! Step-by-step physics tutorial covering force equations, vectors, and practical examples for orbital mechanics.