Space Telescope Science Institute

NASA researchers measure mass of star using Einstein's Theory of Relativity

An international team of astronomers has used the Hubble space telescope to measure the mass of a star by employing Albert Einstein's Theory of Relativity.

Scaling new heights in astronomy: NASA discovers snowcapped mountains in Pluto

Cthulhu Regio stretches nearly halfway around Pluto's equator, starting from the west of the great nitrogen ice plains known as Sputnik Planum.