SpaceX crews are preparing to launch a Falcon 9 rocket Thursday morning from Florida’s Space Coast. SpaceX is planning to ...

NASA selects two proposals for missions to observe X-ray and far-infrared wavelengths of light from space for additional ...

Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

The Hubble Space Telescope has captured two tangled galaxies, whose interactions have caused knots to form in the ...

An international team of astronomers has identified three ultra-massive galaxies—each nearly as massive as the Milky ...