New evidence shows that, far beyond Pluto, there may exist a hypothetical planet referred to as Planet X or Planet Nine.

There are no confirmed exomoons, moons orbiting distant exoplanets in other solar systems. There are a few candidates, but ...

The Nov. 9 eruption, an X1.7 flare that peaked around 2:30 a.m. EST (0730 GMT) produced a strong (R3) radio blackout and an ...

Last week, four lasers were projected into the sky above the European Southern Observatory (ESO) Paranal site in Chile. The ...

NASA and Lockheed Martin’s X-59 "quiet" supersonic plane flew for the first time in October. It’s a major step towards ...

Discover what could happen if Planet X entered our solar system unexpectedly. Government shutdown reaches its 40th day as ...

Created using data from two extensive surveys, this spectacular radio image of the galactic plane of the Milky Way provides valuable insights into the birth and death of stars.

NASA reveals that a particle wind powers pulsar J1023, aligning optical and X-ray polarization, which calls existing models ...

Avengers: Doomsday promises to be an epic cosmic adventure for Doctor Doom, but there are many space-faring heroes who aren't yet returning.