According to researchers from Australia National University, the reason humanity has found no evidence of alien life may be because it is extinct

A fine meeting of all five naked eye planets greets dawn skywatchers in early February as Mercury, Venus, Mars, Saturn and Jupiter are all visible at once. Watch as the Moon visits all five, and follow the planets through 2016.

In a major step towards flight, engineers at NASA's Michoud Assembly Facility in New Orleans have finished welding together the pressure vessel for the first Lunar Orion crew module that will blastoff in 2018 atop the agency's Space Launch System (SLS) rocket.

The astronomer known worldwide for vigorously promoting the demotion of Pluto from its decades long perch as the 9th Planet, has now found theoretical evidence for a new and very distant gas giant planet lurking way beyond Pluto out to the far reaches of our solar system.

We are all familiar with how long a day is here on Earth. But how long is a day on the other planets of our Solar System?

Reader images of the January 19th, 2016 occultation of the bright star Aldebaran by the waxing gibbous Moon. the event was visible across North America, the northern Atlantic, and Western Europe. Readers responded with Vines, pics, videos and more!

The first Zinnia flower to bloom in space is dramatically catching the sun's rays like we have never seen before - through the windows of the Cupola on the International Space Station (ISS) while simultaneously providing a splash of soothing color, nature and reminders of home to the multinational crew living and working on the orbital science laboratory.

The Plum Pudding Model, which was devised by J.J. Thompson by the end of the 19th century, was a crucial step in the development of atomic physics

SpaceX came much closer to sticking the landing of their Falcon 9 rocket on a tiny droneship at sea than initially thought, as evidenced by a dramatic video of the latest attempt to recover the booster by making a soft ocean touchdown on Sunday, Jan. 17, after successfully propelling a US-European ocean surveillance satellite to low Earth orbit.

Don't miss a fine occultation of the bright star Aldebaran by the waxing gibbous Moon on the evening of Tuesday, January 19th, visible across North America and the UK/western Europe.

A SpaceX Falcon 9 rocket successfully launched the NASA/NOAA/European Jason-3 sea level rise reconnaissance satellite a short while ago today, Sunday, Jan. 17, from Vandenberg Air Force Base into a polar orbit around the Earth.

The joint NASA-European ocean surveillance satellite named Jason-3 is poised for blastoff from SpaceX's California launch pad on Sunday, Jan. 17 - followed immediately by another Falcon 9 rocket recovery landing on a barge at sea. The weather forecast is outstanding! And you can watch all the excitement live.

In a major advance towards the dream of rocket reusability, SpaceX successfully test fired the first stage engines of the Falcon 9 booster they successfully recovered last month - following its launch to the edge of space and back that ended with a history making upright landing at Cape Canaveral.

A shuttle will soar again from American soil before this decade is out, following NASA's announcement today (Jan 14) that an unmanned version of the Dream Chaser spaceplane was among the trio of US awardees winning commercial contracts to ship essential cargo to the International Space Station (ISS) starting in 2019.

People have often wondered what Earth would look like if it had Saturn's rings. JPL's Kevin Gill lets them know with his new photoseries