Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 ...

Voluminous clouds of cosmic dust permeate our galaxy, but only recently has software allowed detailed observations of the ...

or the energized particles that emerge in a steady stream from the sun. Both groundbreaking missions promise to reveal previously unseen and unknown aspects of our solar system and galaxy. “These ...

That's far faster than our slowpoke Sun, which orbits the center of our galaxy at about half a million miles per hour.

A planetary alignment is where several planets assemble on one side of the sun. Galaxy gazers can observe the event by looking up into dark skies around 45 minutes past sunset. The sun dips down ...

As well as moving around the Sun, the Sun and Earth are orbiting around the dense center of our galaxy at some 447,000 miles per hour (200 km/s). Our galaxy, in turn, is moving relative to the ...