Miriam Kramer

A distant group of hot, young stars cause a cloud of hydrogen gas to glow a rosy red 7,300 light-years from Earth in the latest amazing view from a telescope in Chile.

A powerful scientific tool set to come online in 2015 could help scientists spot gravitational waves, ripples in space-time born from violent cosmic crashes light-years from Earth.

A new documentary trailer making its way around the Internet this week seems to make the case for a long-outdated theory about how the universe works.

NASA watched as a large, peanut-shaped asteroid flew past Earth in early February, and you can see the impressive images in a new video released by the space agency.

The sun erupted with a major solar flare on Tuesday (Feb. 25), an X4.9 solar flare that is the biggest sun storms of the year. See how a familiar sunspot triggered the massive solar storm here.

A full moon is rising for lovers on Valentine's Day and it will be a Snow Moon. If weather permits, look up on Friday (Feb. 14) to see the full moon shining brightly in the winter sky.

Astronomers may have found the oldest known star in the universe. The ancient star formed not long after the Big Bang 13.7 billion years ago, according to Australian National University scientists.

A probe orbiting Mercury has beamed more than 200,000 images to ground controllers on Earth, and it's still going strong.

The innards of an asteroid in space have been measured for the first time. Astronomers using a European Southern Observatory telescope have made precise measurements of Asteroid Itokawa's density.

An amazing new photo of Saturn's north pole puts the planet's odd hexagon-shaped jet stream and dazzling rings on display.

Japanese scientists are getting ready to launch a test of a space junk-cleaning tether, according to press reports.

Scientists using a powerful telescope in Chile have found an alien planet circling a star that is nearly identical to the sun in a star cluster 2,500 light-years from Earth.

Mars Express — the first European Space Agency spacecraft built to investigate another planet — has been snapping color and 3D images of Mars for 10 years.

An ultraprecise new galaxy map is shedding light on the properties of dark energy, the mysterious force thought to be responsible for the universe's accelerating expansion.