Are Uranus and Neptune rock giants and not ice giants?

View larger. | Artist’s depiction of the interior of Uranus as either an ice giant (left)…

Dwarf planet Ceres discovered 225 years ago today

Dwarf planet Ceres’ Occator crater in false color showing surface composition via NASA/ JPL-Caltech/ UCLA/ MPS/…

What Stranger Things gets right about wormholes : NPR

This computer illustration shows an Einstein-Rosen bridge, also known as a wormhole. Wormholes feature heavily in…

Long-duration M7.1 solar flare erupts from AR 4324

A Type IV and Type II (estimated velocity of 893 km/s) radio emissions were associated with…

Three supermassive black holes have been spotted merging into one

Supermassive black holes occasionally devour or merge with other black holes MARK GARLICK/SCIENCE PHOTO LIBRARY Three…

Curiosity Sends Holiday Postcard from Mars

NASA’s Curiosity Mars rover used its black-and-white navigation cameras to capture panoramas at two times of…

Star that seemed to vanish more than 130 years ago is found again

An image captured by a telescope at the Grasslands Observatory in Arizona. The “x” is where…

The century-long hunt for the gigantic meteorite that vanished

It all started with an overheard conversation between some camel herders. The year was 1916, and…

ESA – Nature’s fireworks from space

As she flew 400 km above Earth at hypersonic speed, NASA astronaut Jeanette Epps caught a gigantic spark with blue and red flashes shooting…

ESA – Fireworks from space

As she flew 400 km above Earth at hypersonic speed, NASA astronaut Nichole Ayers caught a…