No satellite could revolve in a shorter time than it takes its primary to rotate: this condition is violated by Phobos, the inner satellite ... implies that all the planets were formerly gaseous ...

"We have been waiting for 10 years to confirm that our finely tuned operations of the telescope would also allow us to access ...

All planets are made of gas, ice, rock and metal, and models of how planets form usually assume that these materials don't ...

What if water and hydrogen don’t stay separated inside planets like Earth and Neptune? New research from UCLA and Princeton ...

Inner planets are the four planets closest to the Sun: Mercury, Venus, Earth and Mars. They are collectively characterized by a solid surface and small size relative to the outer gas giants.

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to Earth. Astronomers have revealed new ...

Moon, Mercury, Rahu, Sun, Saturn, and Venus—will align in Pisces, impacting emotions, spirituality, and karma until April 13, ...

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 ... planetesimal accretion in the inner disk, while mini-Neptunes develop ...

The detection of CO 2 offers clues as to how distant planets form, with the observations providing strong evidence that these four giant planets formed in much the same way as Jupiter and Saturn ...

Here's an overview of the best new watches to drop at Watches and Wonders—the world's biggest watch fair—in Geneva, ...

Get closer to our solar companions with the best telescopes for seeing planets, just in time for February's fantastic planetary parade. Want to focus your stargazing on our cosmic neighbors ...