Scientists have discovered that Uranus gives off more heat than it takes in from the Sun, revealing that the planet still ...

By comparison, the diameter of Earth's moon is about 2,160 miles (3,475 km). Because of its greater concentration of rock, which is denser than ice, Eris has about 25% more mass than Pluto.

The findings uncover details of the internal structure of the moon that were previously hidden. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Earth's internal temperature increases between the boundary of the upper mantle and the bottom of the lower mantle, ranging from around 1,800 to 6,700 degrees Fahrenheit (1,000 to 3,700 degrees ...

A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding could upend what’s known of their evolution.

Modeling the moon's internal structure, the researchers determined that this differential could be explained if the mantle on the near side of the moon was between 180–360 degrees Fahrenheit ...