Even though humans have pondered the moon since the first of us looked skyward, there is still much we don't know about it.

This is consistent with the Lunar Magma Ocean hypothesis — known as the LMO — which holds that the moon’s crust formed as magma cooled roughly 4.4 billion years ago. The moon was much closer ...

Our planet's Moon might look dead and stagnant from our vantage point here on Earth, but a new study suggests it was moving ...

The moon quickly began to cool. Most of the lunar magma ocean solidified almost right away by geologic standards—about a single millennium. But once about 80% of the magma had solidified, a crust of ...

NASA's Juno spacecraft has discovered a giant volcanic hot spot on the surface of Jupiter's hellish moon Io. The eruptions in ...

Another explanation is that, following the impact that formed the basin, a huge ocean of metal-rich magma pooled inside of the lunar crust and solidified into a dense slab.

WASHINGTON - The Grand Canyon in Arizona is one of Earth's natural wonders, carved out over millions of years by the gradual ...

A NASA spacecraft orbiting Jupiter has just witnessed some of the most extreme volcanic eruptions ever seen in the solar system, coming from a giant underground magma chamber on the "tormented" Jovian ...

as well as the hypothesis that the lunar surface early on was an ocean of magma, Kring added.