Discover how scientists have used iron isotopes to determine the likely origin of the Mars-sized planet named Theia.

New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon ...

The next full moon is in December, the last full moon and last of three "supermoons" in 2025. The first supermoon of 2025 was ...

To our best of our understanding, the Moon formed from Earth following a colossal impact. A Mars-sized world we nicknamed ...

"The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner solar system.

The sun’s gravity would be pulling the moon away from Earth on November 20, 2025, at a distance that it had never been in the ...

Is there a full moon tonight? Here's what to know about today's special moon phase and when to look up for the next meteor ...

Today, Nov. 22, 2025, the moon is 2 days old and is in the Waxing Crescent phase of its lunar cycle. It is 5% illuminated.

About 4.5 billion years ago, a colossal impact between the young Earth and a mysterious planetary body called Theia changed everything—reshaping Earth, forming the Moon, and scattering clues across ...

We're on day five of the lunar cycle, which means the moon is working on getting bigger every night. There will be more ...

Understanding the moon’s seismic activity is critical to the success or failure of future lunar missions. Lunar seismic ...

“Impact flashes on the moon are very common,” University of Colorado Boulder astrophysical and planetary sciences professor Paul Hayne said. “In fact, they happen more or less every night, and it’s a ...