"During the early solar system's game of cosmic billiards, Earth was struck by a neighbor,” said Dauphas. “It was a lucky shot. Without the moon's steadying influence on our planet's tilt, the climate ...

Little is known about the long-destroyed moon-forming planet, Theia. But it may have been born in the inner solar system—just like Earth—a new study suggests ...

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

New research shows that Theia, the planet that collided with Earth and formed the Moon, was a rocky world born closer to the ...

The asteroid known as 2024 YR4 is out of sight yet still very much on scientists’ minds. The building-sized object, which initially appeared to be on a potential collision course with Earth, is ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A newly discovered house-size asteroid is set to make a close, yet harmless approach to Earth ...

Scientists traced the Moon's parent planet Theia to the inner Solar System, solving a 4.5-billion-year mystery.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A small space rock ...

Over the past few days, an astronomical piece of space news has been circulating around the internet: NASA purportedly confirmed that Earth has acquired a second moon that will stay with us until 2083 ...

Astronomers recently detected a stray quasi-moon in our planet’s orbit, but it's hardly the first stowaway to hang out around Earth. Unlike the Earth's moon, quasi-moons are not gravitationally bound ...