"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 ...

It’s one of the most enduring ideas about the formation of our solar system: Earth collided with a Mars-sized object, Theia, ...

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in ...

CREDIT: ALMA(ESO/NAOJ/NRAO)/M. McClure et al. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of ...

Analysis of the second confirmed interstellar comet to visit our solar system suggests that the alien body could be covered ...

Scientists have discovered a meteorite older than Earth, offering the earliest clues to how the Solar System formed and how ...

To our best of our understanding, the Moon formed from Earth following a colossal impact. A Mars-sized world we nicknamed Theia slammed and merged with the primordial Earth, throwing material into ...

About 4.6 billion years ago, a celestial cloud collapsed, paving the way for our solar system to form. Then, a nebula with strong gravitational pull took shape, kick-starting the birth of the sun. But ...

This illustration provided by NASA depicts the Europa Clipper spacecraft over the moon, Europa, with Jupiter at background left. (NASA/JPL-Caltech via AP) (CN) — The largest planet in our solar system ...

A small, icy traveler from deep space has just threaded its way through the inner Solar System, offering a fleeting but ...

Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.

Scientists studying samples from the Bennu asteroid located not too far from Earth continue to find clues as to how life ...