According to Harvard astrophysicist Avi Loeb, the comet 3I/ATLAS likely weighs over 33 billion tons. This startling estimate was derived from an analysis of the object's trajectory, where Loeb ...

How frequently does a traveler from another star system sweep through our galactic neighborhood, and astronomers rush to the telescope? Not until recently was the answer: hardly ever. In fewer than ...

A recent study has sparked intrigue by suggesting the existence of a mysterious object from beyond our solar system behaving ...

When 1I/'Oumuamua was first spotted in 2017, astronomers quickly determined that it came from outside the solar system. But although it was initially classified as a comet from another star system, it ...

The Solar system is bigger than NASA thought. There are a lot of huge objects at the edge of the solar system that we have not seen but can indirectly estimate. When astronomers say Kuiper Belt Object ...

In 2017, astronomers at the Pan-STARRS1 observatory looking for near-Earth asteroids spotted an object as it hurtled past our Sun at 38.3 kilometers per second (23.8 miles per second). The rest of ...

Our solar system may have an outer “edge” just outside the orbit of Pluto, astronomers announced recently. Their results suggest that early in the history of the solar system, some event stripped away ...

Eleven objects found at the extremities of the solar system could mark the location of a 'Kuiper Belt 2.' When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

Most of our knowledge about the Solar System’s formation and evolution comes from the study of extraterrestrial rock samples called chondritic meteorites. These rocks, which are fragments of asteroids ...