1I/’Oumuamua is the first detected interstellar interloper. We test the hypothesis that it is representative of a background population of exo-Oort cloud objects ejected under the effect of post-main ...

The chunk of space rock that killed the nonavian dinosaurs may have been a piece of a comet that Jupiter's gravity kicked onto a collision course with Earth. A new study suggests that the ...

The Oort cloud represents the very edges of our solar system. The thinly dispersed collection of icy material starts roughly 200 times farther away from the sun than Pluto and stretches halfway to our ...

An accidental discovery might change how we think about one of the most mysterious structures in our solar system. The Oort Cloud, a large expanse of icy bodies revolving around the sun at a distance ...

A dazzling fireball that ended its cosmic journey over central Alberta, Canada could change astronomers' understanding of how the solar system formed 4.5 billion years ago. Caught on camera on Feb. 22 ...

The nitrogen in the atmosphere of Saturn’s moon Titan seems to have gotten its start as ammonia ice in the early solar system. The finding suggests that the essential building blocks of Titan formed ...

For decades, scientists have theorized that beyond the edge of the solar system, at a distance of up to 50,000 AU (0.79 ly) from the sun, there lies a massive cloud of icy planetesimals known as the ...

Jupiter kicked it toward Earth. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The chunk of space rock that killed the nonavian dinosaurs may ...