Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

For a long time, Earth’s ending seemed settled. In about five billion years, the sun will swell into a giant, the inner Solar ...

An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar System and is ...

Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...

A rocky cigar-shaped object detected in space last month came from another solar system, astronomers said Monday as they confirmed an unprecedented observation. The discovery may provide clues as to ...

The study, published in Science Advances, focuses on two elements that are essential for life as we know it: nitrogen and phosphorus.