A new image shows the growing tail of a comet from another star system streaking across our solar system. The image of comet ...

Astronomers have discovered the Methuselah of stars — a denizen of our Solar System's neighborhood that is at least 13.2 billion years old and formed shortly after the Big Bang. “We believe ...

Discovered last month by a telescope in Chile, the comet known as 3I-Atlas is only the third known interstellar object to ...

Could sunset in our solar system once have looked very different? A new study suggests our sun may once have had a binary companion.

Before the planets in our solar system formed or the Sun turned on and started shining, two other stars had to die. Their deaths and later collision would seed the area where our area with many of ...

When planetary scientists look to other stars for planets beyond Earth, they don’t often turn up much that resembles our solar system. Whether it’s because of star size, detection method, or ...

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is ...