Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

Comets and asteroids preserve the building blocks of our solar system and should help explain its origin. But there are unsolved puzzles. For example, how did icy comets obtain particles that formed ...

One of the biggest puzzles about our sun is a strange one: you might think that it would be hottest right at the surface, but in fact, that isn’t the case. The corona, or the sun’s outer atmosphere, ...

Scientists are closely monitoring the interstellar object 3I/ATLAS as it moves across our solar system. The object could be ...

Astronomers around the globe are closely tracking a rare interstellar visitor: object 3I/ATLAS. First spotted in early July as it raced toward the Sun from deep space, it marks only the third ...