The eyes of every astronomer widened this year when an interstellar traveler was discovered in our solar system.

How Did the Solar System Form? The tale of our sun may begin with another star: a predecessor whose fiery death brought about the birth of our solar system.

When most of us learn about the solar system, it seems like a pretty well-ordered place. Our Sun formed first, about five billion years ago, and the planets appeared a little later. As a very ...

Researchers have laid out a new, comprehensive theory for how the solar system formed — inside the bubble of a long-dead, giant star.

Since the first discovery of planets beyond the solar system in 1995, more than 6,000 exoplanets have been identified. Many ...

NASA's spacecraft Lucy has already started its four-billion-mile odyssey to the "fossils" of the solar system, looking to solve the mysteries of our cosmic home ...

The recipes for solar system formation are getting a rewrite Oddball exoplanets raise new questions about how solar systems form ...

New study suggests Jupiter’s formation divided Solar System in two A solid core would have then started adding gas to create the present planet.

The first observed interstellar object blazed through our solar system more than two years ago. Astronomers scrambled to observe the object in October 2017 before it disappeared, and their ...

A surprisingly large planet orbiting a small star defies the conventional wisdom about how planets are born. But a dark-horse idea from more than 20 years ago could explain it.