Given just how big space is, the solar system seems like it shouldn't be too mysterious. But there are actually plenty of questions that took years to solve.

Using gravitational microlensing, scientists have discovered a rare, large planet at the edge of the Milky Way. The planet is ...

The Vera C. Rubin Observatory is expected to find millions of unknown objects in our solar system, and perhaps even a ...

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

Mark your calendars, place your bets, grease your palms, blink open that third eye, and ready your wishes, my babies ...

Pluto is the tiniest planet in our solar system with a diameter of roughly 2,377 kilometers, making it even smaller than our ...

Only eight planets call our solar system home. Or there might still be nine if some astronomers are correct about an as-yet undiscovered large body out past Neptune.

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

Scientists may have found a new Tatooine-like planet outside the solar system that orbits two failed stars. Located 120 light years away, the planet appears to take an unusual path around two ...

Dec. 11, 2023 — Asteroids offer valuable windows into the early solar system, given that they are remnants of planetary embryos that failed to form into planets. A recent analysis of samples ...

The hypothesized planet’s orbit around the sun would likely take around 10,000 years, California Institute of Technology astronomers Mike Brown and Konstantin Batygin told Science.

Astronomers have revealed new research showing that millions of new solar system objects are likely to be detected by a brand-new facility, which is expected to come online later this year.