A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

For years, astronomers have been questioning whether there is an unseen planet hiding in the furthest reaches of our solar system? Now, a team of scientists from Rice University thinks we may be ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our solar system.

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

16, 2025 — Why do comets and their meteoroid streams ... of one of the most common types of planets outside of our solar system, according to a new ... Webb Telescope Captures Its First Direct ...

A new look through decades-old data has unveiled some of the most compelling evidence yet of a hidden ninth planet in the far reaches of our solar system, far beyond the bounds of Neptune and the ...

An arcminute is used by scientists to measure angles in the sky, like how far apart things appear when you look up ... several mysteries within our solar system. In a breakdown of Planet Nine ...

Vassy Kapelos asks astrophysicist Jesse Rogerson about the powerful solar flares that erupted on the Sun last week and how ...

The plains house the aptly named Very Large Array (VLA)—a radio telescope made of 27 different antennas, each of which looks ...

Most of these extrasolar planets are much closer to their host stars than the innermost planets of our solar system are to the sun. (Credit: Batygin and Laughlin, ) Jupiter may have swept through the ...