The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests.

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

But as far as we know, no other bodies in the solar system exhibit ... But without any other nearby planets exhibiting plate tectonics to compare Earth's system to, it's hard to know precisely ...

one which can offer superb views of the other bodies in the solar system. But which one to choose? We've got you covered with our guide to the best telescopes for seeing planets. Now's a great ...

"Uranus and Neptune, two very distant ice giant planets out in our solar system, are also there in ... Saturn will appear as a yellowish-white body with moderate brightness, according to Space.com.

A report published in Science Advances details when the asteroid could collide with Earth and the destruction it would cause.

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system ... bodies that are heavier than ...

"Uranus and Neptune, two very distant ice giant planets out in our solar system, are also there in the sky," Dyches said. "But they are very faint." MORE: This is how close NASA's Parker Solar Probe ...