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

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

Asteroids that orbit close to the Earth inevitably cause us some anxiety due to the even remote possibility of a collision.

A new study suggests that a planet-sized object may have passed through the solar system billions of years ... These planets’ orbits show minor discrepancies from the ideal circular shape.

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 ...

Scientists have claimed that an interstellar visitor, much larger than any celestial body in our solar system ... on the dynamical excitation of minor planets in the asteroid belt and the trans ...

Last fall, the scientific community went into a minor frenzy. A hunk of interstellar material had been sucked into the ...

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

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.

"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.

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 ...