Mercury is the closest planet to the sun, followed by Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Mercury orbits ...

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

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

Worlds with liquid water could have formed just 200 million years after the big bang from the remains of the earliest ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

If everything in our solar system formed from the same solar nebula, why do the planets have different compositions? Herbert WichTitusville, Florida To better understand why the planets have variable ...

Exoplanets have captured the imagination of the public and scientists alike and as the search continues for more, researchers ...

The James Webb Space Telescope’s (JWST) picture of the month for February 2025 is showing off the power of planet formation.

Stargazers can witness a rare 'planet parade' in January and February 2024, where six planets align prominently in the night ...

Although it's being mistakenly promoted as a "rare planetary alignment," one of the best "planet parades" in half a century ...

For decades, astronomers have debated how the solar system's planets formed. However ... circles that are arranged concentrically around the sun and lie on the same plane. (If you viewed them ...