While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

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's planets onto a different course.

In addition to this week’s stellar views of Mars, stargazers can admire multiple “planet parades”—the simultaneous appearance of several planets ... close distance to the sun, Neptune ...

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

A Flat Earther once made a surprising comeback after people claimed that a selfie taken from top of Mount Everest proved ...

SPHEREx is a groundbreaking NASA telescope that will map the entire sky in infrared, revealing insights into cosmic inflation ...

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's planets onto a different course.

The planets will appear to line up — but no more than usual. The planets in our solar system orbit the sun in more or less ... and Saturn appear to close the distance between them in the night ...

Our solar system contains planets, dwarf planets ... It formed in the outer solar system, beyond the orbit of Jupiter. Despite its great distance from the sun, Bennu’s parent body remained warm ...