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

Here’s what you should know when you go outside to see for yourself: Yes, the planets are indeed lined up across our sky. No, ...

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

Mercury joins the night sky to complete a seven-planet alignment just after sunset for the end of February. Saturn leaves our ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

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

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

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

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

Astronomers discovered the gas giant planet — dubbed a "hot Jupiter " — in 2016, but have continued to investigate this ...