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

It is not just within our Solar System that planet alignments are useful. Astronomers use alignments to probe many different ...

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

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 ...

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

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

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

On Feb. 24, from west to east, you can see Mercury, Saturn, Neptune, Venus, Uranus, Jupiter and Mars, all spanning 117.5°, ...

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

Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet. Reaching speeds ...

15, 2025 — New observational data and simulation models have confirmed a new type of planet unlike ... could reshape our understanding of the Earth-Moon system and the broader solar system.

In the depth of winter, a sweeping view of our solar system will glow in the ... That means the Sun and the "Red Planet" are directly opposite from each other with Earth in the middle.