Long ago, a planetary object eight times the mass of Jupiter may have once visited the solar system and altered […] The post ...

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

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

In case anyone missed the January planetary alignment, two more are expected to be seen in the night sky in February, with ...

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 ...

An unidentified interstellar object, possibly eight times Jupiter’s mass, may have disrupted the solar system’s planets.

While planets circle the sun in what's called and heliocentric orbit, they rarely fall together in what appears to the human ...

Starting at 12:30 p.m. ET (1730 GMT) on Saturday (Jan. 25), astrophysicist Gianluca Masi of the Virtual Telescope Project ...

In 1986 and 1989, Voyager 2 made the final two stops on its grand tour of the outer solar system when it swept by Uranus and Neptune ... which are not that far apart in mass, are not dipolar.

A handful of planets in the solar system are expected to line up in the night sky for a few days in January 2025. Here's when ...

A planet parade will be happening high above the earth. But there is a debate on whether it is as special as you may be ...

For much of January and February, you have the chance to see six planets in our solar system after dark, although two — Uranus and Neptune — will be hard to see without a telescope or high-powered ...