Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

New research suggests that a massive, unidentified object might have passed through our Solar System billions of years ago, ...

G3 may be hard to see due to weather patterns and the California wildfires, said Tim Brothers of the Massachusetts Institute ...

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

Traveling from one star to another is currently impossible to achieve within a human lifetime. But some projects are ...

A once-in-a-lifetime comet is approaching the sun — and it will be visible for the first time in 160,000 years. The comet ...

The seven planets will not be perfectly aligned, but will appear in an arc across the sky due to their orbital plane in the ...

Discover the fascinating story of the 'blue lurker,' a mysterious star in the M67 star cluster studied by NASA's Hubble ...

The ESA Solar Orbiter has provided a stunning new look at the Sun by combining 25 high-resolution images. This mosaic offers a detailed view of the solar surface, including sunspots and granules, ...

In Earth's upper atmosphere, a fast-moving band of air called the jet stream blows with winds of more than 275 miles (442 km) ...

Venus and Saturn are currently in conjunction, meaning the planets appear close together in the night sky from Earth. These ...

Further simulations on flybys into the inner Solar System revealed one of our own planets might be flung out of the ballpark ...