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

The object in question is believed to be an interstellar visitor, meaning it originated outside of our solar system and ventured into the depths of our cosmic neighborhood. Such objects are rare ...

Most people hear “spacecraft” and envision rockets blasting into space, but they’re often not aware of the meticulous ...

The theory gained traction as observations revealed a relative void of interstellar dust near our solar system ... paints a ...

Scheduled to launch on Feb. 27, NASA's PUNCH mission could revolutionize space weather forecasts, unify the solar corona and ...

For decades, scientists have marveled at the Local Hot Bubble—a vast, low-density region stretching roughly 1,000 light-years ...

Helium can help scientists detect the speed and direction at which we’re moving through space. Deuterium, which is left over ...

This may explain the strange properties of the orbits of our solar system's planets, which are not quite perfectly circular, and all lie on slightly different planes. NASA artist’s conception of ...

Researchers believe rogue planets, formed by gravitational ejections during early solar system evolution, may outnumber stars and frequently drift through interstellar space. Every million years ...

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests.