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

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

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

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

Researchers have pioneered an innovative method using helioseismology to measure the solar radiative opacity under extreme ...

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

A Triple Star System Yields an Unusual Surviving Star Unlike our Sun, which exists alone, at least half of the stars in our ...

The James Webb Space Telescope has given astronomers groundbreaking insight into a new type of planet described as unlike ...

A planet that may support alien life has been discovered less than 20 light-years from Earth. The "promising" super-Earth - ...

The discovery of the exoplanet, which orbits a star outside the solar system, challenges how experts ... the researchers put together theoretical models that could explain the data.