Certain extreme planets are called ultra-short period objects if they're very close to their stars and orbit them in mere hours, like K2-22b.

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

Material retrieved from the asteroid Bennu by NASA’s OSIRIS-REx spacecraft shows that all the basic building blocks of life ...

Scientists studying samples that NASA collected from the asteroid Bennu found a wide assortment of organic molecules that ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

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

Astronomers have found two planets around two separate stars that are succumbing to their stars' intense heat.

Astronomers have found two planets around two separate stars that are succumbing to their stars’ intense heat. Both are ...

Kepler was one of the most successful exoplanet-hunting missions so far. It discovered 2,600 confirmed exoplanets—almost half ...

Four planets will be in the parade in January, while seven will align in February. Here's how to see the events.

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

Worlds with liquid water could have formed just 200 million years after the big bang from the remains of the earliest ...