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

Explore daily insights on the USA TODAY crossword puzzle by Sally Hoelscher. Uncover expert takes and answers in our ...

Two new studies show a briny, carbon-rich environment on the parent body of the Bennu asteroid was suitable for assembling ...

Scientists have detected organic compounds and minerals necessary for life in the samples collected by the OSIRIS-REx mission ...

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

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

NASA’s James Webb Space Telescope has revealed the atmospheric origin of exoplanet GJ 1214 b and its results challenges ...