An astronomer and a group of eagle-eyed citizen scientists have discovered a giant gas planet hidden from view by typical stargazing tools.

Astronomers have discovered at least 70 new free-floating planets — planets that wander through space without a parent star.

Water is essential for life on Earth and other planets, and scientists have found ample evidence of water in Mars’ early history.

A chunk of rock and iron, which was 60 feet across, served as a violent reminder that Earth, bombarded daily with tons of space-going debris

Watch as eight stars skirt a black hole 1 million times the mass of the Sun in these supercomputer simulations.

NASA plans to crash a spacecraft traveling at a speed of 15,000 miles per hour into an asteroid next year to test 'planetary defense'.

Planets known as eggshell planets, which orbit distant stars, have ultra-thin crusts too thin to sustain tectonics and are hostile to life.

Thousands of alien worlds are known to orbit stars beyond our solar system. And many more worlds, possibly harboring life.

A NASA sounding rocket will observe a nearby star to learn how starlight affects the atmospheres of exoplanets in the hunt for life.

Studying the atmospheres of white dwarfs that have been “polluted” by such debris, researchers have identified exotic rock types.

Dozens of space-based telescopes operate near Earth and provide incredible images of the universe. Imagine a telescope in the outer system.

NASA plans to crash a spacecraft traveling at a speed of 15,000 miles per hour into an asteroid next year in a test of "planetary defense".

Water is essential for life on Earth and other planets, and scientists have found ample evidence of water in Mars’ early history.

New findings from NASA's Juno probe orbiting Jupiter provide a fuller picture of how the planet's distinctive and colorful cloud processes.

Mars is a potential source of what is sure to be one of the most valuable elements in the space economy—hydrogen.

Researchers have developed a concept that would make rocket fuel on Mars, that could be used to launch future astronauts back to Earth.

Researchers from Chile directly measure the amount of both water and carbon monoxide in the atmosphere of a planet in another solar system.

One of the youngest planets ever found around a distant infant star has been discovered by an international team of scientists.

A planet transiting a star outside of the Milky Way galaxy may have been detected for the first time by the Chandra X-ray Observatory.

Water is essential for life on Earth and other planets, and scientists have found ample evidence of water in Mars’ early history.