Outer Space

Apollo 11 astronauts watched the Earth rise above the moon’s horizon on July 20, 1969.

Apollo Astronauts Left American Flags, Boots and Even Poop on the Moon. Here's Why These Artifacts Matter

Fifty-five years after the first human lunar landing, scholars and experts are looking to preserve the past as more nations and companies undertake moon missions

An artist's rendition of the eight planets in our solar system. The planets are depicted closer together than they really are.

Astronomers Propose New Criteria to Classify Planets, but Pluto Still Doesn't Make the Cut

The new definition would define planets based on mass, rather than more ambiguous shape and size characteristics

A pit in the Sea of Tranquility, captured by NASA's Lunar Reconnaissance Orbiter.

Scientists Find an Underground Cave on the Moon That Could Shelter Future Explorers

Such caves could serve as lunar bases during upcoming missions, protecting astronauts against cosmic radiation and extreme temperatures

A prototype of the system for collecting the astronauts' urine. In the future, astronauts may go on longer spacewalks that will require them to carry more drinking water.

Spacesuit Prototype Turns Pee Into Drinking Water

The system is inspired by the stillsuits for collecting moisture in the science fiction epic <em>Dune</em>

The Penguin and the Egg are about 100,000 light-years apart.

James Webb's Newest Image Shows a Giant Penguin and an Egg

NASA released the dazzling portrait to help celebrate the two-year anniversary of the release of Webb's first images

Scarlett Johansson and Channing Tatum in&nbsp;Fly Me to the Moon, a new movie directed by Greg Berlanti

How 'Fly Me to the Moon' Pokes Fun at Moon Landing Conspiracy Theories

The new Scarlett Johansson and Channing Tatum film presents an alternative history in which government officials prepared to fake the moon landing before NASA pulled off the feat for real

The central region of the Omega Centauri globular cluster, where the Hubble Space Telescope found strong evidence for a medium-sized black hole.

Astronomers Spot Rare, Mid-Sized Black Hole in Our Galaxy

The black hole, if confirmed, is in the star cluster Omega Centauri, about 17,700 light-years away, and it could hold lessons about how such structures are formed

An artist&rsquo;s depiction of HD 189733b encountering an eruption of x-rays from the star it&rsquo;s orbiting

This Nearby Exoplanet Is Hot, Dangerous—and Smells Like Rotten Eggs

Located about 64 light-years away from Earth, the world is the first place astronomers have detected hydrogen sulfide outside our solar system

One of Cassini&#39;s last looks at Saturn and its main rings from a distance, produced by combining images taken in October 2016

Here’s What We’ve Learned About Saturn Since Cassini Entered Its Orbit 20 Years Ago

The Cassini-Huygens mission increased our understanding of the planet’s rings and moons

An abandoned house in the Namib Desert with the Milky Way rising above it.

See Ten Awe-Inspiring Images From the Astronomy Photographer of the Year Contest

Auroras, nebulas and stars take the spotlight in this space-themed competition, alongside shots of our own sun and moon

The International Space Station, as seen from the Space Shuttle Discovery in 2007.

NASA Will Pay SpaceX Up to $843 Million to Destroy the International Space Station

After the end of this decade, the company will guide the aging laboratory into the Pacific Ocean, where many retired spacecrafts have been deposited

Could different backyard birds, such as a robin and a bluebird, produce viable offspring?&nbsp;

Could a Robin and a Bluebird Have Babies? And More Questions From Our Readers

You’ve got questions. We’ve got experts

An illustration of debris and satellites in the geostationary ring around Earth.

ISS Astronauts Forced to Briefly Take Shelter as Russian Satellite Suddenly Breaks Up in Orbit

Officials are unsure why the satellite fractured unexpectedly, splintering into nearly 200 pieces

The European Space Agency&#39;s Planetary Defense Office tracks and observes near-Earth objects passing by our planet, such as those shown in this illustration.&nbsp;

Two Massive Asteroids Will Fly Past Earth This Week. Here's What to Know

Within 42 hours of each other, the pair of large asteroids, which both have no chance of impacting our planet, will approach Earth as they orbit the sun

The return capsule of the Chang&#39;e-6 probe lands in China on June 25, 2024, with lunar samples inside.

China Brings Samples From the Moon's Far Side to Earth in First-Ever Feat

The China National Space Administration retrieved more than four pounds of lunar soil samples, which scientists hope will shed light on the early history of Earth and the moon

An illustration of the Boeing CST-100 Starliner spacecraft, currently docked to the International Space Station as engineers troubleshoot helium leaks and thruster issues.

Starliner Astronauts Will Remain on Space Station Until July Amid Technical Issues

NASA and Boeing have delayed the crewed mission's return to Earth again, as engineers assess helium leaks and a thruster issue on the spacecraft's service module

The Milky Way spreads across the night sky above the Vera C. Rubin Observatory.&nbsp;

This Revolutionary New Observatory Will Locate Threatening Asteroids and Millions of Galaxies

Beginning next year, the Vera C. Rubin Observatory will use the world’s largest digital camera to give us a whole new view of the universe

An artist&#39;s rendering of the Voyager 1 spacecraft entering interstellar space.

After Months of Glitches and Gradual Fixes, Voyager 1 Is Fully Operational Once Again

Currently 15 billion miles away from Earth, one of NASA’s longest-tenured spacecraft is back from the brink after a technical failure last year put its future in question

Purple squares illustrate auroras on Mars, as detected by NASA&rsquo;s MAVEN orbiter between May 14 and May 20. The brighter the purple, the more auroras present.

Mars Was Hit With a Solar Storm Days After Earth's Aurora Light Show, NASA Says

Studying this event could hold lessons for scientists about how to protect astronauts from radiation on future trips to the Red Planet

Captured by the Hubble Space Telescope, the heliosphere of a young star, LL Orionis, collides with an interstellar medium of dust. A similar event with our own sun, researchers say, might have occurred between two and three million years ago.

A Giant Interstellar Cloud May Have Once Enveloped Earth, Potentially Causing Ice Ages

Astronomers suggest this cold, dense cloud compressed our sun's protective field between two and three million years ago, leaving the Earth exposed to cosmic material

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