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Outer Space

An image of interstellar comet 3I/ATLAS captured by a telescope in Hawaii

Interstellar Comet 3I/ATLAS Might Be the Oldest Object Ever Seen in Our Solar System, a Study Suggests

Based on the composition of gases spewed by the icy space rock, researchers estimate that our guest might be up to 12 billion years old—about three times the age of the solar system

Crystal containing thorium-229 atoms used in the European team's clock

The World’s First Nuclear Clocks Are Ticking, Opening a New Way to Investigate Dark Matter and Other Mysteries of Physics

Two independent teams of scientists have created the first functional clocks that can keep ultraprecise time using the nuclei of a radioactive element

Illustration of NASA’s Neil Gehrels Swift Observatory

This Week, NASA Will Launch a First-of-Its-Kind Mission to Save a Space Telescope That Has Observed the Sky for Nearly 22 Years

In 2024, researchers realized that the Neil Gehrels Swift Observatory was falling from its orbit faster than expected. Now, a robotic spacecraft called LINK aims to give the satellite a boost

Astronomers used galaxy cluster MACS J0416 (background), as a magnifying glass to view the extremely faint galaxy LAP1-B (inset), which is visualized here based on the James Webb Space Telescope's infrared data.

Astronomers Discovered a ‘Cosmic Fossil’ in the Making—the Most Chemically Primitive Galaxy Seen Yet—by Peering Back to the Edge of Time

The James Webb Space Telescope observed 13-billion-year-old light, using a closer galactic cluster like a magnifying glass. The work helps experts understand the universe’s earliest stars and mysterious ultra-faint dwarf galaxies

The southern lights curve above the Earth as the ISS orbited above the Indian Ocean southwest of Perth, Australia.

See a Stunning View of the Southern Lights Dancing Across the Earth Captured by a NASA Astronaut

Jessica Meir, commander of NASA’s SpaceX Crew-12 mission, shared photos and videos of a green aurora she shot while sheltering in a capsule outside the International Space Station

The Pillars of Creation in the Eagle Nebula is a region where stars are born, seen in Smithsonian Starstruck.

See a Diamond Planet, an Exploding Star and a Black Hole Up Close in a New Immersive Virtual Reality Experience

Informed by science from the Smithsonian Astrophysical Observatory and astronomers worldwide, this “documentary that you can walk through” visualizes the cosmos in a 3-D introduction to the universe

A slice of the rare angrite meteorite NWA 12774 shows olivine crystal (green), a mineral rich in magnesium.

A Rare Meteorite Found in the Sahara Desert Offers Evidence of a Lost Protoplanet

Chemical signatures indicate the meteorite came from an early planet that met an untimely end during the formation of our solar system

Director Steven Spielberg on the set of Disclosure Day, his latest UFO-inspired film

What’s Behind Steven Spielberg’s Lifelong Obsession With Flying Saucers and Extraterrestrial Visitors?

Half a century after “Close Encounters of the Third Kind,” the director returns to the subject of UFOs with “Disclosure Day.” His science fiction films are informed by his fascination with alien encounters in American suburbia

At a press conference on June 9, NASA announced the crew of its upcoming Artemis 3 mission to low-Earth orbit. Commander Randy Bresnik, pilot Luca Parmitano and mission specialists Frank Rubio and Andre Douglas will make up the four-person crew.

NASA Announces the Crew of Artemis 3, Four Astronauts Who Will ‘Take Calculated Risks’ in Low-Earth Orbit and Pave the Way for a Future Moon Landing

The mission, expected to launch next year, will practice meeting and docking with lunar landers developed by SpaceX and Blue Origin

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America at 250: The Revolutionary Spark

Some Presidents Offer More Than Just Policy. Here Are Five Who Brought Their Innovative Spirit to the Office

One president invented campaign buttons so he could just stay home during election season. Another one rallied Americans to go to the moon. And one—only one—holds a patent.

Composite image of evidence for wind blowing away from Sagittarius A*, with the black hole shown as a white dot in the center, cold gas in orange and X-ray data in blue. 

The Supermassive Black Hole at the Heart of Our Galaxy Seems to Be Blowing Wind—Just as Scientists Long Theorized

Scientists have been searching for evidence of this breeze since the 1970s. They’ve seen intense wind from other black holes, but they’ve struggled to observe the one at the Milky Way’s center

A 235-foot-tall Delta IV takes off with 2.1 million pounds of thrust from its three RS-68A booster main engines, creating a magnificent light show in the sky.

See 15 Inspiring Images of Americans’ Accomplishments in Space Exploration That Will Have You Reaching for the Stars

These photographs from the Smithsonian Magazine Photo Contest show the many ways that the nation’s brightest minds explore the great beyond with crewed spacecraft, rockets and space stations.

An artistic rendition of the MAVEN spacecraft orbiting Mars

NASA Officially Ends the MAVEN Mission Months After Losing Contact With the Mars Orbiter

The agency last heard from the spacecraft on December 6. Recovered fragmentary data suggest that MAVEN was spinning unexpectedly, hinting at a change in its trajectory and draining its batteries

An illustration of all 726 solar systems depicting planets confirmed as of October 30, 2018, the end of Kepler’s life span. The colors represent each planet’s temperature, ranging from chilly dark blue to fiery red. The mission yielded so much data that scientists are still announcing new planets years later.

America at 250: The Revolutionary Spark

A Blip on a Telescope in a Colorado Parking Lot Bolstered a Space Mission That Has Found Thousands of Planets … and Counting

The Kepler telescope changed how we saw the sky. It’s just one of the devices we’ve sent out beyond the reach of humans to search our solar system

People across New England and eastern Canada witnessed an ultrabright meteor explode over the weekend.

A Bright Meteor Lit Up the New England Sky Before Exploding With a Loud Boom—and Its Pieces May Have Landed in Cape Cod Bay

People reported seeing the glowing space rock or hearing or feeling its breakup from Delaware to Montreal. Experts estimate that it was about three feet wide and traveling at 75,000 miles per hour when it broke apart

A blue moon in 2015

A Smaller Than Usual Blue Moon Will End the Month With a Lunar Spectacle. Here’s What to Know About the Full Micromoon

The blue moon will be the second of two full moons in the same month, a coincidence that only takes place about every two and a half years. It will also appear to be slightly smaller and dimmer than the average full moon

Rhys Ifans (standing in second row) as the chief designer in "Star City," a spinoff of Apple TV's "For All Mankind" 

Based on a True Story

Soviet Cosmonauts Trained at Star City as They Raced to Beat America to the Moon. Now, a New TV Series Imagines What Happened Behind the Base’s Walls

Apple TV’s “Star City” takes place in a world where the space race never came to an end. A spinoff of “For All Mankind,” the show is told from the Soviet perspective

As the Psyche spacecraft approached Mars from its night side, the red planet looked like a crescent.

See NASA’s Stunning New Images of Mars Captured During an Asteroid-Bound Spacecraft’s Strategic Flyby

The Psyche mission, on its way to study an asteroid of the same name, approached within 2,864 miles of the red planet on May 15

Neptune, which appears blue because of methane in its atmosphere, has a strange set of moons.

Neptune’s Moon Nereid Might Be the Sole Intact Survivor of an Ancient Lunar Collision

A study suggests that the ice giant’s largest moon, Triton, made a dramatic entrance to the Neptunian system long ago, kicking Nereid outward and destroying the planet’s other original lunar companions

"Night at the Remarkables" 

These Ten Breathtaking Images From the 2026 Milky Way Photographer of the Year Contest Capture the Beauty of Our Galaxy

The gorgeous astrophotographs highlight the dazzling night sky and remind viewers what we risk losing to light pollution

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