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Astrophysics

The particle collider smashes together atomic nuclei—comprised of particles called protons and neutrons—to break them into their smaller components.

The U.S.’s Only Particle Collider Recreated Moments From the Early Universe. Now, It Has Closed—to Make Way for a New Instrument

The end of the facility’s 25-year run is “bittersweet”

Lab-made cosmic dust on a chip

Physicists Create Homemade Cosmic Dust, Which Could Help Them Figure Out How the Building Blocks of Life First Reached Earth

Cosmic dust normally comes from dying stars. The recipe for a lab-made version includes a few gases, vacuum tubes and electricity

An artist's impression of an asteroid

An Asteroid Might Slam Into the Moon in 2032—and Create a Fiery Flash That’s Visible to Earthlings, New Research Suggests

Currently, NASA estimates that asteroid 2024 YR4 has a 4.3 percent chance of hitting our lunar companion

The JADES-ID1 protocluster

Astronomers Spot a Huge Cluster of Galaxies Forming Earlier in Cosmic History Than Thought Possible

The young galaxy cluster existed about 12.8 billion years ago and has an estimated mass 20 trillion times that of the sun

Researchers are using an instrument at the SLAC National Accelerator Laboratory to uncover the original text of reused parchments.

Medieval Monks Wrote Over a Copy of an Ancient Star Catalog. Now, a Particle Accelerator Is Revealing the Long-Lost Original Text

The parchments initially contained references to a star catalog and maps created during the second century B.C.E.

An image containing nearly 800,000 galaxies from NASA's James Webb Space Telescope, overlaid with dark-matter clumps shown in blue

See the Most Detailed Map of Dark Matter Ever Made, Bringing Astronomers a Step Closer to Unraveling Its Mysterious Nature

The invisible stuff makes up about 85 percent of all matter in the universe, but researchers know little about it

Shenzhou-15 spacecraft debris streaked across the sky above California in April 2024. 

Sonic Booms and Earthquake Sensors Can Help Researchers Track Space Junk as It Plummets to Earth

Falling debris can travel at about 30 times the speed of sound, creating sonic booms that shake the ground

A "bar" of iron atoms, colored red in this image, has been hiding inside the Ring Nebula.

Cool Finds

Astronomers Discover a Mysterious Bar-Shaped Cloud of Iron Within the Iconic Ring Nebula

Humans have been eyeing the colorful Ring Nebula for nearly 250 years, but testing out a new telescope tool led to the perplexing finding

Researchers were shocked to find a shock wave around a dead star. 

This Mysterious Gas Cloud Spotted Around a Dead Star Is Beautiful—but Astronomers Say It Shouldn’t Be There

The stellar corpse is spewing star stuff, which is heating and compressing surrounding gas, resulting in a multicolored display. But it’s missing a component thought to be necessary for this phenomenon

Cloud-9, shown in magenta. The circle represents the region where researchers focused their search for stars—the peak of radio emission.

Astronomers Find an Odd Space Cloud, Like a Galaxy Without Stars, That Could Shed Light on the Secrets of Dark Matter

Named “Cloud-9,” the discovery is a new type of celestial object known as a RELHIC, which is unlike anything scientists have ever observed

An artistic representation of a galaxy cluster forming shortly after the universe began

Cool Finds

This Early-Universe Cluster of Galaxies Is Way Hotter Than It Should Be

Gas within the cluster, which existed merely 1.4 billion years after the Big Bang, is at least five times hotter than computer simulations predict it should be, a study suggests

An artistic representation of a superkilonova

In a First, Astronomers May Have Witnessed a Rare Double Explosion of a Star Called a Superkilonova

A massive star may have burst, leaving behind two dense, dead cores, which then collided and caused another explosion

An artistic representation of exoplanet PSR J2322-2650b, on the left, and the pulsar it orbits, on the right

This Lemon-Shaped Planet Has an Atmosphere Unlike Anything Astronomers Have Ever Seen

The James Webb Space Telescope detected an atmosphere rich with carbon and helium, which is unexpected on this hot planet roughly 2,000 light-years from Earth

NASA’s Lucy spacecraft, which is investigating a group of asteroids that share Jupiter's orbit around the sun, snapped this image on September 16 as 3I/ATLAS approached Mars. 

Interstellar Comet 3I/ATLAS Is About to Make Its Closest Approach to Earth. Here’s How to View It With Binoculars or a Telescope

On December 19, avid skywatchers can catch a glimpse of the mysterious visitor through powerful binoculars or a telescope when it’s around 170 million miles from our home planet

Time passes by faster on Mars than on Earth.

How to Keep Time on Mars: Clocks on the Red Planet Would Tick a Bit Differently Than Those on Earth

On average, Martian time ticks roughly 477 millionths of a second faster than terrestrial clocks per Earth day. But the Red Planet’s elongated orbit causes the time difference to vary as Mars travels around the sun

Supernova remnant Cassiopeia A, which sits within the Milky Way

Astrophysicists Found an Abundance of Odd Elements Essential for Life in the Leftovers of an Exploded Star

The surprisingly high amounts of chlorine and potassium in a supernova remnant could help solve the mystery of where these crucial elements come from

A computer simulation of a black hole being born

The Most Massive Black Hole Merger Ever Seen Was So Rare, It Seemed Impossible. Now, Astrophysicists May Finally Have an Explanation

Past research about black hole births rarely included magnetic fields or the spins of the precursor stars. But considering those factors could explain the origins of two unusual objects that collided

This glimpse of the northern lights was captured in Missouri on November 11, 2025.

The Sun Erupted With the Year’s Largest Solar Flare This Week, and Space Weather-Fueled Aurora Activity Could Continue

The last in a series of three coronal mass ejections hit Earth on Wednesday, so experts are keeping an eye on geomagnetic storm potential

A remnant of a Type Ia supernova

The Universe’s Expansion May Be Slowing Down, Not Speeding Up, New Research Suggests

A new study challenges a long-held idea that the universe’s expansion is accelerating

An artist's concept of a supermassive black hole shredding a massive star

Astronomers Detect the Brightest and Most Distant Black Hole Flare Ever Seen

The enormous outburst was likely caused by an unfortunate star venturing too close to a supermassive black hole

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