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Physics

Most of the research team's computer simulations resulted in no comets hitting Earth during its early years.

What Seeded Life on Earth? New Research Challenges the Longstanding Theory That Comets Brought the Ingredients to Our Planet

Computer simulations suggest comets carrying a key precursor to many of life’s building blocks would have rarely—if ever—successfully reached Earth’s surface. And even if they did, only specific landing conditions would have allowed the precursor molecule to drive biologically relevant reactions

Plastics become trapped in the Great Pacific Garbage Patch and eventually break down into microplastics.

The Great Pacific Garbage Patch Has Accumulated So Many Microplastics They Might Be Changing the Color of the Ocean

Satellite data suggests water in and around the huge area filled with human-made debris has become more blue-green over the past two decades. Computer simulations suggest microplastics are to blame, but researchers need samples to confirm their hypothesis

Simulation of gas structures as electrons were removed from helium by radiation emitted by early stars and black holes.

See a Stunning Simulation of the Early Universe, Which Will Help Astronomers Shed Light on the Cosmic Dark Ages

The model, created by researchers at the Center for Astrophysics, Harvard & Smithsonian, and other institutions, captures how the first stars and black holes gradually illuminated the universe after millions of years of darkness

Over the past couple of years, Swift had been falling out of orbit faster than expected.

After Observing the Sky for 22 Years, a Beloved NASA Space Telescope Is Expected to Meet a Fiery Death This Week

The Neil Gehrels Swift Observatory launched in 2004 and detected thousands of astrophysical phenomena, leading to some huge discoveries. Earlier this year, experts attempted a first-of-its-kind rescue mission to save the falling telescope, but it failed

The positron is held inside a tank beneath ground level.

For the First Time, Scientists Trapped an Elusive Antimatter Particle—and Contained It for Months. It Could Allow Them to Test an Enduring Physics Theory

The standard model of particle physics works really well, but it can’t explain why the universe exists. Something is missing, and this trapped particle might hold a clue to the answer

An artist's impression of white dwarf J1330+6435, which might appear ghostly green because of certain elements in its dense atmosphere

In a First, Astronomers Identify a Star That Might Glow Green. New Research Highlights the Strange Hues White Dwarfs Can Take on

White dwarf stars are too far from Earth to be observed directly. So, scientists reconstructed how they’d look to human eyes based on the wavelengths of light they emit and found a colorful array of objects that might appear yellow, purple or pink

Leap seconds have kept our clocks more or less aligned with astronomical time.

It’s Official: Timekeepers Have Gotten Rid of the Leap Second—and Introduced the Leap Hour Instead

Since 1972, experts have added 27 seconds to Coordinated Universal Time to keep it aligned with Earth’s rotation, but it has been an imperfect fix

Francis Halzen is a Belgian American physicist who studies neutrinos, sometimes called "ghost particles," which come from space and rarely interact with ordinary matter.

Physicist Wins Nobel Prize for Developing a Massive, Ice-Embedded Observatory That Detects Ghostly Cosmic Particles

Francis Halzen of the University of Wisconsin-Madison led the effort to build the IceCube Neutrino Observatory in Antarctica. His work birthed the field of neutrino astronomy

Mercury as seen by NASA’s MESSENGER spacecraft during a flyby in 2008, before it began orbiting the planet.

Mercury Has Wrinkles That Show It’s Shrinking. Now, Scientists Say the Planet Has Shriveled Far More Than Previously Thought

A new study suggests that our solar system’s smallest planet has shrunk by up to 30 percent since its birth roughly 4.5 billion years ago

Galaxy NGC 1386, which hosts an active supermassive black hole that was analyzed in a new study

Active Supermassive Black Holes May Be Engines of Star Formation, Not Just Destruction, Study Suggests

Scientists mapped out the structure of nine bright cores of galaxies located near the Milky Way and revealed common patterns that could shed light on how the universe evolved

Venus is one of only two planets in our solar system that lack a moon. (Mercury is the other.)

Billions of Years Ago, Venus May Have Had a Moon—Which the Planet Promptly Gobbled Up, Study Suggests

Scientists have puzzled over why the planet dubbed “Earth’s twin” doesn’t have a moon. Computer simulations hint that if Venus ever did have one, it probably would’ve cannibalized its companion

This year's Ig Nobel Award ceremony took place in Zurich, Switzerland.

Stealing Candy From Children, Splash-Proof Urinals and Buried Panties, Oh My! Here Are the Winners of the 2026 Ig Nobel Prizes

The awards are an unaffiliated spoof of the Nobel Prizes. They highlight research achievements that are surprising and silly-sounding—but also make people think

If a theoretical dark matter particle interacts with liquid xenon in an underground tank, these light sensors should detect the resulting flash of light. 

Scientists May Have Finally Detected a Hint of Dark Matter, the Mysterious, Invisible Stuff That Holds the Universe Together

A South Dakota-based instrument built to detect theoretical dark matter particles has sensed a particle interaction that’s difficult to explain with known phenomena. But more data is needed to confirm that the strange substance—which scientists have never directly observed—is, indeed, the culprit

The Golden Gate Bridge in San Francisco is coated in a protective paint called International Orange.

Why Does Rain Eat Through Protective Coatings on Metal Structures? Researchers Propose a New Idea: Electrically Charged Droplets

Scientists long attributed rain damage to physical abrasion and chemical degradation from acidic substances. A new study offers a third idea, which could help researchers develop longer-lasting coatings and preserve important objects

NASA has been planning and developing the Roman Space Telescope for 16 years.

NASA’s Nancy Grace Roman Space Telescope Launches to Find Exoplanets and Unravel Mysteries of Dark Matter and Dark Energy

The new observatory will complete three surveys of the universe in five years, although it’s designed to function at least twice as long. Its data could change scientists’ basic understanding of the cosmos

Many stars orbit the Milky Way's central supermassive black hole. But S301's orbit, shown in red, is the only one known to be close enough to feel the effects of the black hole's theorized spin.

This Star Orbits Our Galaxy’s Heart at a Record-Breaking Speed—and Could Help Uncover Secrets About the Behemoth Black Hole There

The speedster travels at up to 56 million miles per hour, or about 8 percent the speed of light. It also gets very close to the supermassive black hole at the center of the Milky Way

The Helix Nebula with bow shocks on the upper left

A New Telescope Still Under Construction Accidentally Reveals How a Dying Star Returns Matter to Space

Researchers captured an unprecedented image of the stellar recycling process while calibrating a Chile-based instrument called MOTHRA, which is expected to be complete by the end of 2026

An artistic rendering of the Neil Gehrels Swift Observatory, which is now falling after watching the sky for more than 20 years.

NASA-Funded Mission to Rescue a Falling Space Telescope Officially Ends in Failure

The commercial LINK spacecraft was supposed to give NASA’s Swift observatory a boost, pushing it higher into orbit to extend its life. But after launch, LINK experienced several problems. Swift is expected to re-enter Earth’s atmosphere and burn up by the end of this year

According to a niche perspective called “cosmological evolution,” universes may reproduce by spawning black holes in which new universes may form. The concept is far from proven, but researchers note its potential.

Earth’s Organisms Developed Via Evolution. Some Theorists Wonder: What if the Entire Cosmos Did, Too?

The idea that universes evolve like organisms sat on the fringes of theoretical physics for decades. Then, a Substack post and a 2022 find by the James Webb Space Telescope boosted the concept

Illustration of a black hole star, an enormous black hole surrounded by dense hydrogen gas

Astronomers Peered at the Early Universe and May Have Discovered a New Kind of Celestial Object: Black Hole Stars

Since the James Webb Space Telescope started collecting data in 2022, it has found puzzling objects dubbed little red dots. A new study suggests they might be giant black holes with some characteristics of stars

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