Keith Cooper

By using protons to probe how a magnetic field responds to an expanding plasma, experimenters have replicated the particle jets spewed out by active black holes.

Although no aliens were found, the results have helped constrain expectations of possible alien transmitter power.

A mysterious ring invisible at all wavelengths except radio could be a trace of a dramatically unstable star shedding its skin.

The Milky Way is warped, possibly as the result of a collision with another galaxy billions of years ago. Studying this warp could reveal more about the structure of our galaxy's hidden matter.

Seen for the first time from the ground, the polar rain aurora produced an eerie green glow captured on camera in Norway.

If there's life on Jupiter's moon Europa or Saturn's moon Enceladus, it could have a network of deep-sea hydrothermal vents to thank for its existence, new research suggests.

The X-ray-emitting binary system Cygnus X-3 features a massive star donating matter to a compact object, probably a black hole. That may explain its perplexing brightness.

This pit crater making recent headlines may open into a larger cave that could provide a sheltered environment for both astronauts and hypothetical Martian life.

Stars that vanish from the sky may be collapsing directly into black holes without going supernova first, a new study of a bizarre binary star system suggests.

NASA's Juno spacecraft has spotted the elusive fifth moon of Jupiter transiting the giant planet's Great Red Spot, giving astronomers a rare view of this small but intriguing natural satellite.

Flaring stars, black hole outbursts and gamma-rays are just some of the cosmic exotica that Einstein Probe will hunt for.

Submillimeter wavelength radio observations of the Southern Ring Nebula have identified that it's actually a double ring, shaped by the interactions of three stars.

The great planetary instability, which saw Jupiter and the other gas giants wander chaotically through the solar system, coincides with the collision that formed Earth's moon. Could the two events be linked?

Astronomers have taken the most detailed image of the Vela supernova remnant ever. The stunning, 1.3-gigapixel image is also the largest ever released from the Dark Energy Camera.

The James Webb Space Telescope zoomed in on galaxy GN-z11, which existed just 430 million years after the Big Bang, to reveal what may be some of the oldest stars in the universe.

We think the universe is 13.8 billion years old, but could we be wrong? A new study of bound galaxies offers an unexplored clue.

The Mars Express orbiter has detected enough water ice buried beneath the Red Planet's equator to cover the entire planet in a shallow ocean if melted.

Scientists discovered 13 molecules, including some never spotted before in the early universe, inside two galaxies located 12 billion light-years away.

A distant comet trapped in orbit between Saturn and Uranus is accompanied by a transforming disk of icy dust, new observations reveal.

If dark matter is made from "dark" versions of the basic building blocks of ordinary matter, the world's largest particle accelerator should be able to pin it down, a new study suggests.

A supernova, pinpointed by amateur astronomers, could reveal unexpected new steps in the deaths of massive stars.

This supernova signaled the explosive death of a supergiant star in the nearby Large Magellanic Cloud.

China's presumed-dead Zhurong rover spotted telltale patterns of ancient climate change in the Martian dunes.

The gravity of a galaxy two-and-a-half billion light-years away has acted like a cosmic magnifying glass to amplify the light of a distant exploding white dwarf.

A polar cyclone is swirling on Uranus, further showing that the planet's atmosphere is a hive of hidden activity.