Keith Cooper

Black hole light echoes are an extreme form of gravitational lensing.

Huge shells of frozen carbon dioxide at Mars' south polar cap resulted in subsurface meltwater, which fed a huge system of rivers, lakes and even a sea, a new study suggests.

Venus' wrinkled, deformed "tesserae" terrain may be ancient impact features the size of continents, a new study suggests.

The hungriest known black hole in the early universe has been found, thanks to teamwork between NASA's James Webb Space Telescope and Chandra X-ray Observatory.

A joint Hubble and James Webb Space Telescope (JWST) project to learn more about the dusty disk around the bright star Vega has found a surprising lack of planets.

AstroForce has received a commercial license for operating and communicating with a mission headed to a near-Earth asteroid, the first to be granted for beyond Earth orbit.

Mars' global magnetic field may have hung around for 200 million years longer than scientists had thought, possibly giving life a longer window to take hold on the Red Planet.

The imprecision in the measurements of claimed interstellar fireballs means it is highly likely they originate in the solar system instead, a new study reports.

The two cubesats will assist in the most detailed study ever of a binary asteroid.

A decision to cut spending on the Hubble Space Telescope by 10% and on the Chandra X-ray Observatory by 40% has been postponed.

Deep in the heart of the massive Perseus cluster, giant galaxies stir, stars are torn from their homes and hot gas radiates at more than 1 million degrees Celsius.

Teleoperated rovers could soon be working on the moon, with human controllers on Earth manipulating the rovers' tools virtually.

A new search for extraterrestrial radio signals during planetary occultations in the TRAPPIST-1 system provides a promising new strategy for hunting for extraterrestrial life.

The Hubble Space Telescope has seen Jupiter's Great Red Spot oscillating in width as it drifts around the planet. Could this be related to its overall shrinking?

The Taurid Meteoroid Stream, responsible for two November meteor showers and possibly the Tunguska and Chelyabinsk impacts, probably doesn't hide a civilization-killing asteroid, a new study finds.

Jets of carbon monoxide and carbon dioxide gas were seen coming from a centaur, but what drives them is a big mystery.

In response to NASA's plea for help bringing the cost and complexity of its Mars sample-return program, Rocket Lab has won a contract to study a potential solution.

All four technologies are grounded in reality, but some are more feasible than others.

New computer simulations show how a now-frozen ocean of water mixed with dirt and rock could explain geological features on Ceres' surface.

From water recycling to carbon capture, there are a myriad ways in which space technologies can be applied to help us live in a more environmentally friendly way on Earth.

The Rosette Nebula in Monoceros is captured in all its glory, revealing the sites of star formation and the feedback effects of stars that have already coalesced out of the nebula's molecular gases.

The Milky Way's system of small, orbiting satellite galaxies is quite unusual, a new 12-year study of other galaxies in the local universe has found.

A 14-year Hubble Space Telescope study suggests the universe was teeming with supermassive black holes. But how could that be?

A puzzling discrepancy in measurements of the mass of the W+ and W– bosons, which are fundamental particles that carry the weak force, has been resolved by the Large Hadron Collider.