Keith Cooper

Observations with NASA's Imaging X-ray Polarimetry Explorer spacecraft have shed light on how particles are accelerated to nearly the speed of light in a blazar's jet.

Isotopic evidence points to carbonaceous chondrite asteroids bringing enough water to Mars that it could have formed a global ocean some 1,000 feet deep.

Though hot and suffocating today, Venus may have once been a temperate world before massive volcanism changed it forever.

NASA's MAVEN mission spotted two different types of auroras glowing in ultraviolet light as charged particles riding the solar storm streamed into the Martian atmosphere.

New supercomputer simulations help explain why exoplanets about twice the size of Earth are rare.

An alternative biosignature on alien planets could be the same chemical that makes laughing gas.

The oldest dead star found to have a planetary system, dating back 10.7 billion years, has been discovered covered in the rubble of destroyed worlds.

The X-ray binary system Cygnus X-1 is chomping on matter stolen from a companion star.

Reference Quarks are elementary particles that are the building blocks of all visible matter in the universe. Explore them in more detail here.

Europe's Mars Express spacecraft has peered deep into the subsurface of the Martian moon Phobos, finding unknown structures that could reveal the moon's origin.

OWLS, the Ocean Worlds Life Surveyor, would autonomously search for life on the icy moons of the outer solar system.

A new crowdsourcing science project called "Spritacular" is asking skywatchers to use their digital cameras to try to capture images of unusual electrical discharges above thunderstorms.

The JPSS-2 satellite will seek to better understand the "butterfly effect" of how atmospheric conditions in one part of the world can cause a hurricane in another part.

Experiments have shown how the world's hardiest microbe could endure freezing, dry and irradiated conditions on Mars.

The near-Earth asteroid Ryugu formed far from the sun, in the cold depths of the outer solar system, according to new analysis of samples returned from Ryugu by the Japanese Hayabusa2 mission.

Five years after spotting 'Oumuamua, the first known object from beyond our solar system passing through, scientists are still figuring out what the strange object says about planetary systems.

The Mars Express spacecraft has witnessed a rare spectacle, spotting Mars' moon Deimos appearing to pass in front of Jupiter and its moons on Valentine's Day (Feb. 14).

NASA's iconic new observatory has spotted surprising compounds around supermassive black holes.

A unique, helium-filled, sulfuric-acid resistant balloon called an aerobot successfully completed two test flights over the Nevada desert.

A catalog of rock types that could be found on exoplanets covered in lava will aid researchers using the James Webb Space Telescope in characterizing these molten worlds.

NASA's Dragonfly mission to Saturn's largest moon will touch down on a terrain of dunes and shattered, icy bedrock, according to a new analysis of radar imagery from the Cassini spacecraft.

The stars are so close that the white dwarf can steal matter from its companion, and this matter piles up and explodes on the white dwarf's surface.