Keith Cooper

Our solar system's famous "invader" might be as old as the Milky Way itself.

What is nuclear electric propulsion and how is it different from radioisotope thermoelectric generators?

The unprecedented observations of comet 41P/Tuttle–Giacobini–Kresák show its rotation slowing, reversing and then speeding up, and jet-like outbursts of gas might be providing the push.

The powerful magnetic field belonging to the sun is generated far beneath the visible surface.

Astronomers have found four new moons orbiting Jupiter and 11 new moons around Saturn.

These worlds are among the least dense ever found, and all attempts to probe their atmospheres have been blocked by a mysterious smog.

As binary neutron stars spiral around each other to merge, their gravitational tidal forces distort each other's shape and structure, potentially revealing clues as to what lies within them.

Never-before-seen temperature and ion density measurements reveal that the effect of Jupiter's moons on its aurora are more complicated than scientists thought.

The mission without a doubt proves that we could deflect a hazardous asteroid away from Earth — so long as we discover it in the nick of time.

We may be missing alien radio signals because they have become smeared beyond the narrowband detectors that SETI utilizes, a new study suggests.

The James Webb Space Telescope has revealed our lunar companion is safe for now from an asteroid impact.

Tests involving growing chickpea plants in lunar regolith treated with vermicompost and fungi yielded harvestable crops — but are they edible?

Tests conducted with tardigrades suggest that there is something in Martian dirt that dramatically reduces biological activity.

By fertilizing inorganic regolith with organic human waste that has been processed through bioreactors, future astronauts living on Mars could be able to create their own organic soil.

A new method of predicting when a superflare will erupt from the sun suggests that we are in the middle of such a period now — and that could be bad news for the Artemis 2 astronauts.

The nebula is possibly being produced by a type of unstable star called a Wolf–Rayet star.

Flashes of gravitationally lensed starlight could act as cosmic lighthouses revealing the presence of binary supermassive black holes in close orbit.

If launched in 2035, a spacecraft performing such a maneuver could fly by 3I/ATLAS by 2085.

A massive upheaval in the Saturnian system could have also led to the moon Hyperion.

The discovery is just the latest to come from the asteroid sample, which dates back to the dawn of the solar system.

The key to solving the mystery of the Viking results is the discovery of perchlorate on the Martian surface in 2008.

It's nicknamed Jetty McJetface.

Perchlorate, a toxic substance found in Mars dirt, could help the bacterium Sporosarcina pasteurii strengthen bonds between particles of regolith.

Jupiter may be a bit more petite than expected, and that could have a big impact on how scientists model the mysterious interior of the giant planet.

The planet is one of the best worlds for follow-up studies to determine whether it could be habitable or not.