Keith Cooper

After many previous claims and false alarms, astronomers can finally confirm the existence of at least four planets less massive than Earth orbiting Barnard's Star.

Europe's HERA mission has taken a good look at Mars and its moon Deimos on its way to explore the aftermath of the DART impact in the Didymos–Dimorphos asteroid system.

Natural cycles in Earth's rotational axis and its orbit around the sun drive climatic changes, and now researchers have matched up specific points in those cycles to the timing of ice ages.

The total lunar eclipse on March 13-14 will plunge moon missions into darkness. What will happen to the lunar spacecraft?

A family portrait of the Andromeda galaxy and its orbiting dwarf satellites raises questions about how galaxies evolve.

A new mission designed to better understand the heliosphere will be the first to map in three dimensions how the solar corona becomes the solar wind.

The Lucy mission to Jupiter's Trojan asteroids is currently cruising through the Asteroid Belt, and will fly close to asteroid Donaldjohanson in April.

Scientists searching for microbe fossils on Mars have a better idea of what to look for thanks to gypsum that formed when the Mediterranean Ocean dried up over 5 million years ago.

The idea that life on Earth arose through a series of improbable "hard" evolutionary steps may be misjudged, according to a new paper that says our Earth had a big say in matters.

A flash of X-ray light has revealed the existence of an odd couple of stars, a massive star and a white dwarf, that shouldn't really exist together.

By tracking the TV signal back to the plane that was reflecting it towards the Murchison Wide-field Array, astronomers will be able to learn how to remove it from their data.

As the most intense star-forming region in the Local Group, 30 Doradus is of particular importance to astronomers.

Sometimes the end of the mission isn't really the end.

The creation of the belts, and others like it in the future, are a potential new danger to astronauts and satellites headed to geostationary orbit and beyond.

By tracing the corkscrew wobble of two stars as they move through the sky, the Gaia space mission has discovered one new giant "planet," plus a new brown dwarf.

Wrinkle ridges that formed in the past 160 million years suggest recent geological activity on the moon.

There are many obstacles to overcome before humans can set foot on Mars, including problems surrounding launch mass and closed-loop systems and the hazards of space radiation.

Located less than 20 light years away, HD 20794d could potentially be one of the most Earth-like planets found so far, despite its extreme climatic variability.

Computer algorithms can model the universe, matching simulations to observations and revealing the distribution of dark matter.

Buttes and mesas in Mars' Chryse Planitia contain clay minerals made from liquid water interacting with the rock nearly 4 billion years ago.

Spacecraft powered by electric propulsion could soon be better protected against their own exhaust, thanks to new supercomputer simulations.

The young protostar T Tauri is about to be eclipsed by a huge disk of gas and dust that could prompt the star to fade or even disappear.

Using the Atacama Large Millimeter Array, astronomers have discovered icy exocomet belts circling 74 different alien planetary systems.

Measurements of the distance to the Coma Cluster of galaxies find that it is millions of light years closer than the standard model predicts.