Stefanie Waldek

Chiron is forming a ring system, and scientists seem to have caught the action.

Astronomers have sighted Betelgeuse’s mysterious companion — and it’s turning out to be full of surprises.

Just four minutes of darkness was enough to confuse dozens of species of birds.

Ancient iron-metabolizing microbes may have turned toxic oxygen into an energy source.

The team behind Europe's Euclid space telescope just published the world's most extensive simulation of the universe, which maps an astonishing 3.4 billion galaxies.

A new study suggests that, without plate tectonics and the right balance of carbon dioxide and oxygen, advanced alien civilizations may be exceedingly rare.

Scientists didn't expect to find the remnants of an icy world around this extremely dense white dwarf star.

Natural geologic processes at Mars' Oxia Planum may improve the Rosalind Franklin rover's chances of detecting organic compounds.

Alien objects may be seeding the universe. Here's what that means.

Yes, even Jupiter's moons produce auroras.

Data from NASA's InSight lander suggests there's a chunky mix beneath the surface of Mars.

The interstellar visitor appears to have a lot in common with its solar system brethren.

Scientists have solved how molten "raindrops" in meteorites, called chondrules, were formed — and the discovery reveals key details about Jupiter's origin.

While observing the Halley-type comet 12P/Pons-Brooks with ALMA and NASA's Infrared Telescope Facility, researchers determined that the comet's water is strikingly similar to the water on Earth.

A new study finds that liquids other than water might be able to support life on worlds beyond Earth, potentially expanding the envelope of life throughout the cosmos.

ESA's Mars Express spacecraft has been imaging the dynamic Acheron Fossae region of Mars for more than 20 years.

Scientists have developed an algorithm called Astroclimes, which transforms stargazing instruments into climate sensors that measure greenhouse gases in Earth's atmosphere.

Astronomers using NASA's James Webb Space Telescope have found strong evidence for a new exoplanet — one orbiting Alpha Centauri A, the nearest sun-like star to Earth.

Meet the astonishing phenomenon of megaflash lightning.

Living in space changes the human body — but arteries seem particularly resilient to microgravity's effects.

Astronomers have long voiced concerns about Starlink's satellite constellation interfering with observations of the universe, and a new survey by Curtin University confirms those fears.

The letter warns that the proposed FY2026 budget would halt dozens of missions, gut future programs and threaten U.S. leadership in space science.

The Vera C. Rubin Observatory's first images will be unveiled on Monday (June 23), and you can watch the action live.

One region of the continent saw a 22% decline in emperor penguin numbers over 15 years.

NASA's Perseverance rover regularly images a Sherlock Holmes–themed maze to calibrate its chemical-hunting SHERLOC instrument.