Claude Fable, the company's most powerful model, is now available to all users, but early impressions are disappointing, as ...

Second only to black holes, neutron stars—incredibly dense star remnants—are the densest objects in the universe. When ...

How much can the United States really see from space? The answer is partly known, partly inferred, and partly locked behind classified walls. The KH-11 KENNEN, a U.S. reconnaissance satellite family ...

For decades, astronomers wondered why most nearby galaxies are speeding away from the Milky Way instead of being pulled in by its gravity. New simulations reveal the answer: our galaxy sits in a ...

New simulations suggest that matter just beyond our Local Group of galaxies is arranged in a vast, flattened structure, with large empty regions above and below it. This hidden geometry helps explain ...

Computer simulations carried out by astronomers from the University of Groningen in collaboration with researchers from Germany, France and Sweden show that most of the (dark) matter beyond the Local ...

Quantum computers may help us see more exoplanets – and see them in more detail too. Astronomers have now found thousands of planets beyond our solar system, but they anticipate that there are ...

A test model of the Perseverance rover, designed to explore the surface of Mars, sits in a garage at NASA’s Jet Propulsion Laboratory, near Pasadena, California, in October. This article was featured ...

Scientists at the University of Colorado Boulder may have solved a pressing mystery about the universe’s gravitational wave background. That’s the name for the ripples in space and time that move ...

In order for NASA to study the mysteries of the universe, the scientists there need to be able to look out into the cosmos. The Hubble Space Telescope did this for a time, giving humanity some ...

An image simulating the contamination from satellite trails in observations by ARRAKIHS, a European Space Agency telescope planned to launch in 2030 NASA / Borlaff et al., Nature, 2025 under CC ...