The trans-Neptunian object Altjira, 44 times farther from the Sun than Earth is, could be the second known trinary, ...

Why do comets and their meteoroid streams weave in and out of Earth's orbit and their orbits disperse over time? In a paper ...

The constellation of four satellites can take both narrow- and wide-field images of the Sun to study its corona and solar ...

Researchers have developed a new coronagraph — an optical device that blocks out light from a bright source — that could make ...

A new AI model from the University of Bern predicts planetary systems likely to host Earth-like planets. It could boost the ...

A distant planet's atmosphere shows signs of molecules that on Earth are associated only with biological activity, a possible signal of life on what is suspected to be a watery world, according to a ...

The Colorado River system is the lifeblood of the southwest, delivering water to 40 million people across the United States ...

Uranus Findings Can Aid the Study of Exoplanets Now more than 30 years into its mission, the Hubble Space Telescope has ...