A sci-fi idea is gaining supporters, from billionaires to city councils. Whether it's feasible is another matter.

For decades, the search for alien intelligence has revolved around the question: if someone out there is listening, how could ...

Did you know that the current CO2 concentration in the Earth's atmosphere has peaked in the last million years? A further ...

Data from the James Webb Space Telescope on exoplanet K2-18b has revealed the "strongest hints yet of biological activity ...

That raises the possibility that the TRAPPIST-1e exoplanet could also have liquid water and therefore support life.

Astronomers are researching an Earth-like exoplanet that could contain water, according to NASA. The exoplanet, named ...

The Kuiper Belt is loosely defined as a doughnut-shaped swath of space beginning just beyond the orbit of Neptune and ...

Interstellar objects like 3I/ATLAS that have been captured in planet-forming disks around young stars could become the seeds ...

The coldest planet in the Solar System is Uranus, which is surprisingly colder than Neptune due to its unique internal heat ...

These celestial wonders can tell us a lot about the state of the atmosphere at home on Earth as well as on other planets.

The "potentially hazardous" asteroid 2025 FA22 will fly close past Earth at more than 24,000 mph on Thursday (Sept. 18). The ...

There are quite a few other places we might find life in the solar system, including dwarf planets like Ceres. Ceres is ...