Scientists can't fully agree on what GJ504b actually is. It may be a massive planet or a brown dwarf, a mysterious class of ...

The Hubble Space Telescope has made multiple observations of exoplanet WASP-121 b, also known as Tylos. The extreme ...

There are "vast hidden magma systems" inside of Mars, scientists say – and it could have major implications for the search ...

The planets are extremely large, with TOI-791 b being about the same size as Jupiter, and TOI-791 c even larger. Yet, they ...

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...

Reactions asked, "What are we even doing?" after a judge blocked Trump's order creating a database to ensure non-citizens can't vote.

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

A strange interstellar comet discovered last year and speculated by a prominent astronomer to be an alien spacecraft could be ...

An interstellar comet that blazed past the sun and swung by Earth last year could be nearly three times older than our solar ...

SETI scientists searched the interstellar object 3I/ATLAS for radio signals that could indicate extraterrestrial technology ...

As for those salt clouds, the salt is not table salt or even Pink Himalayan Rock Salt, though that would go splendidly with ...

Even at this early stage in our spacefaring age, humanity has already begun sending probes that will eventually reach other ...