Hycean worlds are also called ocean worlds. They're planets covered in oceans that also have thick hydrogen atmospheres.

The researches say that the Hycean Habitable Zone (HHZ), when compared to the terrestrial habitable zone, may include smaller ...

Astronomers have added two more exoplanets to a growing study aimed at finding out whether rocky worlds near small, faint ...

Not only does this research offer new clues about how Earth has maintained the delicate balance needed for life, but it may ...

The strength of Earth’s magnetic field and the amount of oxygen in its atmosphere seem to be correlated—and scientists want ...

During the red giant phase, both the Sun and Jupiter will shine brighter and become hotter. However, its moon Europa is ...

This story is the first article of a two-part Mongabay mini-series exploring possible climate futures. Read Part One.

The search for life beyond Earth is a key driver of modern astronomy and planetary space science. The U.S. is building ...

With 10 times the mass of our planet, and spending only part of its orbit in the habitable zone, Kepler-725c is very ...

The breakthrough came using a cutting-edge observational method that detects unseen planets via subtle deviations in their ...

Researchers say that the Earth's oxygen levels will drop exponentially in the future, ending life as we know it.

A tiny sign revealed in April seemed like it might change the universe as we know it. Astronomers had detected just a hint, a ...