NASA's discoveries reveal water's prevalence beyond Earth, from subsurface oceans on moons to vapor in exoplanet atmospheres.

The search for life beyond Earth is a holy grail quest for many experts, but finding where to look is a core issue.

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

In about 4.5 billion years, the Sun will enter its red giant phase, swallowing Mercury and Venus and rendering Earth ...

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

It was a simple question asked over lunch in 1950. Enrico Fermi, the Nobel Prize-winning physicist who helped usher in the ...

A super-Earth with extreme climatic conditions has been identified 2,472 light-years from our planet. This world, named ...

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