Many planets with suitable temperatures for liquid water to exist on their surface were previously either too hot or too cold.
space
January 19, 2023
Two planets orbiting a red dwarf (illustration) NASA/JPL-Caltech
Most of the planets in the so-called habitable zone (the region in orbit around the star) have liquid water on the surface of the world, and the conditions for life may not be present. Hmm. This could mean that we are greatly overestimating the number of worlds that can harbor life.
Researchers often think of a given star’s habitable zone as being relatively static, but it actually changes as the star evolves and its brightness and temperature change. or…
