Red dwarfs are the most common type of star in the galaxy. But new research suggests that life within these systems may be limited, due to the stiflingly hot atmospheres on Earth-sized planets that orbit the red dwarfs.
When we look up into the sky at night, we only see a small portion of what’s actually out there. Even though red dwarfs comprise over three-quarters of all stars in the Milky Way, not a single one of them is visible to the naked eye. These stars may be small and dim, but they still feature planets, including many that are Earth-like in terms of size and composition. Given their ubiquity, astrobiologists have speculated that a hefty portion of alien life, should it exist, may reside in red dwarf systems.