Habitable planets around red dwarf stars might not get enough photons to support plant life

In recent years, the number of extra-solar planets discovered around nearby M-type (red dwarf stars) has grown considerably. In many cases, these confirmed planets have been “Earth-like,” meaning that they are terrestrial (aka. rocky) and comparable in size to Earth. These finds have been especially exciting since red dwarf stars are the most common in the universe – accounting for 85 percent of stars in the Milky Way alone.