New planet possible of having life being. Yay! But its classification of the star caught my attention since I thought Red Dwarf is just a dodgy UK SF TV show but looks like is an actual cosmological terminology.

Gliese 581 is a dim red dwarf star, like Gliese 623 A (M2.5V) and B (M5.8Ve) at lower right.

and more: According to the Hertzsprung-Russell diagram, a red dwarf star is a small and relatively cool star, of the main sequence, either late K or M spectral type. ...