This type of stars cover the vast majority of the stars in the Universe and have a diameter and weight less than 1/3 of that of the Sun (the smallest reach 0.08 solar masses and below the notional boundary are called brown dwarf) and surface temperature below 3500K . They emit less light, sometimes under 1/10 000 that of the Sun. Due to the fact that red dwarfs burn hydrogen in their nucleus very slowly, they have very long life (from tens of billions to trillions of years). Red dwarfs never begin the synthesis of helium in their nucleus and for this reason they do not turn into red giants.This type of stars slowly shrink and heat up while exhausting hydrogen in their core.
One day and the last star will die, and there will be darkness in the Universe forever.
This last star will most likely to be a red dwarf – a small and relatively cold star of the main sequence, a late K or M spectral class. What’s more – the Planets around it are one of the most suitable places where we could find extraterrestrial life. Or even a home of humankind before our own Solar System has become uninhabited.
What do we know about red dwarfs and why are our last hope? This interesting video of Kurzgesagt – In a Nutshell will tell you more on the topic.
