context: Red dwarfs are quite different from other stars. The mass of red dwarfs does not exceed a third of the solar mass (the lower mass limit is 0.0767 [1] [2] M☉, then brown dwarfs come). The photosphere temperature of the red dwarf can reach 3500 K, which exceeds the temperature of the incandescent lamp spiral, therefore, contrary to its name, red dwarfs, like lamps, emit light not of a red, but rather an ocher-yellow hue. Stars of this type emit very little light, sometimes 10,000 times smaller than the Sun. Due to the low rate of hydrogen combustion, red dwarfs have a very long lifespan - from tens of billions to tens of trillions of years (a red dwarf with a mass of 0.1 solar masses will burn 10 trillion years) [2]. In red dwarfs thermonuclear reactions involving helium are impossible, so they cannot turn into red giants. Over time, they gradually shrink and heat up more and more until they use up the entire supply of hydrogen fuel, and gradually turn into blue dwarfs, and then into white dwarfs with a helium core. But not enough time has passed since the Big Bang so that the red dwarfs could get off the main sequence.
question: What size is Red Dwarf?
answers.text: The mass of red dwarfs does not exceed a third of the solar mass