star classObservedMeasured or catalogued in the real sky, with its source cited.SimWhat the simulation generates or renders; it may depart from reality and says where.
Red dwarf
A small, cool, faint main-sequence star of spectral class M, between about 8% and 60% of the Sun's mass. Red dwarfs are about three quarters of all stars, live for trillions of years, flare violently when young, and host many of the nearest known rocky planets.