Or "Antarian " stars are of a reddish colour, such as Antares, Betelgeux, Mira, and many of the long-period variables.
Some authorities, however, consider the Antarian (Type III.) stars to be in a very early stage of development and to precede the helium stars in the order of evolution; in that case they are in the stage when the temperature is still rising.
If the latter are considered to be in an early state this presents no difficulty; but if both Antarian and carbon stars are held to be evolved from solar stars, we may consider them to be, not successive, but parallel stages of development, the chemical constitution of the star deciding whether it shall pass into the third or fourth type.
And in 1895, he set apart, as in the earliest stage of growth, a new class of " helium stars," supposed to develop successively into Sirian, solar, Antarian, or alternatively into carbon stars.