“Did you know that the center of a Protostar (the star in the middle of a nebula) is called a Nuclear Furnace? So you can call that the star's "heart." The heart of a star is a furnace. Not much unlike the human heart.” Inspirational QuotesStarsAstronomyNebulaThe Human HeartNuclear FurnaceProtostarThe Heart Of A Star Author:C. JoyBell C.