STELLAR ASTROPHYSICS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site horizontal branch The part of the Hertzsprung-Russell diagram of a typical globular cluster; it contains stars with masses of 0.6 to 0.8 solar masses that are hotter and fainter than those on the giant branch. A star appears on the horizontal branch after it has undergone its helium flash and begun to burn helium steadily in its core and hydrogen in a surrounding envelope. Related category    • STELLAR ASTROPHYSICS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP