GALAXIES 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 dark halo Artwork showing the approximate extent of the dark matter halo around a large spiral galaxy such as our own. Credit: Jose Wudka The massive outer region of the Milky Way Galaxy that surrounds the disk and stellar halo. The dark halo consists mostly of dark matter, whose form is unknown. Though it emits almost no light, the dark halo outweighs the rest of the Galaxy by a factor of approximately 20 to 1. Similar halos of nonluminous matter appear to surround and envelope other large galaxies. See also galactic halo. Related category    • GALAXIES Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP