Only a small percentage is visible as the stars, gas and dust; the rest is held in a large yet
invisible dark matter halo.
«For example, the Milky Way should be surrounded by hundreds of small,
invisible dark matter halos, but we have so far only detected less than 50 galaxies,» says Yozin.
Not exact matches
The best explanation is that almost 90 % of the total mass of the galaxy is an
invisible substance, spread throughout the
halo, called
dark matter.
ALMOST two years ago, the astronomical world was set alight by the discovery of dim, point - like objects called MACHOs in the
invisible halo of
dark matter that surrounds our Galaxy (This Week, 25 September 1993).
Most large spiral galaxies, including our Milky Way, have a
halo of
invisible, or
dark,
matter surrounding the visible stars.
Ancient black holes, dwarf galaxies and
invisible halos might unlock the secrets of
dark matter.