Black Holes and Galactic Centers
Explanation:
Do all galaxies have black holes at their
centers? Although not even a single galaxy
has yet been proven to have a central
black hole,
the list of candidates has increased yet again.
Recent results by astronomers using the Hubble Space Telescope
now indicate that most - and possibly even all - large galaxies
may harbor one of these
dense beasts.
In all the galaxies studied, star speeds continue to increase
closer the very center. This in
itself indicates a center millions of times more massive than
our
Sun is needed to contain the
stars. This mass when combined with the limiting size make the
case for the central
black holes.
Will we ever know for sure?
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.
