🌌 NASA Astronomy Picture of the Day
Black Holes in Galactic Centers
Date: 1997-01-14

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?







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