Top Image compliments of NASA and bottom image compliments of California, Berkeley
Black holes were first discovered with radio telescopes. The first scientific proof of Black Hole existence at the center of our galaxy was demonstrated indirectly by measuring how observable objects moving around a central area in space. While the Black Hole cannot be observed directly, scientists pain-stakingly mapped the orbits of enormous stars orbiting the Black Hole (eg. lower image).
They also provide a good description of the anatomy of a Black Hole, the event horizon, the accretion disk and what happens to objects that get too close.
Extremely bright objects initially discovered using radio telescopes called Quasars, were actually Black Holes.
They also discovered that the mass of a Black Hole at the center of most galaxies is directly related (linear relationship) to the mass of the galaxy surrounding it. It has been determined that the mass of a Black Hole is consistently approximately 0.5% of the mass of its galaxy. This is extremely important and may indicate that the size of the galaxy is controlled by the size of it's black hole at the center.
At this writing, a massive cloud of gas is approaching the center of our Milky Way. A super-massive black hole called Sagittarius A is at the center. As the massive gas cloud approaches Sagittarius A, at the center of our Milky Way it will give astronomers incredible insight on how a Super Massive Black hole devours mass. In fact with this huge injection of gas (approximately the volume of the Earth) our Black Hole should get much brighter as friction of mass in the accretion disk increases to create a searing plasma.
This should be very ineteresting.
Maddalena Environmental Inc.