As far as we know, most, if not all galaxies have a massive black hole at their centre.
I don't think there is a galaxy called "Satan A"; at least, not as a standard name, generally accepted by astronomers. On the other hand, most larger galaxies have a supermassive black hole at its center, and it can be expected that any galaxy has several stellar black holes.
It is currently believed that all spiral galaxies have a supergiant black hole at their centers and all galaxiesand globular clusters have several ordinary black holes scattered throughout them.
quasar
The supermassive black hole at the center of our Milky Way galaxy may not have a formal name yet, but takes its identification from a powerful radio source "Sagittarius A*" (where the asterisk is part of the name). Because of the discovery of this energy source it's commonly believed a black hole must be located there, powering the emissions perhaps because of the black hole's accretion disk or relativistic jets.
black hole got it's name because when look at a black hole, you only see black. also if you drop an item in the black hole the item is gone because there is a hole in there. so that's how black hole get's its name
When you talk about astronomical objects, it is usually more appropriate to talk about their mass, not their weight. A quasar is powered by a supermassive black hole; those have a mass of millions or billions times the mass of our Sun.
It is likely that there is more than one black hole in our galaxy, but the one believed to be in the centre is called 'Sagittarius A*' (A Star). However, if it is not a black hole, then 'Sagittarius A*' refers to whatever it is found to be instead.
A spiral galaxy, as its name implies, has one or more spiral arms that stretch out from the center. The center often contains a bulge of stars and sometimes can even contain an active black hole.
A M64 is a spiral galaxy known as the Black Eye Galaxy.
they are black and their bottomless!
It was simply called 'The Galaxy'.
One that is fairly famous is Sagittarius A* - the supermassive black hole at the center of our Milky Way, about 26,000 light-years from here, and with a mass of about 4 million solar masses. For additional black holes, check the Wikipedia article "List of black holes".