-------------------------------------------------------
answers:
Quadrillian say: Instead of being intellectually lazy and taking the easy way out by blaming every unexplained emission on the hypothetical "black holes", we should be open to other possible explanations.
Science should not be a religion where be ascribe every unexplained observation to some mythical space monstrosity in much the same way that religious folks ascribe every explanation they can't get their head around to some divine man up in the sky.
Cheers!
-
Morningfox say: Actually, Sgr A* is a bright radio source in orbit around a black hole. It could be in the accretion disc, or it could be a relativistic jet from the disc.
-
digquickly say: Well, ..., This is a great question. First: black holes do exist.
However, I believe your question may be stemming from some of the recent articles that claim they do not exist. If you'll read those articles a little more closely you see that it is not that black holes don't exist rather it's the "Theoretical Model" of a black hole that doesn't exist nature. In other words, when it comes to nature, the thing we call a black hole will not necessarily conform to a model. It will be like it but not exactly like it.
Think of it like the fruit known as an apple. When I say the word apple there is mental picture that may pop into your mind. e.g. has stem, color red, tastes sweet, falls from tree, has seeds in center, Shape: Round at top and tapering towards bottom. And this may nearly fit the variety known as "Red Delicious" However, a Granny Smith apple, Color green, shape: Oblate Spheroid, has seeds, has no stem, taste: tart. Falls from tree only meets some of that criteria yet it is still an apple.
Black holes may behave exactly the same way in nature which is why the theoretical model may not exactly describe how a black hole, as it exists in nature, may behave.
-
Nyx say: An ultra high gravitational gradient.
-
quantumclaustrophobe say: If black holes don't exist, the Sagittarius A* is one of the largest, densest, non-existent objects we're aware of.
-
User say: assuming blackhole doesn't exist, then it would be a big star as a parent to another stars that orbiting it and make it looks more bright in the sky.
you know, celestials object that more massive than jupiter could be formed as a star. so it's possible for stars to orbiting one massive star as it satellites, which is make it so bright from our observation.
-
Acetek say: Black holes do exist and Sagittarius A is a black hole
-