If the Milky way was reduced to a singularity(all space between mass compressed)how big would it be in size?

Answer 1

Not sure, but the singularity that started our universe was about the size of a dime!

EDIT: According to NASA, it would NOT be infinitely small.

Answer 2

I am unsure what is meant by ( all space between mass compressed ).
I've either read or heard that the atom is mostly space, that is to say that there is a great deal of so called empty space between the nucleus and the electrons. Would that space also be compressed or are you thinking along the lines of space between objects like the planets and stars.

Even if you where thinking of compressing the space in the individual atoms the size of the galaxy would still be quite large ( assuming that the space between the electrons and the nucleus was 100,000,000 to 1 ratio That is to say that the so called empty space in the atom between the electrons and the nucleus occupied 99.99999 % of the volume of any object that would still make the sun in our solar system nearly 2 meters in diameter.
Add that to all of the stars in our galaxy and you would get a very vERY BIG object.

If the space between the electrons and the nucleus was a ratio of 200 billion to 1 and there are 200 billion or more stars in the Milky Way Galaxy then the size of the galaxy if all of this space was removed would be the size of one average size star of the Milky Way Galaxy. Still a large object that could not fit on the planet Earth.

Even if you could reduce that object by a factor of a million or so it would still be larger than the Earth.

Answer 3

A singularity is nonsense invented by the escapist nerds who created the entertaining fantasies of postclassical physics. Such a compressed object cannot exist in 3D, so it must be expelled back to the Fourth Spatial Dimension, where all matter originated.

Answer 4

The entire Universe is mostly empty space. In fact, matter make up an infinitely small amount of the total volume, compared with the empty space around.

Answer 5

infinitesamally small. same as a black hole. the black hole itself has no size. it's equivalent of how big a point is on a graph. that's sorta what a singularity is.
a black hole does have a region around it called the event horizon. it's the area for which light can't escape the gravity of the black hole. so anything that crosses the event horizon gets sucked toward the point where the black hole is, crushing it so that it fits inside the black hole which has the size of a single point. so it crushes to zero

Answer 6

It would not have any physical dimensions.