How many Galaxies are there in Universe rather Milky Way Galaxy

The current estimate is in the order of 100-200 billion

Atleast a number in the Many Billions of Galaxys. We can only see 13.5 billion light years in any direction and even then galaxys could have been formed in which the light hasn't reached earth yet,

Also, if we can see 13.5 billion light years and the galaxy 13.5 billion light years from us can see 13.5 billion light years in all directions, then are universe in many times bigger than 13.5 billion light years in radii. The universe is so big it is impossible to know how many galaxys there actually are.

This is an interesting question. The only way to even make an estimate is if you think that scientists were close when they worked out how much mass and energy they think there is in the universe.

They did this based on how hot they think the big bang was when it happened, and the rate at which they think it expanded.

These figures were based on other figures, which were based on other figures, which were based on things like measuring the temperature a certain distance away from a nuclear bomb exploding.

Personally, I think they are so far away from knowing that sort of stuff, it's laughable that they would even suggest they know.

There could be trillions upon trillions of galaxies, and we wouldn't know about it.

Probably hundreds of billions, not all big, a lot of them are small dwarf galaxies. We'll never know for sure as light from some may not have not reached us yet.

Millions or billions, we don't know

Too many to count