How We Know How Many Galaxies Are In The Universe, Thanks To Hubble

How We Know How Many Galaxies Are In The Universe, Thanks To Hubble

"We find that there are 170 billion galaxies in the observable Universe, and that’s just a lower limit. Given that there’s an astonishing amount of Universe out there that Hubble cannot yet see — and that it can only see the brightest of the most distant galaxies — we may yet find closer to 10^12 (or a trillion) galaxies within our visible Universe. And given that there are hundreds of billions of star within our own galaxy, that teaches us there are some 10^23 stars in the Universe,"