The mysterious Universe…
Simplistically, the number of galaxies in the universe will be the size of the Universe times the average number density of galaxies. In practice, it is difficult to estimate these two numbers accurately.
The total size of the universe is unknown. Recent research suggests it may be infinite, implying that there could be an infinite number of galaxies.
It is estimated that the ‘observable universe’ is a sphere with a diameter of about 92 billion lightyears and a volume of about 410 nonillion (410 thousand billion billion billion) cubic lightyears! A lower estimate of the number of galaxies says that there are between 100 and 200 billion galaxies in the observable universe.
Other astronomers have tried to estimate the number of ‘missed’ galaxies in previous studies and come up with a total number of 2 trillion galaxies in the universe.
Dr Alastair Gunn is a radio astronomer at the Jodrell Bank Centre for Astrophysics at the University of Manchester. February 10, 2023
We are all Interconnected even with the Universe 
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