Carl Sagan emphasized the existence of countless stars and galaxies, coining the phrase 'billions and billions', which has shaped our understanding of the Universe's vastness for decades.
Recent observations from the Hubble eXtreme Deep Field have radically increased our estimate of the number of galaxies, suggesting we may have missed a staggering number of smaller, fainter galaxies.
The theoretical calculation of 2 trillion galaxies has already been deemed insufficient, with astronomers proposing that the real number might be anywhere from 6 trillion to 20 trillion.
Understanding the universe's structure begins with acknowledging its finite observable portion, despite its immense size and complexity shaped by gravitational forces over billions of years.
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