Two Trillion Galaxies

than Siegel

The Universe is: Expanding, cooling, and dark. It starts with a bang! #Cosmology Science writer, astroommunicator & NASA columnist.

Oct 25

Artist’s logarithmic scale conception of the observable universe. Galaxies give 

way to large-scale structure and the hot, dense plasma of the Big Bang at the 

outskirts. Trying to figure out how many galaxies exist within the Universe is 

one of the great cosmic quests of our time. 

(WIKIPEDIA USER PABLO CARLOS BUDASSI)

This Is How We Know There Are Two Trillion Galaxies In The Universe

Hubble, even at its best, only reveals perhaps
10% of what’s out there. Here’s how we get
the rest.

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When you gaze up at the night sky, through the veil of stars and the plane of the Milky Way close by, you can’t help but feel small before the grand abyss of the Universe that lies beyond. Even though nearly all of them are invisible to our eyes, our observable Universe, extending tens of billions of light years in all directions, contains a fantastically large number of galaxies within it.