A video to go along with the last post:

How do we know how many galaxies there are in the Universe? The Hubble telescope helps us understand.

Did you know that the Hubble is so sensitive it could see a firefly on the Moon?

(by ethansiegel)

Source: youtube.com

80 Notes/ Hide

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  23. mdt said: But potentially the majority of galaxies are moving away from us to fast for them to be visible… Such is the rate of expansion in the universe. Or so I hear.
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