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Galaxies

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I know it seems overwhelming, but don't worry; I'm sure most of them have only a few stars, and probably no planets.
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selinashetty
255 days ago
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Lakshyaiasacademy
253 days ago
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CblackFeed42
260 days ago
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I <3 Astronomy
Portland, OR.
jlvanderzwan
262 days ago
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Observable galaxies, surely?
DrGaellon
262 days ago
Well, by definition. If they're not observable in SOME fashion, surely we can't know they're there or count them?
jlvanderzwan
261 days ago
We can predict how many galaxies there should be based on physics. Anyway, my point was more that if we assume the universe is infinitely large and roughly uniform in density that it should have *infinite* galaxies in every direction
jlvanderzwan
261 days ago
... but most are outside of the observable universe, because light speed and cosmic inflation
Secularick
261 days ago
And unless something drastic changes, the horizon of observability is closing in on us, such that eventually our galaxy will be all that is knowable to its citizens, if any survive that long. In other words, there may be 50,000 galaxies in that circle *today,* but over time, that number's going to be fewer and fewer (for all practical purposes).
davidar
261 days ago
And if they aren't observable then arguably they no longer even exist from our perspective.
silberbaer
261 days ago
The universe is flat. If you can't observe a galaxy, it's gone and fallen off the edge of the universe.

Saturday Morning Breakfast Cereal - Dunno

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People also say Bigfoot, but Bigfoot is actually just a type of alien ghost.


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