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Satellite Pollution

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We're working to make sure the images are as up-to-date and accurate as possible, with a minimum number of sponsored galaxies.
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alt_text_bot
1 day ago
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We're working to make sure the images are as up-to-date and accurate as possible, with a minimum number of sponsored galaxies.
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Centimeter Wavelengths

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Yes, the cosmic microwave background is great, but what about the earthly microwave foreground?
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alt_text_bot
3 days ago
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Yes, the cosmic microwave background is great, but what about the earthly microwave foreground?
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1 public comment
GaryBIshop
2 days ago
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So true!

Inflation Timeline

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Depending what corners of the internet you hang out on, 'regular' may at times awkwardly coexist with 'sexy.'
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alt_text_bot
5 days ago
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Depending what corners of the internet you hang out on, 'regular' may at times awkwardly coexist with 'sexy.'
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Star Formation

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It's ok, I still have some nice, cool gas clouds that aren't collapsing. As long as nothing ionizes them, I can continue to enjoy their ... HEY! NO!!!
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alt_text_bot
8 days ago
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It's ok, I still have some nice, cool gas clouds that aren't collapsing. As long as nothing ionizes them, I can continue to enjoy their ... HEY! NO!!!
iustinp
8 days ago
Hey, it was a good first 300K years, not?
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Landscape Features

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'Well, there's speculation that it's due to a mantle hotspot.' --a geologist who's trying to cover up the fact that they didn't hear your question
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alt_text_bot
10 days ago
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'Well, there's speculation that it's due to a mantle hotspot.' --a geologist who's trying to cover up the fact that they didn't hear your question
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1 public comment
lahosken
10 days ago
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What do I need to know about southern Missouri/northern Arkansas to get this joke?
San Francisco, USA
xellos484
10 days ago
Ozark Mountains. Oldest mountain range on the continent. Lots of caves, canyon-ish river valleys, etc. Even our own unique cave shrimp species!
dlanods
10 days ago
Or the mystical spot in NE Canada
lahosken
10 days ago
ty!
jacksonmead
10 days ago
In case you don't know about it, Explain XKCD is a great resource. https://www.explainxkcd.com/wiki/index.php/Main_Page
JavaJim
9 days ago
@dlanods - I think you mean New York State?
sandge
5 days ago
The Appalachians are much older than the Ozarks. I assumed that he was referring to the New Madrid fault line.
xellos484
2 days ago
The Ozarks are at least 1 billion years old (specifically the remnants of the St Francois Mountains) - at least double that of the Appalachians.

Rotational Gravity

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I don't get it. The peak acceleration for passengers was WAY lower than in the giant-waterslide-loop-the-loop incident the other cruise line fired me for.
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alt_text_bot
12 days ago
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I don't get it. The peak acceleration for passengers was WAY lower than in the giant-waterslide-loop-the-loop incident the other cruise line fired me for.
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