PhoenixReborn

PhoenixReborn t1_je2sv0w wrote

>Astronomers think that's too high for the planet to have an atmosphere." Err, Venus?

It's not that a high temperature prevents an atmosphere. The high temperature on the day side is evidence against an atmosphere. A dense atmosphere would redistribute heat around the planet, resulting in a cooler day side. That's not what was observed.

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PhoenixReborn t1_jdwsr9l wrote

Would that be consistent with the thermal measurements? Sounds like there isn't as much heat exchange between the day and night sides of the planet as there would be with an atmosphere.

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PhoenixReborn t1_j3y3hwz wrote

There was a segment on our local NPR station the other day about this.

https://www.kqed.org/forum/2010101891818/flooding-during-a-drought-rethinking-californias-water-system

One of the things they mentioned was having to strike a balance between pumping water from the Sacramento–San Joaquin River Delta for human use, and maintaining enough water flow to the bay to prevent backfill with salt water. One of the guests wrote an op-ed arguing for intelligent land use to allow water to refill the water table.

https://www.nytimes.com/2023/01/07/opinion/california-flood-atmospheric-river-drought.html

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PhoenixReborn t1_j220fxy wrote

The chemistry is quite beyond me, but I don't see how this is "actual proof that this is what happened." As far as I can tell, they identified that this asteroid is similar to other water-rich asteroids and more intact than samples fallen to Earth. It suggests this type of asteroid is more common than previously thought. I'm not seeing the conclusive evidence here of the origin of water on Earth.

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