The Cool Science Stuff Thread


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NPR gives James Webb Space Telescope a lovely write-up

December 21, 2021

(just a taste, of what the article is offering. It's filled with interesting info/graphics)

Why the telescope needs to be so cold

To understand why the telescope needs an unprecedented sunshield,
it's important to know what kind of light the telescope is picking up
and what kind of instruments are needed to do so.

Scientists will use the telescope to study infrared light emitted by
distant planets and galaxies — and the infrared technology has to be
kept absolutely frigid.

The temperature needs to be close to absolute zero, when molecules
essentially stop moving. This extreme temperature is needed for the
telescope's scientific instruments to work correctly and to minimize
infrared background "noise" — like heat from the sun —
being picked up by the infrared sensors.

"As light travels through the universe ... the light waves elongate
and it shifts into the infrared, which is heat."

- Bill Ochs, the James Webb Space Telescope project manager

https://www.npr.org/2021/12/21/1064183308/james-webb-space-telescope-sunshield-launch
 
41% of Neanderthal genome persists in modern humans. This surprised me...but does make total sense. True...any one individual only contains around 3%...the region each person has differs among individuals.

https://youtu.be/54zB8FOlFcE
 
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