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Old 2021-06-11, 18:08   #2897
xilman
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Quote:
Originally Posted by Xyzzy View Post
In my view is that it takes skill to explain anything. I'm pretty sure that Richard Feynman could have made an excellent attempt.

At a different level, I have successfully taught basic {QM,GR,topology,group theory,number theory} to friends and relatives, some of whom have been significantly pre-pubescent.

You may, or may not, be surprised at what 6 year old kids can understand if they are taught properly. An important pre-cursor is to explain that everything, absolutely everything, is a simplification. That very much includes what I and their school teachers have to say. If they grasp that concept they are fully prepared for everything they hear afterwards.
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Old 2021-06-16, 17:23   #2898
kriesel
 
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Default Hubble observing stopped by onboard computer issue

https://abcnews.go.com/Technology/wi...alted-78316108

Last fiddled with by kriesel on 2021-06-16 at 17:25
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Old 2021-06-16, 17:53   #2899
kriesel
 
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Default Yikes, skin and hair on the corneas!

https://www.livescience.com/deer-hairy-eyeballs.html
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Old 2021-06-17, 11:40   #2900
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Computing optimal road trips on a limited budget
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Old 2021-06-17, 12:32   #2901
tServo
 
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Astronomers have found enormous rotating structures. They look like tendrils and are composed of galaxies:

https://www.reviewgeek.com/88291/ast...ce/#htg=956752
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Old 2021-06-17, 13:57   #2902
retina
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Quote:
Originally Posted by tServo View Post
Astronomers have found enormous rotating structures. They look like tendrils and are composed of galaxies:

https://www.reviewgeek.com/88291/ast...ce/#htg=956752
Quote:
... tendrils of galaxies measuring several hundred light-years long ...
So, not actually very large then.
Quote:
... making them—if you can wrap your mind around that—incredibly large.
Wot?

Our galaxy is ~100,000 light year wide. I'd consider that larger than "several hundred" light years.
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Old 2021-06-17, 14:51   #2903
kriesel
 
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Quote:
Originally Posted by retina View Post
So, not actually very large then.Wot?

Our galaxy is ~100,000 light year wide. I'd consider that larger than "several hundred" light years.
Follow the links. "Hundreds of millions of light years across"
https://www.nature.com/articles/s41550-021-01380-6

Last fiddled with by kriesel on 2021-06-17 at 14:52
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Old 2021-06-17, 15:04   #2904
Uncwilly
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Quote:
Originally Posted by kriesel View Post
Follow the links. "Hundreds of millions of light years across"
https://www.nature.com/articles/s41550-021-01380-6
Another case of a 'popular' website that is not careful messing up an important bit of data, while the real data is better.
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