Caridorc Tergilti

Karma: 47
• I am not really sure about that. There is not only a huge money cost but also a huge energy cost when sending something into orbit, would the panels even make back the fuel spent to send them? Even if the rocket hardware is reused 100% with no serious maintenance costs (reusing costs more fuel) would the panel even make back that fuel energy alone? I did not do the math but maybe not even that. If we could put them in orbit with a space elevator almost for free the tune would be way different though.

• Very good point: I think the website I linked to refers to peak power, so the Kilowatthours would be lower. (not sure on this, sorry)

• If the panels on orbit last double the time and produce double the energy that is only a factor of 4, while the system is about 300 times more expensive. (but again you have transmission losses that I did not consider)

• Let’s have fun with recursion!

A checkerboard where each square is itself a checkerboard.

A cube with mirrors on both sides, the mirrors show multiple reflections of the cube.

A person wearing a shirt with an image of that person wearing that shirt.

• Let’s have fun with recursion!

A checkerboard where each square is itself a checkerboard.

A cube with mirrors on both sides, the mirrors show multiple reflections of the cube.

A person wearing a shirt with an image of that person wearing that shirt.

• Thanks for your feedback, in fact correlation is not causation and we must be very careful about self-selection effects. This is not a self-selection effect but still a correlation/​causation enigma that I found interesting in recent times: high vitamin D levels were found to be heavily anticorrelated with severe COVID in observational studies, but people of old age are both sensible to severe COVID and have lower vitamin D than average, not only that but people with a healthy lifestyle of many outdoor walks also have higher vitamin D! Is this causation, correlation or both? There is a very interesting article about this on Astral Codex 10 (COVID/​Vitamin D, Much More Than You Wanted To Know)

• Hi, I wrote the Book-Review on Spark as my first post on LessWrong. Sadly I received no comments in response to it and I would love some feedback after spending so much time writing it. I am open to any kind of feedback about it. I really enjoyed this bounty program and I will probably partecipate also in the future ones.

Book Re­view: Spark! How ex­er­cise will im­prove the perfor­mance of your brain

1 Oct 2021 22:43 UTC
16 points