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Russian Satellite Hit by Debris from Chinese Anti-Satellite Test

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Re: Russian Satellite Hit by Debris from Chinese Anti-Satellite Test

#31

Post by sadfasdfa »

mappu wrote: post #3

There's a very good 2003 sci-fi anime called Planetes[1] that explores the problem of space debris in some detail, and how humanity might deal with it in the future. Highly recommended if you're interested in these issues. 1. http://myanimelist.net/anime/329/Planetes

Thank you Sir for your very valuable recommendation. As a fan of Anime, specially SciFi Anime, I am eternally grateful to you for pointing me to this Anime. May the stars grant you eternal bliss.

By the way, even though this is a tangent, could you please name other Animes that you believe would be of interest? I'm sincerely interested in hearing any of your recommendations.

Anybody else feel free to chip in.

Re: Russian Satellite Hit by Debris from Chinese Anti-Satellite Test

#32

Post by gngeal »

fhars wrote: post #21
alberich wrote: post #19

Earlier quoted context omitted.

Oh, I thought it was gravity alone that did the work :) Thanks for explaining it.

Gravity doesn't do anything on its own, in the absence of other forces, the orbit of a steel nut around the earth would be stable (that's also why we haven't yet crashed into the sun even after being in its gravitational field for billions of years). (Well, you would get some instability because neither the earth nor the nut are perfect spheres or perfectly rigid, but those effects would take billions of years to bec…

"Gravity doesn't do anything on its own, in the absence of other forces, the orbit of a steel nut around the earth would be stable"

Actually, it wouldn't, because orbiting a celestial body radiates energy in form of gravitational waves, but in case of Earth's gravitational field and at the speed of orbiting satellites, this mode of losing energy is negligible.

Re: Russian Satellite Hit by Debris from Chinese Anti-Satellite Test

#33

Post by fhars »

gngeal wrote: post #32
fhars wrote: post #21

Earlier quoted context omitted.

Gravity doesn't do anything on its own, in the absence of other forces, the orbit of a steel nut around the earth would be stable (that's also why we haven't yet crashed into the sun even after being in its gravitational field for billions of years). (Well, you would get some instability because neither the earth nor the nut are perfect spheres or perfectly rigid, but those effects would take billions of years to bec…

"Gravity doesn't do anything on its own, in the absence of other forces, the orbit of a steel nut around the earth would be stable" Actually, it wouldn't, because orbiting a celestial body radiates energy in form of gravitational waves, but in case of Earth's gravitational field and at the speed of orbiting satellites, this mode of losing energy is negligible.

Yes, but I still think that the tidal deformation of the earth under the gravitational influence of the steel nut will vastly dominate general relativistic effects like gravitational waves. You usually use neutron stars orbiting black holes to produce the latter.
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