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A comment on 43 km line of sight with USB WiFi stick (2005). Parent comment

Re:43 km line of sight with USB WiFi stick (2005) by lultimouomo on Thursday March 03, 2022 @03:20PM (#30546375)
Vacuum is good, but inverse-square law still applies.

There is almost perfect vacuum between Earth and every star in the galaxy, and yet they don't appear nearly as bright as the Sun.

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Re:43 km line of sight with USB WiFi stick (2005) by thfuran on Thursday March 03, 2022 @03:23PM (#30546427)
But you can see the Andromeda galaxy, which is several quintillion miles away.
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Re:43 km line of sight with USB WiFi stick (2005) by josephg on Thursday March 03, 2022 @04:00PM (#30546935)
Sure, but the andromeda galaxy doesn’t have a power budget of 20 watts.
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Re:43 km line of sight with USB WiFi stick (2005) by Sporktacular on Friday March 04, 2022 @06:23AM (#30553266)
Some photons would make it, just not frequently enough to ascertain any information.
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