Re: xkcd: Sun Avoidance

On 12/29/2024 8:31 PM, Peter Fairbrother wrote:

On 27/12/2024 06:53, Your Name wrote:

On 2024-12-27 06:03:24 +0000, Lynn McGuire said:

On 12/26/2024 3:57 PM, Ted Nolan <tednolan> wrote:

In article <vkkf06$34sri$1@dont-email.me>,
Lynn McGuire  <lynnmcguire5@gmail.com> wrote:

xkcd: Sun Avoidance
https://www.xkcd.com/3029/
>
“The comic shows the end of a table of human missions, both terrestrial
and space-based, ranked by how far they stayed away from the Sun.”
>
“This comic was posted the day after December 24, 2024, when the Parker
Solar Probe made its closest approach to the Sun. As a result, it has
set a new record for the worst failure in solar avoidance. This mission
needs to be really close to the Sun so it can make close-up analysis of
its corona and magnetic field. It has been engineered with special solar
shields to protect it from the extreme heat and radiation.”
>
Explained at:
https://www.explainxkcd.com/wiki/index.php/3029:_Sun_Avoidance
>
Lynn

>
"North," murmured the captain. "North."

>
What book is that ?  Please it is not a book about a whale.
>
Lynn

>
Mr Google says it is Ray Bradbury's "The Golden Apples of the Sun", which is an anthology of 22 short stories, so I don't know which story it is from.
>

 The story is "The Golden Apples of the Sun".
 "North" is just away from the Sun. They have plucked the apple and can now go home...
 ... unlike the Parker Solar Probe, which will if all goes as planned get close at least twice more, before finally getting close again and exposing its instruments without shielding, which will destroy them. The solar shield will then continue orbiting for a few million years.
 I kinda feel sorry for it, but I am anthropomorphising too much. However for some perhaps not-too-distant future AI controlled probes..

There's four more perhelions scheduled during 2025. I don't think
there's any plan to deliberately destroy it.
It will fail eventually, but the the solar shield is unlikely to
last long when it's backside gets exposed.
The closest listed perhelion is 6.2 million miles above the surface.
there, the sunlight will be 181x as intense as at Earth orbit.
pt