[HN Gopher] Astronauts face unique visual challenges at lunar So...
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Astronauts face unique visual challenges at lunar South Pole
Author : pseudolus
Score : 46 points
Date : 2024-12-27 15:56 UTC (2 days ago)
(HTM) web link (phys.org)
(TXT) w3m dump (phys.org)
| JoeAltmaier wrote:
| Did they consider a helmet filter that put a dark spot over the
| sun dynamically? Perhaps with an lcd layer.
| peddling-brink wrote:
| For 20 years, I've wondered why we don't have that in cars.
| tseid wrote:
| Its a tough feature to implement- the sun's position in the
| glass depends on your perspective as well, not just the sun's
| position in the sky.
|
| Easier to do in a helmet than in a windshield, I suppose.
| eemil wrote:
| Perspective shouldn't be a problem. Some cars already do
| eye tracking, using a camera placed near the gauge cluster,
| as part of a driver monitoring system.
| LorenPechtel wrote:
| Eye tracking isn't enough--you need to know where the
| eyes are, not where they are looking.
| ralphc wrote:
| I forget which one, but there's a Larry Niven science fiction
| story that uses this as a plot point. Our hero takes advantage
| of the sun blocker spot on the villian's plane or ship by
| approaching in the line of sight of the planet's sun.
| all2 wrote:
| I believe this strategy was also used in WWI, but just hiding
| in the glare of the sun.
| aaronbrethorst wrote:
| https://en.wikipedia.org/wiki/Manfred_von_Richthofen
| FredPret wrote:
| "Beware the Hun in the Sun" is apparently what Allied
| pilots used to say.
|
| https://www.rafmuseum.org.uk/research/archive-
| exhibitions/wo...
| Polizeiposaune wrote:
| Grendel, one of the stories in Neutron Star, set on a planet
| orbiting a very bright star where everyone has to wear
| protective goggles with sun-tracking black dots for each eye.
|
| Our hero needs to steal the bad guy's (flying) car, at sunset
| and circles until his shadow points at the car..
| 1970-01-01 wrote:
| This is a very old fighter pilot tactic.
|
| https://en.wikipedia.org/wiki/Sun_position_(air_combat)
| OldGuyInTheClub wrote:
| Imagine blocking the infestation of billboards on earth with a
| dynamic shade.
| asimpleusecase wrote:
| In some place the entire windscreen would be blacked out
| OldGuyInTheClub wrote:
| Yep, that's the case in many parts of Southern California.
| tgv wrote:
| Reminds me of the peril-sensitive glasses in H2GT2G: "At
| the first hint of trouble, they turn totally black and thus
| prevent you from seeing anything that might alarm you."
| pizza wrote:
| They Live!
| aporetics wrote:
| That moment while driving when the pavement is wet and the sun is
| at a low angle and suddenly the ground is as bright as the sun
| and you can't see anything. But all the time!
|
| It sounds more complicated than just figuring out how to prevent
| glare. Even if you do that, the terrain will always be
| illuminated in this strange high contrast scenario. I find myself
| thinking about how photographers use reflectors to avoid this in
| their portrait subjects.
| imoverclocked wrote:
| Meanwhile, solar panels might be super efficient because they
| get to use the moon as a giant reflector. Shedding heat will be
| an interesting problem though... perhaps thermal panels and
| Stirling generators instead of PV? They could save a bunch of
| weight by just using the water-ice when they get there. Sounds
| like a fun project to work on!
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(page generated 2024-12-29 23:02 UTC)