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brightness of Venus
ncc1701d
post Dec 21 2007, 07:28 PM
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I was wondering.
If Venus reflects 70 percent of the sunlight that hits it.
If I was in spaceship on approach to that planet could I look at it with the naked eye out the window and not get blinded?
Would I have to at least use sunglasses?

I am wondering to how much brightness reduction is going on when processing the images before they are release to public or analized.
thanks
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dvandorn
post Dec 24 2007, 07:45 AM
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Many of the Apollo astronauts chose to wear sunglasses when doing a lot of "out of the window" stuff both in lunar orbit and on the surface -- and, of course, the LEVVA visor assemblies had built-in sunglasses (the outer gold-coated visor).

Pete Conrad almost landed on the Moon wearing sunglasses inside his bubble helmet, but all of the standard-issue sunglasses back then were the green-tinted kind, and Pete decided rather late that the green shading washed out too many details. But he indeed removed his helmet and took off his sunglasses just prior to descent.

As for Young, recall that 1) the Descartes landing site was in one of the highest albedo terrain units the Moon has to offer, and 2) by the time they lifted off, Young and Duke were sitting under the highest Sun angle anyone in Apollo would ever see from the surface (owing to their three-rev, six-hour landing slip). Add to that the airlessness, which not only gave the pure black sky in contrast to the brightly lit surface but also allowed full unfiltered Sunlight to beat down. Any place on Earth lit with that kind of unfiltered Sunlight would likely make you "snowblind," as well.

-the other Doug


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“The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Posts in this topic
- ncc1701d   brightness of Venus   Dec 21 2007, 07:28 PM
- - ngunn   I would recommend sunglasses at least. Even at Ear...   Dec 22 2007, 11:14 PM
|- - ugordan   If you were in a spaceship, even Earth would appea...   Dec 23 2007, 12:04 AM
- - edstrick   Something I've worried about is a hazard when ...   Dec 23 2007, 10:31 AM
|- - Stu   QUOTE (edstrick @ Dec 23 2007, 10:31 AM) ...   Dec 23 2007, 10:41 AM
- - J.J.   A pretty interesting question, one I've specul...   Dec 23 2007, 03:46 PM
- - dvandorn   I'd just like to bring into this conversation ...   Dec 23 2007, 04:50 PM
|- - JRehling   The John Young incident is interesting, and not on...   Dec 23 2007, 10:39 PM
- - J.J.   ^ Ditto--and the Sun is twice as bright at Venus...   Dec 23 2007, 05:29 PM
- - dvandorn   Many of the Apollo astronauts chose to wear sungla...   Dec 24 2007, 07:45 AM
- - PhilCo126   Talking about a bright Venus, ESA made a website o...   Jan 2 2008, 05:42 PM
- - PhilCo126   Looking South these winter evenings, You'll no...   Nov 25 2008, 05:42 PM
- - Stu   This is how they looked this time last week from n...   Nov 25 2008, 05:47 PM
- - CAP-Team   Yes, Venus and Jupiter look very nice in the eveni...   Nov 26 2008, 10:04 PM
- - scalbers   I suppose I need sunglasses just being on Earth...   Nov 27 2008, 06:55 PM
- - Enceladus75   I saw a stunning view of Jupiter and Venus in the ...   Nov 27 2008, 10:09 PM
- - bkellysky   Here's Jupiter and Venus, just after sunset on...   Nov 29 2008, 12:24 AM
- - bkellysky   Jupiter with brighter Venus below it. I took this...   Nov 30 2008, 12:11 AM
- - bkellysky   Photos of the conjunction of the Moon, Venus and J...   Dec 2 2008, 02:01 PM
- - bkellysky   A second photo from last night's conjunction -...   Dec 2 2008, 02:04 PM
- - PhilCo126   For those UMSF members/lurkers still observing the...   Dec 17 2008, 04:43 PM
- - bkellysky   My most recent photo of the sky with Venus is from...   Jan 16 2009, 10:04 PM
|- - AndyG   QUOTE (bkellysky @ Jan 16 2009, 10:04 PM)...   Jan 17 2009, 01:25 PM
|- - ugordan   Jupiter's reflection (if any) would be vertica...   Jan 17 2009, 03:06 PM
- - bkellysky   Good points! It must just be a camera artifac...   Jan 17 2009, 03:54 PM
- - bkellysky   If people don't mind my using this thread to s...   Apr 18 2009, 12:38 PM
- - bkellysky   Some parts of the United States got to see Venus e...   Apr 24 2009, 11:31 AM
- - bkellysky   Here's a shot of Venus through my 8-inch Dobso...   Apr 24 2009, 11:44 AM
- - bkellysky   Venus is now a brilliant object in the western sky...   Jun 16 2010, 12:42 AM
- - bkellysky   Last night, I was taking pictures of Venus, et al....   Jun 16 2010, 11:47 AM
- - bkellysky   Venus, through my 8-inch dobsonian telescope, in t...   Jul 6 2010, 01:17 AM
- - ElkGroveDan   Wow. Thanks. I do believe that's one of the ...   Jul 6 2010, 02:36 AM
- - nprev   Agreed. I've always heard that Venus was often...   Jul 6 2010, 02:41 AM
- - Hungry4info   I watched the most recent occultation of Venus by ...   Jul 6 2010, 04:05 AM
- - bkellysky   Crescent Venus with a Canon XS and my 8-inch dobso...   Nov 4 2010, 01:52 AM
|- - AndyG   Nice one, Bob - though I was a bit before readin...   Nov 4 2010, 09:46 AM
- - bkellysky   Venus was impossible to miss, low in the southeast...   Nov 10 2010, 03:45 AM
- - bkellysky   Anytime up to an hour before sunrise, Venus is bri...   Nov 11 2010, 02:13 PM
- - bkellysky   This morning's photo of a skyscape including V...   Nov 12 2010, 12:19 PM


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