Comments and questions about the
APOD on the main view screen.
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APOD Robot
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by APOD Robot » Thu Oct 24, 2013 4:05 am
Little Planet Shadowrise
Explanation: Warm shades and subtle colors come to the sky in the fading sunlight after
shadowrise on this little planet. Of course the
little planet is planet Earth, and this
nadir-to-zenith,
around-the-horizon mosaic maps the view from a small airfield near the town of Intendente Alvear, La Pampa province, Argentina. Just above the western horizon (top) the sky shines with the warm
colors of sunset. The slate blue
shadow of Earth itself extending through the atmosphere can be seen rising as it hugs the eastern horizon (bottom). Wrapped closely above the narrow projection of Earth's shadow is the gentle glow of reddened, backscattered sunlight called the
antitwilight arch or the
Belt of Venus.
[/b]
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Nitpicker
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by Nitpicker » Thu Oct 24, 2013 4:17 am
Clever photography. Stop it! You're giving me ideas!
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petsie
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by petsie » Thu Oct 24, 2013 7:38 am
Oh my! If our planet would look as green as in this image!! IIRC the area covered by forest reduced (here in germany) to ~30 percent compared to ancient times
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Boomer12k
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by Boomer12k » Thu Oct 24, 2013 9:06 am
Awesome way to see Earth's Shadow...did not know you could do that....WOW!!!
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RedFishBlueFish
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by RedFishBlueFish » Thu Oct 24, 2013 10:13 am
It is fitting that this Little Planet projection is of an airfield, for Saint-Exupéry, who wrote and illustrated the haunting novella The Little Prince was an aviation pioneer. The book's cover art shows the Little Prince standing on The Little Planet and is, as far as I know, the origin of the name of this photographic projection.
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Czerno o
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by Czerno o » Thu Oct 24, 2013 10:23 am
RedFishBlueFish wrote: The book's cover art shows the Little Prince standing on The Little Planet and is, as far as I know, the origin of the name of this photographic projection.
Indeed ! It should be noted that the original drawing of the cover as well as those illustrating the text of the Little Prince's story are by Saint-Ex's own hand.
Nice APOD too...
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Czerno
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Ann
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by Ann » Thu Oct 24, 2013 10:31 am
Boomer12k wrote:Awesome way to see Earth's Shadow...did not know you could do that....WOW!!!
:---[===] *
You can indeed see the Earth's shadow! It looks something like
this. The Earth's shadow often looks like a thick bank of clouds. When you see the full Moon shining right through that seemingly opaque layer of blue, it looks amazing.
Ann
Color Commentator
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Beyond
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by Beyond » Thu Oct 24, 2013 11:04 am
To find the Truth, you must go Beyond.
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jambo
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by jambo » Thu Oct 24, 2013 12:19 pm
Is there a geometric shape to the outermost layer of light?
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Chris Peterson
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by Chris Peterson » Thu Oct 24, 2013 12:55 pm
Beyond wrote:So that's what that bluishness is that you see in the east after sunset and in the west before sunrise, IF you get up early enough, which i don't usually do. Shirley someone must have mentioned it here before and i missed it.
???
The Belt of Venus has been featured in dozens of APODs over the years, I and many others have submitted our own images for discussion, and the subject comes up fairly regularly. Not sure how you could have missed it.
And who the heck is Shirley?
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JohnD
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by JohnD » Thu Oct 24, 2013 1:00 pm
If that is the Earth's shadow, then what is seen at 8 o'clock?
At ground level is a church spire or other tall, narrow building, and behind it is what might be the shadow of a massive mountain.
OR, more likely, as the Earth just isn't so lumpy on global scale as to cast that irregular a shadow, a large thunder cloud, much, much closer!
John
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BDanielMayfield
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by BDanielMayfield » Thu Oct 24, 2013 1:05 pm
Nitpicker wrote:Clever photography. Stop it! You're giving me ideas!
Was this image taken with a fisheye camera lens pointed straight down, or was the image created from other more typical images that were then processed into this image?
Just as zero is not equal to infinity, everything coming from nothing is illogical.
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Chris Peterson
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by Chris Peterson » Thu Oct 24, 2013 1:08 pm
jambo wrote:Is there a geometric shape to the outermost layer of light?
The Belt of Venus is an essentially local phenomenon. You are only seeing the shadow generated by a small arc of the Earth's circumference- a few tens of miles, to a few hundred at most. So the structure you see depends very much on your local landscape: the effect as seen in the mountains may look quite a bit different than when seen in a wide open area. It is often modified further if there are any clouds on or just over the sunward horizon. And, it can change shape quite significantly over just a few minutes as the position of the Sun changes.
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BDanielMayfield
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by BDanielMayfield » Thu Oct 24, 2013 1:18 pm
BDanielMayfield wrote:Was this image taken with a fisheye camera lens pointed straight down, or was the image created from other more typical images that were then processed into this image?
Ah, I guess since the description says it was a mosaic the latter would be the case, but I’d still like to learn what kind of lens was used and how it was produced.
Just as zero is not equal to infinity, everything coming from nothing is illogical.
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rstevenson
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by rstevenson » Thu Oct 24, 2013 1:29 pm
BDanielMayfield wrote:BDanielMayfield wrote:Was this image taken with a fisheye camera lens pointed straight down, or was the image created from other more typical images that were then processed into this image?
Ah, I guess since the description says it was a mosaic the latter would be the case, but I’d still like to learn what kind of lens was used and how it was produced.
If the photographer is willing to share instructions, that'd be great. But in the meantime, a search yielded
this page from the PhotographyMad site.
Rob
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Beyond
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by Beyond » Thu Oct 24, 2013 1:49 pm
Chris Peterson wrote:Beyond wrote:So that's what that bluishness is that you see in the east after sunset and in the west before sunrise, IF you get up early enough, which i don't usually do. Shirley someone must have mentioned it here before and i missed it.
???
The Belt of Venus has been featured in dozens of APODs over the years, I and many others have submitted our own images for discussion, and the subject comes up fairly regularly. Not sure how you could have missed it.
And who the heck is Shirley?
I though the belt of Venus was pink and don't ever remember it being referred to as 'earth shadow'. Seems to be a case of knowing something two different ways, but for some reason, it just never clicked that they were the same thing. Life is full of little surprises like that.
Shirley surely you know that famous line "...and don't call me Shirley", that an
infamous
Artist has used in the forums
To find the Truth, you must go Beyond.
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NobodyImportant
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by NobodyImportant » Thu Oct 24, 2013 3:18 pm
This is like the 847th of these distorted "little world" type photos I've seen on APOD...interesting the first 87 times, but getting a bit old by now
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neufer
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by neufer » Thu Oct 24, 2013 3:28 pm
petsie wrote:
Oh my! If our planet would look as green as in this image!!
IIRC the area covered by forest reduced (here in germany) to ~30 percent compared to ancient times
But
some of those ancient forests were black.
Art Neuendorffer
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BMAONE23
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by BMAONE23 » Thu Oct 24, 2013 5:02 pm
neufer wrote:petsie wrote:
Oh my! If our planet would look as green as in this image!!
IIRC the area covered by forest reduced (here in germany) to ~30 percent compared to ancient times
But
some of those ancient forests were black.
This reads as though our world is greening
http://www.worldclimatereport.com/index ... -cause-it/
Note: red areas indicate an increase in plant growth
References
Lo, T.-T. and H.-H. Hsu. 2010. Change in the dominant decadal patterns and the late 1980s abrupt warming in the extratropical Northern Hemisphere. Atmospheric Science Letters, 11, 210–215.
Liu, S., R. Liu, and Y. Liu. 2010. Spatial and temporal variation of global LAI during 1981–2006. Journal of Geographical Sciences, 20, 323-332.
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Beyond
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by Beyond » Thu Oct 24, 2013 5:17 pm
Hmm.. perhaps the changing weather patterns are putting a bit more rain into those places?
That picture, looks like it would spin very good if it were 3D.
To find the Truth, you must go Beyond.
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geckzilla
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by geckzilla » Thu Oct 24, 2013 6:04 pm
BMAONE23 wrote:neufer wrote:petsie wrote:
Oh my! If our planet would look as green as in this image!!
IIRC the area covered by forest reduced (here in germany) to ~30 percent compared to ancient times
But
some of those ancient forests were black.
This reads as though our world is greening
http://www.worldclimatereport.com/index ... -cause-it/
Note: red areas indicate an increase in plant growth
References
Lo, T.-T. and H.-H. Hsu. 2010. Change in the dominant decadal patterns and the late 1980s abrupt warming in the extratropical Northern Hemisphere. Atmospheric Science Letters, 11, 210–215.
Liu, S., R. Liu, and Y. Liu. 2010. Spatial and temporal variation of global LAI during 1981–2006. Journal of Geographical Sciences, 20, 323-332.
If you're going to post a skeptic link, I'm going to post a skeptic skeptic link. You can follow it up with a skeptic skeptic skeptic link and so on until we get tired of this.
http://skepticalscience.com/ridley-murd ... rming.html
Just call me "geck" because "zilla" is like a last name.
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BDanielMayfield
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by BDanielMayfield » Thu Oct 24, 2013 6:17 pm
rstevenson wrote:BDanielMayfield wrote:BDanielMayfield wrote:Was this image taken with a fisheye camera lens pointed straight down, or was the image created from other more typical images that were then processed into this image?
Ah, I guess since the description says it was a mosaic the latter would be the case, but I’d still like to learn what kind of lens was used and how it was produced.
If the photographer is willing to share instructions, that'd be great. But in the meantime, a search yielded
this page from the PhotographyMad site.
Rob
That link was great Rob. It showed that creating these kind of images aren't really that challenging at all. Thanks Rob.
Just as zero is not equal to infinity, everything coming from nothing is illogical.
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Beyond
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by Beyond » Thu Oct 24, 2013 6:20 pm
geckzilla wrote:If you're going to post a skeptic link, I'm going to post a skeptic skeptic link. You can follow it up with a skeptic skeptic skeptic link and so on until we get tired of this.
Owlice will run out of popcorn w-a-y before you guys run out of skeptic links.
To find the Truth, you must go Beyond.
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neufer
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by neufer » Thu Oct 24, 2013 6:24 pm
http://www.huffingtonpost.com/michael-s ... 38896.html
http://www.michaelshermer.com/2009/08/s ... /#more-918
Old
European trees are probably still recovering a from the hit they took from acid rain in the '60's.
http://en.wikipedia.org/wiki/Acid_rain#Forests_and_other_vegetation wrote:
<<Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants, aquatic animals and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids. Governments have made efforts since the 1970s to reduce the release of sulfur dioxide into the atmosphere with positive results.
Adverse effects may be indirectly related to acid rain, like the acid's effects on soil (see above) or high concentration of gaseous precursors to acid rain. High altitude forests are especially vulnerable as they are often surrounded by clouds and fog which are more acidic than rain.
Other plants can also be damaged by acid rain, but the effect on food crops is minimized by the application of lime and fertilizers to replace lost nutrients. In cultivated areas, limestone may also be added to increase the ability of the soil to keep the pH stable, but this tactic is largely unusable in the case of wilderness lands. When calcium is leached from the needles of red spruce, these trees become less cold tolerant and exhibit winter injury and even death.>>
Art Neuendorffer
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geckzilla
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by geckzilla » Thu Oct 24, 2013 6:39 pm
The skeptics and the skeptic skeptics stood both on opposite sides of the Grand Canyon of Emotions, Bias, and Ideology and shouted across that vast expanse but couldn't quite hear each other, especially with all the echoes of previous shouts muddling the sounds of the newer shouts.
Just call me "geck" because "zilla" is like a last name.