APOD: Icelandic Legends and Aurora (2015 Dec 08)

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Expand view Topic review: APOD: Icelandic Legends and Aurora (2015 Dec 08)

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by geckzilla » Thu Dec 10, 2015 12:28 am

Chris Peterson wrote:
geckzilla wrote:I probably would have done it anyway... nothing pushes my buttons more than new users who pop in here just to try to bring someone down.
Makes you wish you could use the puppet warp tool on them, does it?
Maybe, if I could fix their brain with it to fire more calming neurons and less agitating ones.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Chris Peterson » Wed Dec 09, 2015 10:12 pm

geckzilla wrote:I probably would have done it anyway... nothing pushes my buttons more than new users who pop in here just to try to bring someone down.
Makes you wish you could use the puppet warp tool on them, does it?

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by tjerome » Wed Dec 09, 2015 9:20 pm

Thank you, geck! I appreciate the description, and of course, agree with your motivation! :-)
Clear skies,
Ted

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by geckzilla » Wed Dec 09, 2015 8:25 pm

tjerome wrote:
Wow--that's an impressive demonstration. I gather you used some sort of plate solve to superimpose the star names over the photo, but how did you make the second slide match up perfectly and package it into a clickable demo? I'd love to know how to make a comparison like that.
Ted
It is easy if you already know how but could be fairly difficult without some skills built up in a few different areas first. I took the screenshot in Stellarium knowing the location and date using a perspective projection since that most closely matches the single exposure camera shot. Then, with the two images in Photoshop, I use something called a puppet warp on the screenshot and pin matching stars in place. I try to do the most obvious stars/planets that are far apart first and then match up the smaller details. The web page is just some simple css, html, and javascript.

Since I already did most of the work matching the screenshot with the photo a few nights ago for the annotation, I didn't mind putting this together quickly, especially for the sake of destroying the accusations made against the photographer. I probably would have done it anyway... nothing pushes my buttons more than new users who pop in here just to try to bring someone down.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by tjerome » Wed Dec 09, 2015 6:18 pm

geckzilla wrote:
spider72 wrote:Oh really ? Can you see The Plough over the South-East horizon there ?

This picture is a fake without a doubt.
It matches up perfectly. Keep in mind that the photographer used a wide angle lens, which is most apparent given the distortion of Jupiter in the upper right corner. Ursa Major is toward the southwest, but it is nearly over head. Were you standing there, you would have to look almost straight up. Here's an overlay of a Stellarium screenshot and the APOD. Click the image to swap back and forth. There is no evidence the photo is not real or that the photographer set out to deceive. Please apologize.
http://www.geckzilla.com/apod/AuroraIce ... _swap.html

Wow--that's an impressive demonstration. I gather you used some sort of plate solve to superimpose the star names over the photo, but how did you make the second slide match up perfectly and package it into a clickable demo? I'd love to know how to make a comparison like that.
Ted

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by neufer » Wed Dec 09, 2015 2:31 pm

https://en.wikipedia.org/wiki/Aurora_Borealis_%28painting%29 wrote: <<Aurora Borealis is an 1865 painting by Frederic Edwin Church of the aurora borealis and the Arctic expedition of Dr. Isaac Hayes. The painting measures 56 × 84 1/2 in. and is now owned by the Smithsonian American Art Museum. The iconography of the painting suggested personal and nationalistic references. The peak in the painting had been named Mount Church during Hayes's expedition. Aurora Borealis incorporated details of Hayes' ship, drawn from a sketch he brought back upon returning from his expedition. Contrasting with his earlier works The North and The Icebergs (1861), the intact ship highlights Hayes' achievements in navigating this space, as well as the state of the nation in navigating this contentious historical moment. Presenting the ship's safe passage through the eerie experience, Church suggested optimism for the future with a tiny light shining out from the ship's window.>>

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by geckzilla » Wed Dec 09, 2015 1:52 am

Stars over 10,000 light years away still cause reflections on the surface of water. What's to stop an aurora from doing the same? I feel like I have permanently lost a piece of my sanity on this day.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Chris Peterson » Wed Dec 09, 2015 12:15 am

locobonobo wrote:Gosh, that's all very clever guys. But in questioning the photos' veracity shouldn't you also consider that the aurora appears to be directly illuminating the surface of the sea. Is this possible from 10000 feet?
These auroras are far higher than 10,000 feet. More like 100 kilometers or more. We will see them reflected off water as long as the light reaches the ground... which it obviously does, or there would be no picture.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by locobonobo » Tue Dec 08, 2015 11:33 pm

Gosh, that's all very clever guys. But in questioning the photos' veracity shouldn't you also consider that the aurora appears to be directly illuminating the surface of the sea. Is this possible from 10000 feet?

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Ron-Astro Pharmacist » Tue Dec 08, 2015 10:29 pm

Boomer12k wrote:You mean you cannot see aurora at all from that position?????

You mean like THIS aurora picture taken around the same area????

:---[===] *
Beautiful photograph Boomer! Is it real? How did the aurora know it was Christmas?

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Boomer12k » Tue Dec 08, 2015 10:14 pm

You mean you cannot see aurora at all from that position?????

You mean like THIS aurora picture taken around the same area????

:---[===] *
Attachments
VIK5331.jpg

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by geckzilla » Tue Dec 08, 2015 9:58 pm

neufer wrote:
geckzilla wrote:
FYI spider72 will no longer be able to view or respond to the posts in this thread.
What :!: No binding spider72 with the entrails of one of his kids and
placing a serpent to drip venom from above causing him to writhe in pain :?:
(The moderators are really getting soft.)
That is an oddly specific punishment. I'd never force a snake to participate in something like that. ;)

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by heehaw » Tue Dec 08, 2015 8:43 pm

It is clearly a picture of Hell, taken from Mars.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by neufer » Tue Dec 08, 2015 7:42 pm

geckzilla wrote:
FYI spider72 will no longer be able to view or respond to the posts in this thread.
What :!: No binding spider72 with the entrails of one of his kids and
placing a serpent to drip venom from above causing him to writhe in pain :?:
(The moderators are really getting soft.)

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Boomer12k » Tue Dec 08, 2015 7:06 pm

If you have trouble with this timed exposure, thus the slight star trails, the elongation of Jupiter, and the highlighted foreground.....click on Elizabeth's name and email her. Simple.....

:---(===) *

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Boomer12k » Tue Dec 08, 2015 6:59 pm

Explosions from the Sun.....oh, come on.....get real...

Nice image. I am sure the splendor of nature inspired many a lore around a camp fire on a cold winter's night...back to my cuppa hot tea on this totally rainy day in Oregon. Had to cancel my dental appointment, my dentist has flooding at his house... Never build near a river.....


:---(===) *

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Chris Peterson » Tue Dec 08, 2015 6:27 pm

gmPhil wrote:Does anyone know what that rectangular formation in the rock at lower left of the photo is?
It looks like columnar basalt.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by gmPhil » Tue Dec 08, 2015 6:21 pm

Chris v spider72: it's simple enough to resolve - presumably APOD know who the photographer is. So grab him (her), and waterboard them until they confess or die. If they die, we can presume the photo is real. If they confess, we drown them for wasting everyone's time.
Now can someone please answer my question? (Earlier.)
:)

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by geckzilla » Tue Dec 08, 2015 6:12 pm

Just as an FYI spider72 will no longer be able to view or respond to the posts in this thread.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by spider72 » Tue Dec 08, 2015 6:05 pm

Ha, ha, no it is not, just take closer look on the star charts, there is about 90 degree discrepancy.

BTW I wish this picture was true, but is not.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by geckzilla » Tue Dec 08, 2015 5:54 pm

spider72 wrote:Oh really ? Can you see The Plough over the South-East horizon there ?

This picture is a fake without a doubt.
It matches up perfectly. Keep in mind that the photographer used a wide angle lens, which is most apparent given the distortion of Jupiter in the upper right corner. Ursa Major is toward the southwest, but it is nearly over head. Were you standing there, you would have to look almost straight up. Here's an overlay of a Stellarium screenshot and the APOD. Click the image to swap back and forth. There is no evidence the photo is not real or that the photographer set out to deceive. Please apologize.
http://www.geckzilla.com/apod/AuroraIce ... _swap.html

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Chris Peterson » Tue Dec 08, 2015 5:53 pm

spider72 wrote:Yes I know Chris. I was only making a point proving that there is discrepancy between landscape and sky and that it's not a real picture. Picture like this can never be seen from that location unless we will be hit with large asteroid which will tilt the Earth axis. But I guess there would be nobody to watch it after that event ;).
I would suggest you plan a trip to that location next March. Apparently only your own eyes will convince you that you're wrong.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by spider72 » Tue Dec 08, 2015 5:49 pm

Yes I know Chris. I was only making a point proving that there is discrepancy between landscape and sky and that it's not a real picture. Picture like this can never be seen from that location unless we will be hit with large asteroid which will tilt the Earth axis. But I guess there would be nobody to watch it after that event ;).

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by Chris Peterson » Tue Dec 08, 2015 5:43 pm

spider72 wrote:If you will extrapolate position of the Polaris in the picture, it will be roughly over the left edge of the frame. So to take shot like this, with sea stacks (rocks) more or less in the center of the frame would require lens with field of view over 180 degrees (refer to the shot plan above). Only fisheye lenses can achieve that and this was not shot with fisheye lens because there is no fisheye distortions in the picture, which would be severe taking into account how low the horizon is in the shot. Extreme wide angle lens (say 14mm) on full frame camera has FOV just over 100 degree.
You can measure the FOV from the star field. Horizontally, it's about 90°. That's just what you'd get with an 18mm lens on a full frame sensor. 18mm is not considered fisheye, and it's one of the most common kit lenses that come with DSLRs.

Re: APOD: Icelandic Legends and Aurora (2015 Dec 08)

by spider72 » Tue Dec 08, 2015 5:35 pm

Oh really ? Can you see The Plough over the South-East horizon there ?

This picture is a fake without a doubt.

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