Recent Submissions: 2012 November

See new, spectacular, or mysterious sky images.
Florian Kainz

Re: Recent Submissions: 2012 November

Post by Florian Kainz » Fri Nov 09, 2012 9:07 am

The Earth is Round...

Looking out of the window of commercial airliners I've always felt that the horizon was not entirely straight, in other words, that you could see the curvature of the surface of the earth. However, I was never sure if I was just imagining it. On a recent flight I snapped a photo with a wide-angle lens with a horizontal field of view of 90 degrees. Sure enough, the horizon came out curved. (The lens was rectilinear, not a fish-eye).

If you think about it, the curvature of the horizon isn't all that surprising. Looking at the world from an altitude of 11km (36,000 feet) above sea level your horizon is about 375km away, and the distance between two points at the horizon that are 90 degrees apart from your point of view (left and right edge of the photo) is 530km. The direction that is "up" at those two points differs by about 4.8 degrees. A difference of almost five degrees in the direction of the horizon should be clearly visible.


Image
Curvature of the Earth by fksr. Click on the image for a larger version.

I also shot an anaglyph 3D version of this photo, where can also see the surface of the earth curve away from you in the distance:

Image
Curvature of the Earth in 3D by fksr. Click on the image for a larger version.

IanP
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M42 with 60Da

Post by IanP » Fri Nov 09, 2012 11:06 am

Photo taken with Canon 60Da, CPC925 ...
Attachments
M42-2 2012-11-09 CPC925-Canon60Da_Lab1_res9.jpg

atamanti
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Re: Recent Submissions: 2012 November

Post by atamanti » Fri Nov 09, 2012 4:09 pm

Pleiades and surrounding nebulas

Hi-res here:
http://www.tamanti.it/Stars%20Cluster/M45_5D.htm
Thanks for looking, best regards.
Copyright: Andrea Tamanti

tango33
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Re: Recent Submissions: 2012 November

Post by tango33 » Fri Nov 09, 2012 9:16 pm

NGC 6188 in ARA and the Bipolar NGC 6164-5 - Hydrogen Alpha image only.
16" F3.75 Dream scope from Tivoli farm in Namibia.

Kfir Simon

larger version:
http://www.pbase.com/tango33/image/147234594


peregil

Re: Recent Submissions: 2012 November

Post by peregil » Fri Nov 09, 2012 11:24 pm

Another Messier 33 (ngc598)
Ha+LRGB , imaged from Àger Observatories (Catalonia). I hope you like it!
larger version here:
http://observatoriagullo.wordpress.com/ ... 33-ngc598/

lorenzi
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Re: Recent Submissions: 2012 November

Post by lorenzi » Sat Nov 10, 2012 6:52 am

Fornax Cluster
http://www.glitteringlights.com
Copyright: Marco Lorenzi

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goldpaintphoto
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Location: Mount Shasta, CA
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Re: Recent Submissions: 2012 November

Post by goldpaintphoto » Sat Nov 10, 2012 6:56 am

Aurora over Central Oregon
http://goldpaintphotography.com/
Copyright: Brad Goldpaint
Time-lapse video can be found here: http://wp.me/p1FtJT-qL

Marco Angelini
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Re: Recent Submissions: 2012 November

Post by Marco Angelini » Sat Nov 10, 2012 4:14 pm

NGC 457 in Cassiopea: a rich galactic cluster also known as "E.T. Cluster" or "The Owl Cluster"

Authors: F.Antonucci - M.Angelini - F. Tagliani
ADARA Astrobrallo - http://www.astrobrallo.com
Full-Size Image: http://www.astrobrallo.com/gallery/var/ ... 1352562119
Details: http://www.astrobrallo.com/gallery/inde ... ster-finle

ViliMax
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Re: Recent Submissions: 2012 November

Post by ViliMax » Sun Nov 11, 2012 8:54 am

M103 (NGC 581), Open Cluster in Cassiopeia

http://www.elateobservatory.com

Copyright: Velimir Popov
Large scale and more information is avaliable here ...

Thank you for looking ...

SkyViking
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Re: Recent Submissions: 2012 November

Post by SkyViking » Sun Nov 11, 2012 9:33 am

NGC 1365 and Supernova SN2012fr
http://www.rolfolsenastrophotography.com
Copyright: Rolf Wahl Olsen Link to full resolution image (1.7MB)

This image shows the large elegant barred spiral galaxy NGC 1365, located in the southern constellation of Fornax at a distance of 56 million light years. The bright and intensely blue star directly below the galaxy core is supernova SN2012fr, which was discovered by Alain Klotz (TAROT La Silla telescope) on 27th October 2012.
As of 10th November 2012 the supernova appeared to be nearing its peak, with an R magnitude of 11.90. To get an idea of how bright this event is we can calculate the absolute magnitude M of the supernova using the following formula where m is the apparent magnitude and D the distance in parsecs: M = m - 5(log10(D) - 1)
This gives an absolute magnitude of -19.27 for SN2012fr. This means that if the supernova had occurred at a distance to us similar to Betelgeuse (643 light years), then its apparent magnitude would be -12.80, same as the full Moon! :shock: 8-)

Image details:
Date: 7th and 9th November 2012
Exposure: LRGB: 205:57:56:51m, total 6hrs 9mins @ -30C
Telescope: 10" Serrurier Truss Newtonian f/5
Camera: QSI 683wsg with Lodestar guider
Filters: Astrodon LRGB E-Series Gen 2

terry.hancock
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Re: Recent Submissions: 2012 November

Post by terry.hancock » Sun Nov 11, 2012 11:37 am

Rosette Nebula in Hubble Palette
Copyright: Terry Hancock
http://www.flickr.com/photos/terryhanco ... hotostream
Using narrow band filters H-Alpha, OIII and SII Processed using the HST (Hubble) Palette with SII assigned to red channel, H-Alpha to green channel and OIII to blue channel. 4x30 min each, total exposure 6 hours
The Heart of The Rosette (crop)

Leonardo
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Re: Recent Submissions: 2012 November

Post by Leonardo » Sun Nov 11, 2012 3:27 pm

NGC 7822 & Cederblad 214
http://www.starkeeper.it/NGC7822.htm
Copyright: Leonardo Orazi

mikiclinic
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Re: Recent Submissions: 2012 November

Post by mikiclinic » Sun Nov 11, 2012 3:57 pm

IC1848 fetal nebula: narrowband image
http://www.miki-hosp.or.jp/BIND/
Copyright: Nobuhiko Miki
Last edited by mikiclinic on Mon Nov 12, 2012 2:54 am, edited 4 times in total.

davidebardini
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Re: Recent Submissions: 2012 November

Post by davidebardini » Sun Nov 11, 2012 9:45 pm

IC342 The Hidden Galaxy in Camelopardalis

Acquisition: Paolo Lazzarini
Processing: Davide Bardini
Newton WFN 350 f/4.3 - Paramount ME - STL11000
Osservatorio astronomico della Val Malenco (SO) Italy
http://www.cieloinvalmalenco.it
IC342-PS-DEF4-320pix.jpg
http://www.astrosky.it
Medium: http://www.astrosky.it/index.php?id=358
Large: http://www.astrosky.it/imagebig.php?big=358

Thanks for viewing!
Davide Bardini - Italy
http://www.astrosky.it
davidebardini at bardiniassociati.it

alfas
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Re: Recent Submissions: 2012 November

Post by alfas » Sun Nov 11, 2012 10:55 pm

Dawn of the Milky Way
http://500px.com/rafaeldefavari
Copyright: Rafael Defavari

Image
Click to view full size image
http://500px.com/photo/17433101

The warm glow actually it is not a rising sun, but the light pollution of a big city nearby: Campinas, Brazil.

Marco Angelini
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Re: Recent Submissions: 2012 November

Post by Marco Angelini » Mon Nov 12, 2012 1:43 am

NGC 884 & NGC 869: The Double Cluster in Perseo (H & Chi Persei)

Authors: F. Antonucci - M. Angelini - F. Tagliani
ADARA Astrobrallo: http://www.astrobrallo.com
Full-Size: http://www.astrobrallo.com/gallery/var/ ... 1352684011

Picture details: http://www.astrobrallo.com/gallery/inde ... o-Finale-1

martinm3
Asternaut
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Found Images: 2012 November

Post by martinm3 » Mon Nov 12, 2012 1:52 am

NGC 3372 (Carinae Nebula)

Copyright: Martin Matias Menrath http://www.astronommmia.blogspot.com.ar/

LightWavesObserver
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Re: Recent Submissions: 2012 November

Post by LightWavesObserver » Mon Nov 12, 2012 8:14 am

Last edited by LightWavesObserver on Mon Nov 12, 2012 9:57 am, edited 1 time in total.

LightWavesObserver
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Re: Recent Submissions: 2012 November

Post by LightWavesObserver » Mon Nov 12, 2012 9:25 am

Cederbald 214 7nm hydrogen alpha
http://www.lightwavesobservatory.com/Li ... n=download
copyright : James Black

LightWavesObserver
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Re: Recent Submissions: 2012 November

Post by LightWavesObserver » Mon Nov 12, 2012 9:32 am

NGC7822 and Cederbald 214 widefield 7nm hydrogen alpha
http://www.lightwavesobservatory.com/Li ... n=download
copyright : James Black

LightWavesObserver
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Re: Recent Submissions: 2012 November

Post by LightWavesObserver » Mon Nov 12, 2012 9:40 am

The Heart and Soul Nebula widefield 7nm hydrogen alpha
http://www.lightwavesobservatory.com/Li ... n=download
copyright : James Black

LightWavesObserver
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Re: Recent Submissions: 2012 November

Post by LightWavesObserver » Mon Nov 12, 2012 9:45 am

The California Nebula 7nm hydrogen alpha
http://www.lightwavesobservatory.com/Li ... n=download
copyright : James Black

LightWavesObserver
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Re: Recent Submissions: 2012 November

Post by LightWavesObserver » Mon Nov 12, 2012 9:48 am

The Elephant Trunk Nebula 7nm hydrogen alpha
http://www.lightwavesobservatory.com/Li ... n=download
copyright : James Black

terry.hancock
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Re: Recent Submissions: 2012 November

Post by terry.hancock » Mon Nov 12, 2012 6:46 pm

Rosette Nebula in CFHT Palette
Copyright: Terry Hancock
http://www.flickr.com/photos/terryhanco ... hotostream

Using narrow band filters H-Alpha, OIII and SII this was processed with the CFHT Palette technique, the channels are assigned with H-Alpha = Red, OIII = Green, SII = Blue. Captured over 2 nights on the 22nd October and 7th November 2012 from my backyard observatory in Fremont.
The Heart Of The Rosette (crop)

alfas
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Re: Recent Submissions: 2012 November

Post by alfas » Mon Nov 12, 2012 10:11 pm


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