Tuesday, October 2, 2012
An experimental animation of IC 1340
In this experimental animation the nebula, IC 1340, can be seen with and without stars.
Sometimes it's easier to see complex shapes of nebula without stars, specially if it locates in a very dense star field. Human brains has an ability to create some quasi-logical shapes out of the random cloud of dots, like stars, and it can interferes the underlying shapes to be seen clearly.
Original image and imaging data can be seen in this blog post:
http://www.astroanarchy.blogspot.fi/2012/09/ic-1340-project-as-bi-color-from.html
Sunday, September 30, 2012
An electric Nike, IC 1340 in Eastern Veil Nebula
IC 1340, an electric Nike of Samothrace
This is a second version of this photograph. It looks like an electric version of the Nike statue!
Statue of the Nike
http://en.wikipedia.org/wiki/Winged_Victory_of_Samothrace
IC 1340
http://www.astroanarchy.blogspot.fi/2012/09/ic-1340-project-as-bi-color-from.html
Saturday, September 29, 2012
Two panel mosaic from the Butterfly to Crescent Nebula
Butterfly and Crescent Nebulae in constellation Cygnus
Image is in mapped colors, from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
The colorful "noise" at background is not a noise but countless number of stars!
This is a part of the much large, 18-panels, mosaic of constellation Cygnus, it can be seen HERE.
Image is shot at Autumn 2011, I'm publishing this here, since I have reprocessed the color data.
Image is shot with Canon EF 200mm f1.8 optics, full open, QHY9 cooled astronomical camera and the Baader narrowband filter set. (H-a. O-III and S-II) Esposure times, about two hours per channel, total six hours.
Shooting with f1.8 optics is kind of extreme, the critical focus zone is only 7 microns (7/1000mm).
Focusing and staying in focus is really difficult at that speed, one quarter of the degrees temperature drop is enough to destroy focus. I have build a temperature compensating automatic focusing system for camera lenses. ( http://astroanarchy.blogspot.fi/2008/09/new-equipmets-and-some-development-work.html )
A closeup image of the Crescent Nebula,
it can be seen at center of the image above
Image is in HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.
This image was selected as an APOD, Astronomy Image Of the Day, by the NASA.
Thursday, September 27, 2012
A scale study of the Veil Nebula supernova remnant
Many times, it's difficult to understand the image scale of astronomical images.
Therefore I have added a "Moon circle" in the images to show the angular scale in the sky. The full Moon has an angular size of ~30 arc minutes, that's equal to ~0,5 degrees.
A new scale study, the Veil Nebula
Note. The apparent size of the Moon is marked as a white circle for a scale.
Images used in this series:
Two images at top are shot with the Canon EF 200mm f1.8 camera lens and QHY9 astronomical camera with the narrowband filters:
Images at middle are shot with SkyWatcher 80 ED telescope at ~700mm focal length:
http://astroanarchy.blogspot.fi/2010/04/eastern-part-of-veil-nebula-as-stereo.html
Image at bottom is shot with Meade LX200 GPS 12" telescope at ~f5:
http://www.astroanarchy.blogspot.fi/2012/09/ic-1340-project-as-bi-color-from.html
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