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IC 434 is a bright emission nebula in the constellation Orion. The Horsehead Nebula (also known as Barnard 33) is a dark nebula silhouetted against the bright IC 434 nebula.

The red glow originates from Hydrogen gas predominantly behind the nebula, ionized by the nearby bright star Sigma Orionis. Magnetic fields channel the gas leaving the nebula into streams, shown as streaks in the background glow. A glowing strip of hydrogen gas marks the edge of the massive cloud.

The nebula is located close to the star Alnitak (on Orion's Belt), and is part of the much larger Orion Molecular Cloud Complex.

The Horsehead Nebula is approximately 1,500 light-years from Earth, and appears dark due to the thick dust and gas blocking the light of stars behind it. Through spectral analysis we know that this stellar nursery contains organic and inorganic dust and gas (including complex organic molecules).

The bright blue stars are still surrounded by the nebulosity (dust and gas clouds) that formed them, as they are 'young' hot stars. You will notice that star colors differ from red, orange and yellow, to blue. This is an indication of the temperature of the star's Nuclear Fusion process. This is determined by the size and mass of the star, and the stage of its life cycle. In short, the blue stars are hotter, and the red ones are cooler.

The nebula in the bottom left corner of this image is called the Flame Nebula (NGC 2024).

Gear:

GSO 6" f/4 Imaging Newtonian Reflector Telescope.

Baader Mark-III MPCC Coma Corrector.

Astronomik CLS Light Pollution Filter.

Celestron SkySync GPS Accessory.

Orion Mini 50mm Guide Scope.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

Canon 60Da DSLR.

Tech:

Guiding in Open PHD 2.6.2.

Image acquisition in Sequence Generator Pro.

Lights/Subs: 24 x 180 sec. ISO 6400 CFA FIT Files.

Calibration Frames:

50 x Bias (at each ISO)

33 x Darks (at each ISO)

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

nova.astrometry.net/user_images/1271047#annotated

RA, Dec center: 85.1914780501, -2.34574423076 degrees

Orientation: 1.25915005321 deg E of N

Pixel scale: 5.89388677374 arcsec/pixel

View in the World Wide Telescope.

Photo usage and Copyright:

Medium-resolution photograph licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Terms (CC BY-NC-ND 4.0). For High-resolution Royalty Free (RF) licensing, contact me via my site: Contact.

Martin

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solleone by sergio barbieri

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Orion Belt & Sword Mosaic (Jan 2016) by Alan Dyer

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A mosaic of the Belt and Sword region of Orion the Hunter, revealing the diverse and colourful array of nebulas in the area, all a part of a vast star-formation complex. The Orion Nebula itself, Messier 42, is below centre, overexposed here. But also visible are the large red Barnardâs Loop, at left, and the blue Witchhead Nebula, IC 2118, at right, illuminated by the bright star Rigel. The Horsehead Nebula is visible below the left start of the Belt of Orion. Above it is the pinkish Flame Nebula, NGC 2024, and above it the bluish M78 reflection nebula complex.

This is a 4-panel mosaic shot Jan 1, 2016 from home on a very clear night, though with some sky gradients. Each panel is a stack of 5 x 3-minute exposures at f/2.8 with the Canon L-Series 135mm lens, on the filter-modified Canon 5D MkII at ISO 1000. The camera was tracking but unguided on the AP Mach One mount. Orion was on the meridian but even so there was a lot of difference in sky brightness between panel segments. Also, trails from geostationary satellites appeared in each frame, as Orion was then near the opposition point, due south at midnight. I eliminated these with a Median combine stack mode for each panel segment. Plus from my latitude southern Orion tends to sit in brighter sky gradients, so the lower panels were brighter and more sky fogged than the upper panels.

All stacking and stitching in Photoshop CC 2015.

Yeh Hai Mohabbatein 8th January 2016 Episode 665 by Yeh Hai Mohabbatein

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Video watch online Yeh Hai Mohabbatein 8th January 2016 today latest new full Episode 665 of Star Plus drama serial Yeh Hai Mohabbatein complete show Episodes by starplus.

Watch Yeh Hai Mohabbatein Episode 665 Online.

Video Source: Dailymotion

Telecast Date: 8 January 2016

YHM is an Indian Soap Opera Hindi Drama Serial. All videos, live news, written updates and episodes are available on YehHaiMohabbatein.Net

Yeh Hai Mohabbatein 8th January 2016 Written Update

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