Best of AOP - Diffuse Nebulae

SH2-136

This image was featured as an APOD back in 2006. Below is the copied caption:

"The dark nebula SH2-136 appears to be celebrating Halloween all of the time. The complex process of star formation create dust clouds of many shapes and sizes -- it is human perception that might identify a ghoulish creature, on the right of the above image, chasing humans. Halloween's modern celebration retains historic roots in dressing to scare away the spirits of the dead. Since the fifth century BC, Halloween has been celebrated as a cross-quarter day, a day halfway between an equinox (equal day / equal night) and a solstice (minimum day / maximum night in the northern hemisphere). With our modern calendar, however, the real cross-quarter day will occur next week. Other cross-quarter markers include Groundhog Day and Walpurgis Night" (APOD, 10/31/2006).

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Last Updated: 13-Jun-2014

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About This Image

Click on image for larger version.

Equipment

20in RC Optical Systems telescope Operating at f/8.1

Paramount ME Robotic Telescope Mount

SBIG ST10XME CCD camera with color filter wheel

LRGB color production was used to create this image.

This is a two frame mosaic. The exposure times above refer to each of the frames. Thus, the total time spent on

just exposing is nearly 8 hours.

Luminance = 170 minutes (each frame) binned 1x1

Red = 40 minutes binned 2x2

Green = 40 minutes binned 2x2

Blue = 40 minutes binned 2x2

Minimum credit line: Adam Block/NOAO/AURA/NSF