Best of AOP - Planetary Nebulae

PK 40-0.1

PK 40-0.1 is similar to many planetary nebulae with its spherical shape. Like Abell 39, this sphere of gas was released in a very symmetric way. Note how the edge of the nebula appears brighter. This limb brightening happens because we see more gas towards the edge of the sphere than through its two center thinner layers. PK 40-0.1 is located in the direction of Aquila. In this direction tremendous clouds of gas and dust scatter blue light of what is beyond them. Thus, most things in this field look more red than they would otherwise appear to be.

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Last Updated: 23-Jun-2014

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About This Image

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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.

Luminance = 60 minutes binned 1x1

Red = 15 minutes binned 2x2

Green = 15 minutes binned 2x2

Blue = 15 minutes binned 2x2

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