Best of AOP - Galaxies

NGC 5746

NGC 5746 is an edge-on spiral galaxy estimated to be about 95 million light years way. Edge-on galaxies like this provide astronomers with an opportunity to measure particular aspects of spiral galaxies. In this case, astronomers can measure the velocity of stars (by analyzing a the spectrum of the galaxy) at different distances along the disk of the galaxy. From this they can determine a rotation curve of the galaxy which may lead to measurements of the galaxyʼs mass or even mysterious things such as "dark matter." Also notice how the central halo of this galaxy has a box-like shape. Astronomers do not understand exactly how this shape evolved - but a leading theory proposes that a barred spiral galaxy viewed from this perspective might give rise to the box like structure.

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Last Updated: 10-Apr-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.

Two iterations of L-R deconvolution (sharpening) algorithm using CCDsharp were applied to the luminance image.

Digital Development (DDP) via Maxim/DL was also used in order to display the very dim and very bright details of

the image simultaneously.

Luminance = 90 minutes binned 1x1

Red = 20 minutes binned 2x2

Green = 20 minutes binned 2x2

Blue = 20 minutes binned 2x2

Minimum credit line: Sherry and Steve Bushey/Adam Block/NOAO/AURA/NSF