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English: 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 thebox like structure. This image was taken as part of Advanced Observing Program (AOP) program at Kitt Peak Visitor Center during 2014.
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Source https://noirlab.edu/public/images/noao-n5746bushey/
Author KPNO/NOIRLab/NSF/AURA/Sherry and Steve Bushey/Adam Block

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current13:41, 23 June 2023Thumbnail for version as of 13:41, 23 June 20231,213 × 1,800 (335 KB)C messier (talk | contribs)Uploaded a work by KPNO/NOIRLab/NSF/AURA/Sherry and Steve Bushey/Adam Block from https://noirlab.edu/public/images/noao-n5746bushey/ with UploadWizard

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