Messier 108

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Messier 108

Postby smerral » Fri Jan 10, 2020 8:04 pm

M108 imaged last night in full moonlight with the C8 and Starlight Xpress SXVR H9-C at f 5.5. Total integration for luminance was 60 mins. For the colour I added data from the altair quadband filter, total 50 mins.

Messier 108 (also known as NGC 3556) is a barred spiral galaxy in the constellation Ursa Major.

This galaxy has an estimated mass of 125 billion times the mass of the Sun and includes about 290 ± 80 globular clusters. Examination of the distribution of neutral hydrogen in this galaxy shows shells of expanding gas extending for several kiloparsecs, known as H1 supershells. These may be driven by bursts of star formation activity, resulting in supernovae explosions. Alternatively they may result from an infall of gas from outside the galaxy or by radio jets.

Observations with the Chandra X-ray Observatory have identified 83 X-ray sources, including a source located at the nucleus. The supermassive black hole at the core has an estimated mass equal to 24 million times the mass of the Sun.


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