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The galaxy at the right is NGC 4874, while the star above it is HD 112887 which is a foreground star and is completely unrelated to the cluster. NGC 4889 was not included by the astronomer Charles Messier in his famous Messier catalogue despite being an intrinsically bright object quite close to some Messier objects.
A dark galaxy is a hypothesized galaxy with no (or very few) stars. They received their name because they have no visible stars but may be detectable if they contain significant amounts of gas. They received their name because they have no visible stars but may be detectable if they contain significant amounts of gas.
The central supermassive black hole is calculated to have a mass of about 8.4 × 10 6 M ☉. [9] The interstellar medium of Messier 64 consists of two counter-rotating disks that are approximately equal in mass. [19] The inner disk contains the prominent dust lanes of the galaxy. The stellar population of the galaxy exhibits no measurable ...
The star formation rate in NGC 2835 is 1.3 M ☉ per year and the total stellar mass of the galaxy is 10 10 M ☉. [7] In the centre of NGC 2835 lies a supermassive black hole whose mass is estimated to be 3-10 million (10 6.72±0.3) M ☉, based on the spiral arm pitch angle. [8] NGC 2835 is the foremost galaxy in a small group of galaxies ...
A computer screen showing a background wallpaper photo of the Palace of Versailles A wallpaper from fractal. A wallpaper or background (also known as a desktop background, desktop picture or desktop image on computers) is a digital image (photo, drawing etc.) used as a decorative background of a graphical user interface on the screen of a computer, smartphone or other electronic device.
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OJ 287 is a BL Lac object 4 billion light-years from Earth that has produced quasi-periodic optical outbursts going back approximately 120 years, as first apparent on photographic plates from 1891.
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