Spiral galaxy in the constellation of Canes Venatici.
Messier 94 (also known as NGC 4736) is a spiral galaxy in the constellation of Canes Venatici with a diameter of about 25,000 light years.
|Date of exposures:||25.03.2019, 30.03.2019|
|Distance:||16,5 Mio. Lightyears|
|Exposures:||Lum: 70 x 180 sec., RGB: 120 x 180 sec., Sum: 9,5 hrs.|
|Telescope:||10'', F4 Newton|
|Filter:||Astrodon LRGB E-Series|
|Camera:||ASI 1600 MMC Pro|
|Guiding:||Off Axis Guider, Lodestar|
It is one of the brightest galaxies in the Canes-Venatici-I group, a galaxy cluster near the Local Group within the Virgo Supercluster.
The galaxy contains two rings, the inner ring being characterized by a very high rate of star formation, which is caused by the emission of gas from the center. M 94 is therefore also classified as a starburst galaxy. It is a galaxy in which star formation is triggered by density waves and takes place simultaneously in different layers. The galaxy has an extremely bright center, while the outer ring is extremely weak.
The rotational speed of the stars around the galaxy center decreases strongly at M 94. This suggests an almost complete absence of dark matter, which causes most other galaxies to rotate faster.