M64 - BLACK EYE GALAXY

The Black Eye Galaxy (M64, NGC 4826) is a spiral galaxy famous for the dramatic dark band of dust that lies in front of its bright central region, giving it the appearance of a bruised or black eye. Located approximately 17 million light-years from Earth in the constellation Coma Berenices, M64 was discovered by Edward Pigott in March 1779, with independent discoveries by Johann Elert Bode and Charles Messier following shortly after. The galaxy is one of the most visually distinctive in the Messier catalog, and the dark dust feature is visible even in modest amateur telescopes. M64 possesses a remarkable and unusual internal structure: the gas in the outer regions of the galaxy rotates in the opposite direction from the gas and stars in the inner regions. The boundary between these two counter-rotating systems is an active zone of star formation, where the colliding gas clouds are compressed and collapse to form new stars. This counter-rotation is believed to be the result of M64 absorbing a smaller companion galaxy more than a billion years ago, with the outer gas disk representing the remnant of the absorbed satellite's material that settled into a retrograde orbit. M64 has a visual magnitude of about 8.5 and spans approximately 54,000 light-years in diameter. In small telescopes of 4 inches, the bright core and overall oval shape are easily visible, but the signature dark dust lane requires at least a 6-inch telescope and good seeing to detect. Larger instruments reveal the full extent of the dark feature and hints of the surrounding spiral structure.

M64 spans approximately 54,000 light-years in diameter with a visual magnitude of 8.5, located about 17 million light-years from Earth.