Messier 81 & Messier 82

M 81 & M 82

MouseOver for object identification, Click on image for a zoomable version

More stretched version with "Galaktic Cirrus" or "Integrated Flux Nebula" (IFN):

M 81 und M 82 und Cirrus

Location / Date

Zellerndorf, 17., 18. und 22. March 2012

Telescope / Mount / Guiding

10" f4,7 Newtonian, NEQ6, Lacerta Mgen + OAG, Baader MPCC

Camera / Exposure

Canon EOS 500Da
42 x 15min ISO 200
23 x 20min ISO 200 with Astronomik CLS-Filter (18h 10min)


Theli, Fitswork, Pixinsight, Photoshop


Messier 81 (also known as Bode's Galaxy) is a spiral galaxy about 12 million light-years away in the constellation Ursa Major.

Messier 82 (also known as Cigar Galaxy) is the prototype nearby starburst galaxy about 12 million light-years away. The starburst galaxy is five times brighter than the whole Milky Way and one hundred times brighter than our galaxy's center.

M82 is being physically affected by its larger neighbor M 81. Tidal forces caused by gravity have deformed this galaxy, a process that started about 100 million years ago. This interaction has caused star formation to increase tenfold compared to "normal" galaxies.

Holmberg IX is a dwarf irregular galaxy and a satellite galaxy of M81.

"Galaktic Cirrus" or "Integrated Flux Nebula" (IFN) is a complex of diffuse gas and dust clouds in our Milky Way Galaxy.

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