Celestial hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  M 100  ·  NGC 4321  ·  NGC 4323  ·  NGC 4328
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M100, Roberto Marinoni
M100
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M100, Roberto Marinoni
M100
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Description

M100 is a spiral galaxy in Coma Berenices constellation: its apparent dimension is 7.4’x6.3’ and magnitude 10.1.
Its estimated distance of 55 million light years was determined in 1993 through the Hubble Space Telescope.
M100 has two big arms which show dust structures for all their lenght: seven supernovae stars were observed in this galaxy from the years 1901 to 2020.

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