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Photographer:

Jon Greif

Email:

greif.jon@gmail.com

Location of Photo:

Julian, CA, USA

Date/Time of photo:

July 10, 2020, at 1:30 AM PDT

Equipment:

Astrotech AT72ED II refractor, AZ-GTI mount converted to equatorial, ZWO ASI533MC Pro camera, Optolong L-Pro filter, ZWO ASI122 guide camera (OAG), Ekos controlling software and Pixinsight processing software.

Description:

M31, the Andromeda Galaxy, and several of its numerous satellites, photographed early this morning in Julian, CA, is a barred spiral galaxy approximately 2.5 million light-years from Earth, and the nearest major galaxy to the Milky Way. Although about the same size, by mass (1 trillion solar masses), the Andromeda Galaxy contains, at approximately one trillion, twice the number of stars as the Milky Way. The Milky Way and Andromeda galaxies are expected to collide in around 4.5 billion years, merging to form one giant elliptical galaxy. The Andromeda Galaxy is bright enough to be visible to the naked eye from Earth on moonless nights (which last night was not!), even when viewed from areas with moderate light pollution.

Website:

http://www.skyandtelescope.com/author/jgreif/

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