The Whirlpool Galaxy (M51)

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Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

The Whirlpool Galaxy (M51)

Post by Christopher K. »

This double object has separate New General Catalog designations for each component--NGC 5194 for the main spiral galaxy and NGC 5195 for its apparently-attached companion.

More information:
Year-Round Messier Marathon Field Guide by Harvard Pennington, pp. 114-115.
http://www.daviddarling.info/encycloped ... alaxy.html

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: The Whirlpool Galaxy (M51)

Post by Christopher K. »

X-ray data from the NuSTAR mission seem to show a very dense neutron star (only nineteen kilometers across) emit high-energy x-rays. There are also other "green spots" in and very near M51--probably neutron stars as well.

More information:
June 2019 Astronomy, p. 9

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: The Whirlpool Galaxy (M51)

Post by Christopher K. »

The magnitude eight object should be visible with a good sky and a good telescope at about 9:45pm Tuesday night, practically due north and about seventy-two degrees above the horizon.

Jeff Lepp contributed a very nice image of M51 (using a Takahashi FSQ-106EDX IV) to the June 2020 Reflector.

More information:
http://www.messier.seds.org/m/m051.html

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