Andromeda Galaxy

Andromeda Galaxy title=
Andromeda Galaxy
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By Stargazer Ron

The Andromeda Galaxy (Messier 31) is now overhead in Santa Barbara's night sky. Edwin Hubble deduced that it is 2.5 million light years away and single-handedly reset the size of the universe. If the sun were a grain of sand, then traveling to M31 would be like going from Earth to the Sun 10 trillion times. We now know that our Milky Way looks somewhat similar, having a central core of old cool yellow stars with young hot blue stars being formed on the outer perimeter. Our recent clear October nights made it possible to make this photo from my backyard using a 500mm lens for nearly an hour. Two of Andromeda's satellite galaxies are visible here: Messier 110 (above) and Messier 32 (below).

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NostraChumash Oct 31, 2021 12:13 PM
Andromeda Galaxy

I love space..
When I think, that there are more galaxies simply within the photo..
than there are grains of sand on Earth,
I am..agoged..fantasmerized, mystificated.

notme Oct 31, 2021 06:22 PM
Andromeda Galaxy

Beautiful! Too bad it's been cloudy these past few nights.

macpuzl Oct 31, 2021 08:31 PM
Andromeda Galaxy

Nice shot!

Hubble initially got an answer of a couple of hundred thousand light years away, because he didn't realize there was foreground dust and gas from our own galaxy that caused the Cepheid variable stars he was using as a distance determinant to appear dimmer. Subsequent refinements upped the distance to a million, and finally 2.5 million light years. His measurement was still vastly bigger than any contemporary estimates, and established that many of the things then called nebulae were actually other galaxies external to our own. Before his measurement, many astronomers thought that our galaxy was essentially the entire Universe.

Today, 100 years after Hubble, we have cataloged around two trillion galaxies in the observable part of the Universe.

FondofSB Nov 01, 2021 02:27 AM
Andromeda Galaxy

Thanks for those amazing informations !
Always such a joy to read your posts !

a-1635774539 Nov 01, 2021 06:48 AM
Andromeda Galaxy

Beautiful!! Thank you for sharing!

swarfmaster Nov 01, 2021 08:44 AM
Andromeda Galaxy

I have a large photo of the Hubble deep field hanging in my kitchen. Visitors are generally stunned when I tell them that each dot is a galaxy and there are over a thousand in the picture.

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