Galactic Center of the Milky Way

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  • Member since
    September, 2013
Galactic Center of the Milky Way
Posted by paddlefish on Wednesday, September 18, 2013 9:55 AM

Paddlefish here with a question 'what is the relationship

 of the earth to the Galactic Center of our universe?' Reply via my e-mail Tx.

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Posted by chipdatajeffB on Wednesday, September 18, 2013 4:41 PM

I'm not sure I understand what you're trying to find out. There is no "galactic center of our universe" nor is there a "center" to the universe as a whole (that we know of).

Do you mean, "where is Earth relative to the center of our galaxy?" That we can answer, because we know where the center of the Milky Way is located, in celestial coordinate. That is, I can point it out to you on the night sky, or using a planetarium program on a computer that generates a map of the night sky.

If you are interested in a geometric exercise of some sort, then you'll need to understand the galactic coordinate system.

Tell us what you are trying to figure out and we may be of more help.

Meanwhile, perhaps this visualization will help:

http://www.universetoday.com/65601/where-is-earth-in-the-milky-way/

 

The universe is not only stranger than we imagine, it's stranger than we CAN imagine. --- JBS Haldane

Come visit me at Comanche Springs Astronomy Campus (we're on Google Maps) in Texas.

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Posted by Bullfox on Thursday, October 03, 2013 11:51 PM

Looking at the image of the Milky Way in your link, a question came to mind.    What is farthest object from the Earth known to be in the Milky Way?  I suppose it would be about 125,000 light years from us in the general direction of Sagitarius, and is probably a globular cluster, but other than that I would not know.

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Posted by chipdatajeffB on Friday, October 04, 2013 8:41 AM

It's not exactly "in" the Milky Way (any longer) but the Intergalactic Wanderer, a small star cluster, is associated with the Milky Way even though it's now in intergalactic space and something like 300,000 light years from us. It is catalogued as NGC 2419.

The universe is not only stranger than we imagine, it's stranger than we CAN imagine. --- JBS Haldane

Come visit me at Comanche Springs Astronomy Campus (we're on Google Maps) in Texas.

www.3rf.org

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Posted by Bullfox on Sunday, October 06, 2013 5:38 PM

What would it take to eject an etire star cluster from the Milky Way?

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Posted by chipdatajeffB on Sunday, October 06, 2013 6:04 PM

Close passage by another large body (like a satellite galaxy) if the cluster were in the outer realms (where most of them are), or a gravitational slingshot effect. We don't really know why this one is speeding away, but it is.

The universe is not only stranger than we imagine, it's stranger than we CAN imagine. --- JBS Haldane

Come visit me at Comanche Springs Astronomy Campus (we're on Google Maps) in Texas.

www.3rf.org

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Posted by Bullfox on Sunday, October 06, 2013 9:20 PM

The Wikipedia entry says it may be the core of a dwarf galaxy that was shredded by a close encounter with the Milky Way.  Its mag 9, about 6 arc minutes in diameter.  It would be an interesting object to image.

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Posted by paddlefish on Monday, October 07, 2013 8:46 AM

i have received several post regarding the location of the galactic center of the unvivers each with a different description. To simplify the request-- i am interested in its location releative to EARTH, a fixed point. AND yes I realize EARTH does not remain static and moves; so lets further simplify the question and  place the time as current OCT 2013. what's the answer? Paddlefish

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Posted by Bullfox on Monday, October 07, 2013 10:26 AM

There is no known center of the universe, galactic or otherwise.  The center of our galaxy is in the constellation Sagatarius.

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Posted by DaveMitsky on Monday, October 07, 2013 2:12 PM

As has already been mentioned, the center of our galaxy, the Milky Way, lies in Sagittarius.  The coordinates are right ascension 17h45m40.04s, declination -29°00'28.1".

http://www.astro.ucla.edu/~tanner/gcintro.html

According to standard Big Bang cosmology, there are no favored locations and universe has no center.  

http://www.spitzer.caltech.edu/video-audio/664-ask2009-001-Where-Is-the-Center-of-the-Universe-

http://math.ucr.edu/home/baez/physics/Relativity/GR/centre.html

Dave Mitsky

Sic itur ad astra!

Chance favors the prepared mind.

A man is a small thing, and the night is very large and full of wonders.

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Posted by Bullfox on Tuesday, October 08, 2013 11:51 AM

Dave,

Thanks!  Sagittarius is not in my spell checker.

Bullfox

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