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Author
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Topic: How big is our Galaxy.
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 1 of 147 (278638)
01-13-2006 10:20 AM
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One step in determining some minimum age for our universe would be to find out how big our local neighborhood is. Our solar system, the backyard, is only one yard in the neighborhood of our galaxy, so how big is the galaxy? Once we know the size of the neighborhood, the next question is "Where are we in relation to the center of the neighborhood?" Suggested for Bible A&I
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Nah,I can accept that.
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 2 by AdminWounded, posted 01-13-2006 10:45 AM | | AdminWounded has not replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 8 of 147 (278662)
01-13-2006 12:20 PM
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Reply to: Message 7 by Clark
01-13-2006 12:18 PM
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And this is an image we can actually see?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 7 by Clark, posted 01-13-2006 12:18 PM | | Clark has not replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Well, while we cannot see in infrared, we can detect in infrared. How do we determine that the galactic center is 26,000 light years away?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 9 by Wounded King, posted 01-13-2006 12:21 PM | | Wounded King has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 14 of 147 (278685)
01-13-2006 1:29 PM
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Reply to: Message 13 by Matt P
01-13-2006 1:23 PM
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Re: Geometry in part, but also Cepheid variables
Later work with other wavelengths of life confirmed this. I assume you mean light not life. So currently, how accurate would you say the 26,000 light year distance to the Galactic Center and 100,000 Light year diameter figure for the local Galaxy is?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 13 by Matt P, posted 01-13-2006 1:23 PM | | Matt P has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 16 of 147 (278700)
01-13-2006 2:43 PM
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Reply to: Message 15 by Son Goku
01-13-2006 2:37 PM
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Re: Geometry in part, but also Cepheid variables
Okay. So what forms of information have reached us from the Galactic Center that we can definitely detect and measure? Visible light? X-Ray? Infrared? Others?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 15 by Son Goku, posted 01-13-2006 2:37 PM | | Son Goku has replied |
| Replies to this message: | | | Message 18 by Son Goku, posted 01-13-2006 2:48 PM | | jar has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 19 of 147 (278703)
01-13-2006 2:52 PM
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Reply to: Message 18 by Son Goku
01-13-2006 2:48 PM
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So the age of the universe cannot be less that 100,000 years at a minimum?
and all tend to agree that we are ~25,000 light years from the Galactic Center, and that our Galaxy is about 100,000 Light years across?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 18 by Son Goku, posted 01-13-2006 2:48 PM | | Son Goku has not replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 22 of 147 (278736)
01-13-2006 4:22 PM
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Reply to: Message 20 by cavediver
01-13-2006 4:13 PM
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Re: So the age of the universe cannot be less that 100,000 years at a minimum?
So we are beginning have a pretty good idea about the size of our local neighborhood. But is there something analogous to a city that our neighborhood is within?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 20 by cavediver, posted 01-13-2006 4:13 PM | | cavediver has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 24 of 147 (278743)
01-13-2006 4:45 PM
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Reply to: Message 23 by cavediver
01-13-2006 4:40 PM
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Re: So the age of the universe cannot be less that 100,000 years at a minimum?
So can you place some numbers and confidence levels on any of that? I gather from your post that the Local group is ~10,000,000 light years across. How far are we from the furthest edge of our local group? How do we know that?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 23 by cavediver, posted 01-13-2006 4:40 PM | | cavediver has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 27 of 147 (278774)
01-13-2006 6:24 PM
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Reply to: Message 26 by Son Goku
01-13-2006 6:21 PM
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Re: So the age of the universe cannot be less that 100,000 years at a minimum?
SO for those of us that are dumber than a red brick, what does "This wall-then-filament structure" mean?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 26 by Son Goku, posted 01-13-2006 6:21 PM | | Son Goku has not replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 31 of 147 (278801)
01-13-2006 7:43 PM
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Reply to: Message 28 by Son Goku
01-13-2006 7:30 PM
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Alright, we're starting to get to some really big numbers. To help an old man understand this, let me ask a few more questions. So a Wall might contain 10 Million Galaxies and a Filament about 1 Million Galaxies. Is there more than one Wall? More than one Filament?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 28 by Son Goku, posted 01-13-2006 7:30 PM | | Son Goku has replied |
| Replies to this message: | | | Message 32 by Son Goku, posted 01-13-2006 10:08 PM | | jar has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 33 of 147 (278837)
01-13-2006 10:55 PM
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Reply to: Message 32 by Son Goku
01-13-2006 10:08 PM
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Okay, so let me summarize. There are several hundred walls, each wall contains about 10 Million Galaxies. There are several hundred filaments, each filament contains about 1 Million Galaxies. So at a minimum there is no less than 2 Billion Galaxies. Is that correct?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 32 by Son Goku, posted 01-13-2006 10:08 PM | | Son Goku has replied |
| Replies to this message: | | | Message 34 by Son Goku, posted 01-13-2006 11:11 PM | | jar has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 35 of 147 (278842)
01-13-2006 11:13 PM
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Reply to: Message 34 by Son Goku
01-13-2006 11:11 PM
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Okay, so 100 Billion Galaxies. How many stars might that be? This message has been edited by jar, 01-13-2006 10:13 PM
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 34 by Son Goku, posted 01-13-2006 11:11 PM | | Son Goku has replied |
| Replies to this message: | | | Message 36 by Son Goku, posted 01-13-2006 11:19 PM | | jar has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 37 of 147 (278845)
01-13-2006 11:22 PM
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Reply to: Message 36 by Son Goku
01-13-2006 11:19 PM
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Night of the Creationists.
That's a bunch of stars. Let me ask you a question. What would night look like if the Biblical Creationists happen to be right and all those stars are in a sphere that's 6000 light years in radius based on the earth?.
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 36 by Son Goku, posted 01-13-2006 11:19 PM | | Son Goku has replied |
| Replies to this message: | | | Message 38 by Son Goku, posted 01-13-2006 11:30 PM | | jar has replied |
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jar
Member (Idle past 424 days) Posts: 34026 From: Texas!! Joined: 04-20-2004
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Message 39 of 147 (278847)
01-13-2006 11:41 PM
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Reply to: Message 38 by Son Goku
01-13-2006 11:30 PM
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Re: Night of the Creationists.
Okay, so what would be the smallest universe that would still allow life on earth? Is it possible to even make such an estimate?
Aslan is not a Tame Lion
| This message is a reply to: | | | Message 38 by Son Goku, posted 01-13-2006 11:30 PM | | Son Goku has replied |
| Replies to this message: | | | Message 40 by Son Goku, posted 01-13-2006 11:44 PM | | jar has replied |
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