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Spiral Arm Of Milky Way Looms Closer Than Thought
New Scientist ^
| 12-8-2005
| Maggie McGee
Posted on 12/08/2005 3:16:16 PM PST by blam
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To: blam
Whenever I see a picture like this, it makes me wonder whether or not it has been corrected for relativistic effects. Does this picture represent the positions of the arms as presently measurable from earth, or has it been "adjusted" to correct for the time difference between one end and the other. I'm guessing that it has not been adjusted which explains why it doesn't look much like a spiral.
JSL
To: free_at_jsl.com
Check the links in post #3 and #6. Your answer may be there.
62
posted on
12/08/2005 8:44:26 PM PST
by
blam
To: blam
...twice as close ...I assume that this really means "half as distant."
63
posted on
12/08/2005 8:46:27 PM PST
by
Doctor Stochastic
(Vegetabilisch = chaotisch ist der Charakter der Modernen. - Friedrich Schlegel)
To: blam
Yeah, that's about right we live in the suburbs.
To: samadams2000
"Bright, young stars in the region heat methanol"
... at many a trendy nightclub.
65
posted on
12/08/2005 9:15:11 PM PST
by
JasonC
To: blam
Someone help me here. I am familiar with Saggitarius, Perseus, Carina, Crux (the southern cross), but Scutum and Norma? Never heard of any constellation, or subset of one, by those names.
To: blam; 75thOVI; AndrewC; Avoiding_Sulla; BenLurkin; Berosus; CGVet58; chilepepper; ckilmer; ...
The Universe and the Curtis - Shapley Debate: Lecture
by Robert J. Nemiroff and Jerry T. Bonnell
http://staff.imsa.edu/science/astro/astrometry/historical/debate_1920a.html
"...Shapley thought that the Galaxy was so large it was essentially the whole universe. Shapley not only based his opinion on the distribution of globular clusters and the distances to globular clusters, but on the apparently measured rotation velocities of spiral nebulae... Shapley also did not believe that spiral nebulae were galaxies in their own right. At the time of the Great Debate, he thought that spiral nebula were gaseous clouds repelled by the light pressure of our Galaxy and that our Galaxy was moving through these clouds."
67
posted on
12/08/2005 10:47:17 PM PST
by
SunkenCiv
(Down with Dhimmicrats! I last updated my FR profile on Wednesday, November 2, 2005.)
To: RightWhale
Bingo! The Orion arm.
To: sit-rep
I can put you in a nice Ford Galaxy. No spiral arm, but the control arm should have a little life in her.
69
posted on
12/08/2005 11:02:52 PM PST
by
Larry Lucido
(Boycott taglines that don't say Merry Christmas!)
To: Zuben Elgenubi
I didn't realize they still make 'em.They still make Necco Wafers? Gawd, I loved those as a kid!
CA....
70
posted on
12/08/2005 11:06:21 PM PST
by
Chances Are
(Whew! It seems I've once again found that silly grin!)
To: Larry Lucido
...heck.... I'll take it!!
71
posted on
12/09/2005 4:53:50 AM PST
by
sit-rep
(If you acquire, hit it again to verify...)
To: FreeRep; HighlyOpinionated
I was actually offering a readable explanation for folks who may not understand the math or the theory.
72
posted on
12/09/2005 7:01:46 AM PST
by
RadioAstronomer
(Senior member of Darwin Central)
To: RadioAstronomer; FreeRep; HighlyOpinionated
I was actually offering a readable explanation for folks who may not understand the math or the theory. I think most people on this forum are familiar with your wonderful efforts to provide knowledge to those of us less informed on space and the science involved. Unfortunately, some would reply to your generous offer with sarcasm. I love sarcasm but there is a time and a place. A reply to you wasn't it. Keep up the good work. Most of us enjoy your posts.
73
posted on
12/09/2005 10:15:05 AM PST
by
FOG724
(http://gravenimagemusic.com/)
To: saganite
"..it appears we live in the armpit of the galaxy."There's worse places!
74
posted on
12/09/2005 10:30:10 AM PST
by
Designer
(Just a nit-pick'n and chagrin'n)
To: FOG724; RadioAstronomer; FreeRep; HighlyOpinionated; blam
This is a good thread, keep up the good work. I do enjoy your all the posts and was not being sarcastic. A little humor sometimes get the best of me. The Milky Way is a barred spiral galaxy and barred spiral galaxies are relatively common, up to two-thirds of all spiral galaxies contain a bar and over time they transform into a spiral galaxies. Each spiral arm, four major spiral arms in our galaxy, our Sun is in a smaller arm "the Orion Arm." If the arms do collide, it is thought that our sun and other stars will not collide with other Suns, but merge to form larger spur over the course of about a billion. The color of the sky (universe) called "Cosmic Latte" and has been determined to be a Blueish white. Again we enjoy your posts and thanks.
75
posted on
12/09/2005 12:58:48 PM PST
by
FreeRep
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