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| Subject:
astronomy
Category: Science > Astronomy Asked by: jessiejames-ga List Price: $10.00 |
Posted:
23 Nov 2004 07:46 PST
Expires: 23 Dec 2004 07:46 PST Question ID: 432877 |
In what ways can the presence of the interstelar medium cause problems for astronomers trying to measure the distancs of farways stars by spectroscopic parallax? |
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| Subject:
Re: astronomy
From: evilsaltine-ga on 23 Nov 2004 08:29 PST |
This might help: http://www-astro.physics.uiowa.edu/~ri/modern_sum02/lect11/lect11.html under the section titled "Extinction and Reddening" Apparently, both those phenomena (gas and dust in the interstellar medium) distort the appearance of stars, throwing off distance calculations by spectroscopic parallax. I'm not really knowledgeable about these things, though.. |
| Subject:
Re: astronomy
From: guzzi-ga on 23 Nov 2004 18:08 PST |
You are aware that spectroscopic parallax has now?t to do with parallax? Best |
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