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Top Document: [sci.astro,sci.astro.seti] Resources (Frequently Asked Previous Document: A.09 Is there a list of astro jokes? Of course! Astronomy is not an entirely sirius subject. Rather than try Next Document: A.11 Are there other sources of information? See reader questions & answers on this topic! - Help others by sharing your knowledge
Joseph Lazio <jlazio@patriot.net>
In general, do not underestimate your local library. It likely contains
encyclopediae and other reference sources to answer many questions.
Pictures and/or other astronomical information
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The Armagh Planetarium
College Hill
Armagh BT61 9DB, Northern Ireland, U.K.
Fax: +44 (0)861 52 6187
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Astronomical Society of the Pacific
390 Ashton Avenue
San Francisco, CA 94112, USA
e-mail: asp@stars.sfsu.edu (customer correspondence)
Phone: +1 (415) 337 2624, Toll free (U.S. only): 800 335 2624
Fax: +1 (415) 337 5205
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The Hansen Planetarium
1845 South 300 West,#A
Salt Lake City, Utah 84115, USA
Phone: +1 (801) 483 5400, Toll free (USA only): 800 321 2369
Fax: +1 (801) 483 5484
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Holiday Film Corporation
P.O.Box 619
12607 E. Philadelphia St.
Whittier, CA 90608, USA
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List of Great Observatories making Astronomical Photographs publicly
available
Hartmut Frommert
University of Constance
Dept. of Physics
P.O.Box 5560 M 678
D-78464 Konstanz, Germany
Phone: +49 7531-88-3789
E-Mail: spider@seds.org
_http://www.seds.org/%7Espider/obs-ims.txt_, <URL:http://www.seds.org/%7Espider/obs-ims.txt>,_anonymous ftp list_, <URL:ftp://www.seds.org/pub/info/obs-ims.txt>,
User Contributions:Comment about this article, ask questions, or add new information about this topic:Top Document: [sci.astro,sci.astro.seti] Resources (Frequently Asked Previous Document: A.09 Is there a list of astro jokes? Of course! Astronomy is not an entirely sirius subject. Rather than try Next Document: A.11 Are there other sources of information? Part0 - Part1 - Part2 - Part3 - Part4 - Part5 - Part6 - Part7 - Part8 - Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: T. Joseph W. Lazio <jlazio@patriot.net>
Last Update March 27 2014 @ 02:11 PM
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with stars, then every direction you looked would eventually end on
the surface of a star, and the whole sky would be as bright as the
surface of the Sun.
Why would anyone assume this? Certainly, we have directions where we look that are dark because something that does not emit light (is not a star) is between us and the light. A close example is in our own solar system. When we look at the Sun (a star) during a solar eclipse the Moon blocks the light. When we look at the inner planets of our solar system (Mercury and Venus) as they pass between us and the Sun, do we not get the same effect, i.e. in the direction of the planet we see no light from the Sun? Those planets simply look like dark spots on the Sun.
Olbers' paradox seems to assume that only stars exist in the universe, but what about the planets? Aren't there more planets than stars, thus more obstructions to light than sources of light?
What may be more interesting is why can we see certain stars seemingly continuously. Are there no planets or other obstructions between them and us? Or is the twinkle in stars just caused by the movement of obstructions across the path of light between the stars and us? I was always told the twinkle defines a star while the steady light reflected by our planets defines a planet. Is that because the planets of our solar system don't have the obstructions between Earth and them to cause a twinkle effect?
9-14-2024 KP