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Top Document: [sci.astro,sci.astro.seti] Resources (Frequently Asked Previous Document: A.01 What are the sci.astro* newsgroups about? Next Document: A.03 What are the guidelines for posting on astronomy (sci.astro*) newsgroups? See reader questions & answers on this topic! - Help others by sharing your knowledge
Author: Philippe Brieu <philippeumich.edu>,
Walter I. Nissen Jr. CDP <dk058@cleveland.freenet.edu>,
Steven Willner <swillner@cfa.harvard.edu>
If you will follow this group for a month or so before posting here, you
will greatly reduce the likelihood that you will participate in making the
newsgroup less productive and friendly and then end up regretting it. If
you are new here, it is likely that any question you have has already been
asked. If so, its answer is probably in one of the FAQ files. Check out
the newsgroups *news.answers*, *sci.answers*, and *news.announce.newusers*,
or ask your local help file or administrator to point you toward the FAQs.
Also, please check an Usenet archive like _Google_,
<URL:http://groups.google.com/>, to see if somebody has posted a comment or
query similar to yours recently. If you become really frustrated, pick on
one of the more helpful posters here and send e-mail (not a post) politely
asking for some help. Conversely, if your question is novel and not in a
FAQ, readers will likely be intensely interested in considering it.
Certain topics repeatedly come up and lead to lengthy, loud-mouthed
discussions that never lead anywhere interesting. Often these topics have
extremely little to do with the science of astronomy. Experience also
shows that when messages are cross-posted to other groups, followups very
seldom are appropriate in *sci.astro*. It would also help if you would ask
yourself a few simple questions before posting:
If you do ask a question, please consider writing up the answer for a FAQ
file. New entries to the FAQ are always welcome!
There are also a number of common rules for all newsgroups. The following
types of posts are NOT acceptable (see the newsgroup
*news.announce.newusers* and its FAQs at _rtfm.mit.edu_,
<URL:ftp://rtfm.mit.edu/pub/usenet/news.announce.newusers/>, for more
details):
* advertising (other than announcement of availability of products of
direct use to people interested in astronomy without any kind of hype);
* late breaking news (e.g., "CNN just announced that..."), although
questions about recent announcements are acceptable;
* questions answered in the FAQ: always check the appropriate FAQ before
asking a question;
* answers to questions covered by these or other FAQs or posts saying that
the answer is in the FAQ. Instead send email to the poster with a pointer
to the relevant FAQ. If you have a better answer to a FAQ, by all means
contact the maintainer!
* personal messages (e.g. "Looking for..."), especially if it is because
you cannot reach your party by e-mail;
* test messages (there are dedicated groups for that);
* corrections to your own posts (if they are minor and likely to be evident
to the reader), especially if it is just a missing signature;
* "me too" messages: if someone posts a request for something you would
like to get and asks for a reply by e-mail, do NOT post an article to say
you want it too (instead send e-mail to the person who posted the request
and ask to have the information forwarded to you by e-mail).
Also, please try to follow the following USENET guidelines when posting:
* keep your text under 72 columns wide and make sure lines have a newline
character at the end; do not insert any control character; do not use all
upper or all lower cases (mix them);
* post the same message only ONCE (it may not appear immediately on your
news server, but that does not mean that the rest of the world has not
received it yet)---only if your news software tells you it could not post
the article should you try to post it again (but make sure you cancel
previous posts);
* unless you have something to say that is of interest to all/most readers,
reply to the poster by e-mail instead of following up on the group (think
carefully about this);
* keep in mind that private e-mail is copyrighted by law, and that you may
not post it (in whole or in part) without the author's permission;
* before following up, check all other articles in the group for potential
followups that might make what you were going to say useless to say;
* when following up, check the headers (especially newsgroups) and edit
appropriately (especially the subject line if you are changing topics);
* do not quote the entire post you are following up (trim to the minimum
amount of text needed to make your message understood, and eliminate
signatures and useless headers);
* avoid posting the same message to more than one group; crosspost ONLY if
the subject is CLEARLY of EQUAL interest to several groups (check the FAQs
and charters for all groups in the hierarchy to decide where to post);
* never "spam."
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.01 What are the sci.astro* newsgroups about? Next Document: A.03 What are the guidelines for posting on astronomy (sci.astro*) newsgroups? 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