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Top Document: [sci.astro] Stars (Astronomy Frequently Asked Questions) (7/9) Previous Document: G.07 What will happen on Earth if a nearby star explodes? Next Document: Do other stars have planets? See reader questions & answers on this topic! - Help others by sharing your knowledge
Official names for celestial objects are assigned by the International
Astronomical Union. Procedures vary depending on the type of object.
Often there is a system for assigning temporary designations as soon as
possible after an object is discovered and later on a permanent name.
See E.05 of this FAQ.
Some commercial companies purport to allow you to name a star.
Typically they send you a nice certificate and a piece of a star atlas
showing "your" star. The following statement on star naming was
approved by the IPS Council June 30, 1988.
The International Planetarium Society's Guidelines on Star Naming
SELLING STAR NAMES
The star names recognized and used by scientists are those that have
been published by astronomers at credible scientific institutions. The
International Astronomical Union, the worldwide federation of
astronomical societies, accepts and uses _only_ those names. Such names
are never sold.
Private groups in business to make money may claim to "name a star for
you or a loved one, providing the perfect gift for many occasions." One
organization offers to register that name in a Geneva, Switzerland,
vault and to place that name in their beautiful copyrighted catalog.
However official-sounding this procedure may seem, the name and the
catalog are not recognized or used by any scientific institution.
Further, the official-looking star charts that commonly accompany a
"purchased star name" are the Becvar charts excerpted from the _Atlas
Coeli 1950.0_. [Other star atlases such as _Atlas Borealis_ may be used
instead.] While these are legitimate charts, published by Sky
Publishing Corporation, they have been modified by the private "star
name" business unofficially. Unfortunately, there are instances of news
media describing the purchase of a star name, apparently not realizing
that they are promoting a money-making business only and not science.
Advertisements and media promotion both seem to increase during holiday
periods.
Planetariums and museums occasionally "sell" stars as a way to raise
funds for their non-profit institutions. Normally these institutions
are extremely careful to explain that they are not officially naming
stars and that the "naming" done for a donation is for amusement only.
OFFICIAL STAR-NAMING PROCEDURES
Bright stars from first to third magnitude have proper names that have
been in use for hundreds of years. Most of these names are Arabic.
Examples are Betelgeuse, the bright orange star in the constellation
Orion, and Dubhe, the second-magnitude star at the edge of the Big
Dipper's cup (Ursa Major). A few proper star names are not Arabic. One
is Polaris, the second-magnitude star at the end of the handle of the
Little Dipper (Ursa Minor). Polaris also carries the popular name, the
North Star.
A second system for naming bright stars was introduced in 1603 by
J. Bayer of Bavaria. In his constellation atlas, Bayer assigned
successive letters of the Greek alphabet to the brighter stars of each
constellation. Each Bayer designation is the Greek letter with the
genitive form of the constellation name. Thus Polaris is Alpha Ursae
Minoris. Occasionally Bayer switched brightness order for serial order
in assigning Greek letters. An example of this is Dubhe as Alpha Ursae
Majoris, with each star along the Big Dipper from the cup to handle
having the next Greek letter.
Faint stars are designated in different ways in catalogs prepared and
used by astronomers. One is the _Bonner Durchmusterung_, compiled at
Bonn Observatory starting in 1837. A third of a million stars to a
faintness of ninth magnitude are listed by "BD numbers." The
_Smithsonian Astrophysical Observatory (SAO) Catalog_, _The Yale Star
Catalog_, and _The Henry Draper Catalog_ published by Harvard College
Observatory all are widely used by astronomers. The Supernova of 1987
(Supernova 1987A), one of the major astronomical events of this century,
was identified with the star named SK -69 202 in the very specialized
catalog, the _Deep Objective Prism Survey of the Large Magellanic
Cloud_, published by the Warner and Swasey Observatory.
These procedures and catalogs accepted by the International Astronomical
Union are the only means by which stars receive long-lasting names. Be
aware that no one can buy immortality for anyone in the form of a star
name.
User Contributions:Comment about this article, ask questions, or add new information about this topic:Top Document: [sci.astro] Stars (Astronomy Frequently Asked Questions) (7/9) Previous Document: G.07 What will happen on Earth if a nearby star explodes? Next Document: Do other stars have planets? 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: 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