Future Activities.
Vice President John Bell reported that he is still working on a star party
for Ft. Davis schools. Their science teacher has moved to Alpine
and is now teaching at Alpine High School, so John will need to work with
other people in Ft. Davis.
John has spoken with Kathleen
Hoyt, the new director at the Chihuahuan Desert Research Institute.
She was very receptive to the possibility of our holding a meeting or star
party at the CDRI. The pavilion normally rents for $50.00, but that
rental may be negotiable.
Some years ago, we had a very
successful star party at the CDRI. The location is quite dark and
the surroundings very pleasant. Power is available in the pavilion.
And by the way, we weren't charged any rent on that occasion.
Outdoor Lighting.
Jim Walker reported that the lights in the parking lot at the Oak Tree
Inn on east US 90 are full cutoff fixtures, but tilted about 20 deg above
the horizontal. The City is taking steps to see that these lights
are leveled. [Note: At this writing, these lights have indeed been
adjusted to the horizontal.]
The Texas Legislature has passed
HB164, for the benefit of the George Observatory in Brazos Bend State Park,
near Houston. This bill will make it possible for the director of
the observatory to request the regulation of outdoor lighting in counties
any part of which lie within 5 miles of the observatory. As I read
the bill, lights at any distance within such a county can be regulated.
The bill is similar to the legislation enacted many years ago for the benefit
of McDonald Observatory. HB164 is awaiting Governor Perry's signature.
[Note: Since our meeting, the governor signed the bill, which is now law.
Score one for dark skies!]
End of minutes.
Respectfully submitted, Jim
Walker, Secretary
What's in a Name?
or, The Whys and Wherefores of How Things in the Sky
Are Named
by John Bell, reported by Jim Walker
Who decides how to name things
in the heavens? Is anyone - just anybody - free to name anything
in the sky? There are businesses that will name a star after you
for a price, or in honor of anyone you designate. But will the astronomical
community recognize and use such a name? The names of stars and other
astronomical objects are in fact chosen by international astronomi-cal
organizations who are not in the business of selling stars or their names.
Some definitions: astronomy
studies the arrangement of the stars; astrology seeks to explain
the influence of the heavens on human affairs; and astrometry concerns
the measurement of the stars, especially their positions. We find
astro
and aster in a great many of our terms. For example, an asterism
is a meaningful collection of stars, such as the Big Dipper. But
please note that an asterism is not necessarily an official
constellation,
such as Ursa Major. A disaster is a calamity alleged in the
old days to be caused by a bad star. An asterisk is a mark
that often refers you to a footnote warning that an advertised deal isn't
as good as it looks. An asteroid is an object that looks like
a star in a telescope, but isn't, because it can be seen to move like a
planet. A meteoroid is like a meteor but outside the earth's
atmosphere.
By convention, the planets have
been named after Roman gods. In order of distance from the sun, the
planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune,
and Pluto. The first six planets were known to the ancients.
The first planet, with its rapid movement, was named after Mercury, the
speedy messenger of the gods. Venus, shining brightly as the morning
or evening star, is the goddess of love. Mars, the red planet, is
the god of war. Jupiter, the greatest of the planets, was named after
the greatest of the Roman gods. Saturn was named after the
god of the harvest. In 1781, William Herschel made the first discovery
of a planet since the ancients. Herschel wanted to name the planet
Georgium Sidus, George's Star, perhaps to curry favor with the then English
king, George III. Someone else proposed the name Herschelium.
Eventually the planet was named Uranus, for the ruler of the world.
Neptune was named for the god of the sea, and Pluto for the lord of the
underworld - or was it for a mouse's dog?
Asteroids are named by their discoverers,
after people, countries, or anything else. An asteroid discovered
at Mt. Palomar was named San Diego after that near-by city installed low-pressure
sodium lights for the benefit of the observatory. The city later
switched to brighter high-pressure sodium lights. [Late reports from
the dark-sky community indicate that San Diego is considering replacing
their HPS streetlights with unshielded acorns!]
A planetary nebula, like the Ring
or the Dumbell, is a region of glowing gas that is left after a star exploded
as a nova or supernova. In earlier telescopes, planetary nebulae
were extended objects, not point sources like the stars. Thus, in
earlier times, planetary nebulae looked more planet-like than star-like.
With better telescopes, we are able to see the structure of these objects
more clearly. Nevertheless, we continue to use the inappropriate
term planetary nebula, an example of the conservatism of the astronomical
community.
Ptolemy, the ancient Greek astronomer,
named 48 constellations, regions of the sky associated with mythical figures.
The mythical figures were more important than the patterns of stars in
the constellations. Indeed, few constellations look much like the
figures they represent. Asterisms, on the other hand - the Big and
little Dippers, and the Teapot, for example - do resemble what they purport
to represent. And the heart of the constellation Cygnus, the Swan,
is easily seen as the Northern (or Christian) Cross.
Because the latitude of Athens
is almost as far north as that of New York, the Greeks had a lim-ited view
of the southern sky. The southern constellations were named much
later by modern astronomers from about 1600 AD. The entire sky is
now completely divided into 88 nonover-lapping constellations.
Many of the brighter stars were
named by the Greeks. For example, Sirius means scorching, an appropriate
name for the brightest star in the sky. And Graffias, meaning crab
or scorpion, is located in Scorpius. Some stars carry Roman names,
such as Polaris, the pole star, and Capella, the she-goat. Many stars
were named by the Arabs, for example, Altair, Aldebaran, Alcor, and others
beginning with Al.
The German astronomer Bayer proposed
a system of naming stars by a Greek letter followed by the name of a constellation,
for example a Centauri, or ß
Scorpii. The Greek letters are assigned in order of the stars' brightness
in each constellation - but not always. Flamsteed, a British astronomer,
assigned numbers to the stars. Nowadays constellations are no longer
used in assigning names to stars. Nevertheless, the well established
names of the brighter stars are still widely understood.
Some Late-Breaking Lighting News
Here are a couple of late items
from the Dark-Sky List. Connecticut now has the first state law requiring
full-cutoff roadway lighting on all roads. This means big
roads, little roads, dirt roads, super highways, primary roads, secondary
roads, etc.
The New York Assembly and Senate
have passed a Light Pollution Bill, now awaiting the governor's signature.
This bill requires the management of outdoor lighting to conserve energy
and protect the nighttime environment. Congratulations to SELENE,
a volunteer lobbying group that shepherded the bill through the legislature.
You too can keep up with the dark
sky news by subscribing to the following list. Besides the news on
legislation around the country, and the world, there is a lot of information
and discussion on various lighting problems and solutions: DarkSky-list-subscribe@yahoogroups.com
Bernie Zelazny reports a very
bright floodlight at the Highland Concrete Plant on the north side of US
90 just east of town. The light is blinding to westbound drivers
on the highway. When you're out at night, have a look - but don't
run off the road! There is another floodlight on that property aimed
northwest. This location is outside the city limits, but we will
see what can be done. In some cases, a city can claim an area of
extraterritorial jurisdiction outside its city limits and enforce some
of its ordinances.
Several new unshielded wallpacks
have recently been installed on the south and east sides of the new Multipurpose
Building at Sul Ross. I have not seen these lights in operation as
yet. Last year, the director of the physical plant assured me that
only full cutoff lights would be installed on this new building.
I spoke with him again when I saw these new unshielded lights. He
said the contract specified full cutoff lighting, but he later told me
the contractor disagreed and would not change the lights. The director
has a meeting scheduled with the contractor for July 3.
¡Y2K+1 Dues Now Payable:
Still only $20.00!
If we have not yet received your dues, then please use the convenient
envelope addressed to our treasurer that is included with this copy of
your Newsletter.
Betty Lou Grimm, Treasurer
Big Bend Astronomical Society, Inc
1001 N 2nd Street, Apt F-22
Alpine, TX 79830
¡COMING
EVENTS!
***
REGULAR MEETING ***
7:30 PM Wednesday, July 11, 300 Lawrence Hall, Sul
Ross Campus,
John Bell Presents:
Exploring Our Solar Origins: "Our Star and Our Star
Stuff"
or How Our Little Corner of the Universe Began
Star Party & Potluck Supper
Jim & Barbara Walkers'
9:00 PM, Saturday, July 14,
(Sunset 8:58 PM)
Alternative date: Sunday, July
15
No potluck suppers until the
Fall.
We will resume having our suppers
when we can meet earlier
after we go off daylight saving
time.
Please e-mail or call Bernie
Zelazny at 837-1717 if you need further information.
Visit
the Schedule Page for more info.
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