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Next Meeting: January 8, 2003
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As listed in Coming
Events, our next general meeting will be on Wednesday, January 8.
Our policy of holding a general meeting every other month seems to have
been successful, as attendance was higher during the second half of 2002.
We will, however, continue scheduling a star party each month because we
are so often clouded out. Please note in Coming
Events that we have scheduled a star party and potluck supper for December
28. Since going off Daylight Saving and back on Central Standard
Time, we have resumed having our potluck suppers at our star parties.
Please bring a covered dish and join us!
McDonald Observatory Searches
for Earthlike Planets
by Chris Roberts, Associated
Press Writer
(Edited from Associated Press,
El Paso, TX 12/03/02.) An "oddball" solar system with a star about
a third the size of the sun and a planet twice the size of Jupiter has
been studied for the first time. "We're going to see what types of
stars form certain types of planets," said lead researcher Fritz Benedict,
a McDonald Observatory astronomer. "Do big stars form big planets, and
small stars form small planets?
We now know that a small star
can form a big planet." The technique used, involved multiple extremely
precise measurements of the star's location as it wobbles, which is caused
by the gravitational pull of the orbiting planet. Researchers measured
the slight wobble of "Gliese 876" and then used the magnitude of that motion
to determine the size and shape of the planet's orbit and its mass.
"We have conclusively established the planetary nature of the (star's)
companion," Benedict said. New instruments, in particular those on
the Space Interferometry Mission, a space telescope scheduled for launch
in 2009, will allow hundreds of similar measurements speeding up the cosmic
census that ultimately is expected to reveal Earthlike planets.
Alan Boss, of the Carnegie Institute,
said, "When you find a long-orbit planet like Jupiter, there could
be room inside for there to be an Earth." Boss said. The current research
"really bodes well for what's com-ing in the future." Benedict said
the technique allows measurement of angles equivalent to the size of a
quarter seen from 3,000 miles away, which is one-half of a milli-arcsecond.
That accuracy combined with previous measurements allowed researchers to
determine the planet's mass, he said.
Gliese 876, which was the closest
of the known star-planet candidates, is about 15 light years from Earth,
Benedict said.
Hunt For Planets With Dr. Geoff Marcy
At W.M. Keck Observatory
from the Astronomical Society of the Pacific
The Astronomical Society of the
Pacific (ASP) announces a unique fundraising auction - an observing night
at the W.M. Keck Observatory in Hawai'i with internationally renowned astronomer
Dr. Geoff Marcy. The highlight of the five day/four night trip for
two is a once-in-a-lifetime opportunity to spend a night in the Keck I
control room with Dr. Marcy and his team during one of his scheduled observing
runs in 2003. Dr. Marcy will host dinner that evening, and the winner will
be able to sleep overnight at the VSQ (Visiting Scientists' Quarters),
which is open only to astronomers. The auction package includes round trip
airfare for two, resort accommodations, car rental, meals, and a behind-the-scenes
VIP tour of the W.M. Keck Observatory conducted by a Keck staff member.
Potential bidders can visit the ASP Web site at http://auction@astrosociety.org
immediately to get full information and to be notified exactly when the
auction will begin.
The auction will be held in mid-January
2003 on eBay. The winner can schedule the trip to coincide with any of
Dr. Marcy's scheduled observing nights in 2003. During first half of 2003
the dates are: February 15, May 17, June 12-15, July 7 and July 11-13.
The observing schedule for the second half of 2003 will be published in
June 2003. The Keck I and II twin 10-meter telescopes are the world's
largest optical telescopes, located at the summit of Mauna Kea on the Big
Island of Hawaii, at an altitude of 13,796 feet. The observatory headquarters,
Visiting Scientists' Quarters, and control rooms are located in Waimea,
at about 2,500 feet. Dr. Marcy, of the University of California,
Berkeley, and his research team are the world's premier planet hunters,
having uncovered more than seventy of the approximately 100 extrasolar
planets found to date. The team monitors the spectra of over 1,200 stars
and recently found a planetary system that bears some resemblance to our
own, with a planet in an orbit similar to Jupiter's orbiting a Sun-like
star. "I'm looking forward to observing with the auction winner as
we continue our search for extra-solar planets," said Dr. Marcy. "Every
time you have the privilege to point one of the giant Keck telescopes skyward
it feels like you're embarking on an epic voyage of discovery. You feel
a kinship with Galileo, Tycho Brahe, Kepler, Newton, Hubble and so many
others driven to explore the boundaries of the universe. And, on a practical
level, the auction is a wonderful way to contribute to the ASP's programs
that build science literacy, inspire kids, and nurture the next generation
of scientists and astronomers."
The auction is a fundraising event
for the ASP's nationwide education programs. These include The Universe
in the Classroom, a free, Web-based newsletter for teachers, the Society's
Web site with extensive resources for educators, Project ASTRO astronomer/teacher
partnerships in cities around the country, and the Society's public information
program, which responds to thousands of information requests every year
from students of all ages.
"The ASP wishes to express its
gratitude to Dr. Marcy and to the staff of the W.M. Keck Observatory for
making this unique fundraising event possible. We simply can't thank them
enough," said Michael Bennett, ASP Executive Director. "Furthermore,
the ASP is pleased to donate five percent of the winning bid to the amateur
astronomy club of the winner's choice," added Bennett. "We want to demonstrate
our support for the amateur astronomy community and their important outreach
and educational efforts."
About the Astronomical Society
of the Pacific: Founded in 1889, the non-profit Astronomical Society
of the Pacific (ASP) has grown far beyond the regional institution implied
in its name to become the world's largest general astronomy organization,
with members in all 50 states and over 70 countries. Bringing together
professional astronomers, amateur astronomers and science educators over
the last 114 years, the ASP has become an acknowledged leader in astronomy
education at all levels and a respected source of astronomical information
for the general public. The ASP produces several important general, technical,
and educational publications, including the bimonthly Mercury magazine
for all ASP members, the technical journal Publications of the Astronomical
Society of the Pacific, the ASP Conference Series, The Universe in the
Classroom teachers' newsletter, and others. In furtherance of its mission
in astronomy education, the ASP developed the NSF-funded Project ASTRO,
a nationwide program that partners amateur and professional astronomers
with teachers and classrooms. The Society also produces an extensive catalog
of astronomy-related products for educators, amateur astronomers, and the
public.
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