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Schedule of Meetings: 2nd Half of 2002
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At our meeting on June 12, we decided
to hold only two more meetings in 2002, on the following dates: Wednesday
September 11, and Wednesday November 13. Our policy of holding only
3 general meetings during the first half of the year seems to have worked,
in that our attendance was higher than when we were meeting every month.
Our Perseid Watch
Five hardy and hopeful BBAS members
gathered at the Walkers’ in spite of rather heavy clouds. How-ever,
by about 10:30 PM the heavy clouds had disappeared leaving no more than
perhaps 10% very light clouds. We saw several good Perseids, some
leaving briefly glowing trails. We saw about 50 Perseids and about
half as many sporadics.
Friends in Sunny Glen saw a better
display about 4:00 AM. The consensus in the astro community seems
to be that we had about an average year for the Perseids. Better
luck next time!
Voyagers to Mark 25th Year in
Space
(Edited from NASA, August
16, 2002) Our twin spacecraft,
Voyager 1 and Voyager 2, will soon complete 25 years in space. Voyager
2 was launched first, on August 20, 1977, and Voyager 1 was launched later
on September 5, 1977.
These spacecraft have made a wealth
of discoveries about our four gas-giant planets and their 48 moons, including
volcanoes on Jupiter's moon Io. As NASA marks the mission's silver
anniversary, they hope at least one Voyager will pass beyond the boundary
of the Sun's influence before the onboard nuclear power supply runs down.
Voyager 1 is now the most distant human-made object, about 85 times as
far from the Sun as Earth is. This spacecraft is now about 6 billion
miles from the sun, about twice the current 2.8-billion-mile distance of
Pluto, heading toward interstellar space at more than 35,000 mph. Voyager
2 is now about 68 times the Sun-Earth distance. Both spacecraft are
still going strong, although they were designed for only a four-year journey
to Jupiter and Saturn. The Voyager team still receives information
almost daily from the two spacecraft, now traveling beyond all the planets.
"A radio signal traveling at the
speed of light takes nearly 12 hours to travel between Voyager 1 and Earth,”
said Ed Massey, Voyager's project manager. He noted that if something
went wrong on board, a full day would lapse before we could know about
the problem and send commands to fix it. So the project team tries
to anticipate any emergencies, Massey said.
Whatever their future holds, the
Voyagers have already performed superbly. Among their big surprises:
Jupiter's moon Io has active volcanoes; Saturn's rings have kinks and spoke-like
features; Miranda, a small moon of Uranus, has a jumble of old and new
surfacing; Neptune has the fastest winds of any planet; and Neptune's moon
Triton has active geysers. Long after they fall silent, the Voyagers
will keep speeding away from our solar system, each carrying an "interstellar
outreach program" of recorded sounds and images from Earth, Massey said.
For more information, visit http://www.nasa.gov.
The Galileo Problem,
by John Bell
Giovanni Belli will be our guest
at our September meeting. Coming from the 17th century, he will explain
why so many in the Italian academic community are pleased to see that the
Vatican has finally decided to act against Galileo Galilei. This fellow
is an argumentative, scheming, stubborn man whose opinions are in error
and who is meddling in things that are not his business. Don't just
go along with common thinking about Galileo. Come and hear the other
side of the case.
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