
Newsletter of the Desert Foothills Astronomy Club
Issue #21: February 3rd, 2008
Contact the Editor: Dan Heim, phone: 623.465.7307 or email:
| DFAC Events for 2008-2009: | ||||||
| Date | Time | Event | Location | |||
| Jan 30 | 7:00 pm - 9:00 pm | DFAC Lecture
Meeting #4 Speaker: Tom Polakis of SAC Topic: The Transition from Film to Digital |
Boulder Creek High School, 40404 North Gavilan Peak Parkway, Anthem, AZ 85086 | |||
| Feb 27 | 7:00 pm - 9:00 pm | DFAC Lecture
Meeting #5 Speaker: Jeff Hester of ASU Topic: Quantum Physics & Cosmology |
Boulder Creek High School, 40404 North Gavilan Peak Parkway, Anthem, AZ 85086 | |||
| Feb-April | sunset - ? pm | DFAC + PAS Astronomy Night | High Desert Park in Black Canyon City (date to be determined) | |||
| Mar 9 | 6:00 pm - 8:00 pm | Astronomy Night (DFAC fundraiser) | JW Marriott Desert Ridge Resort (north of Loop 101 on Tatum) | |||
| Mar 26 | 7:00 pm - 9:00 pm | DFAC Lecture
Meeting #6 Speaker: JD Maddy of AVV Topic: A Personal Tour of Mauna Kea |
Boulder Creek High School, 40404 North Gavilan Peak Parkway, Anthem, AZ 85086 | |||
| Apr 30 | 7:00 pm - 9:00 pm | DFAC Lecture
Meeting #7 Speaker: Scott Loucks of DFAC Topic: Minor Planet Astrometry |
Boulder Creek High School, 40404 North Gavilan Peak Parkway, Anthem, AZ 85086 | |||
| May 28 | 7:00 pm - 9:00 pm | DFAC Business Meeting | Boulder Creek High
School, 40404 North Gavilan Peak Parkway, Anthem, AZ
85086 Legends Sports Bar & Grill, 3655 W Anthem Way Suite D115, Anthem, AZ 85086 |
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| Next Meeting: Wednesday, February 27th, 2008 |
| Our February meeting will feature ASU astronomer Dr. Jeff Hester. Dr. Hester never fails to enlighten and astonish, with his personal experiences within the professional astronomical community, his solid grasp of physics and cosmology, and his remarkable talent for explaining the (at first) incomprehensible. You don't want to miss this one! To learn more about Dr. Hester, visit his website at: http://eagle.la.asu.edu/hester/ |
| Last Meeting: Wednesday, January 30th, 2008 |
| Dan Heim opened the meeting with about
10 minutes of club business, discussing upcoming
fundraisers, science fairs, and the need to renew our
domain name (www.dfacaz.org). Read more below in his
State of DFAC section.
He then turned the lectern over to Tom Polakis, local astrophotographer extraordinaire. Tom Polakis spoke on the topic of "Basic Sky Photography," intending to show us that, even without guided tracking, anyone can shoot outstanding photos of the sky (night or day).
Tom's presentation was a retrospective, of sorts, documenting places he's been and things he's seen. It all started back in grade school, when he got his first scope. This image shows him at age 15, drooling over what appears to be a 6" Newtonian reflector (not a bad starter scope).
We learned that, simply by setting the aperture, exposure, and ISO, excellent sky photos can be had with just about any lens. If you have a digital SLR (Tom uses a Canon) with interchangeable lenses, owning a fisheye, wide-angle, and a few telephotos opens up a whole new realm of possibilities ... even (as we said) without guided tracking. Some of Tom's shots were tripod mount, others hand held. All demonstrated a keen eye and tested experience. Tom's repertoire included star fields, the Milky Way, planetary conjunctions, star trails, solar and lunar eclipses, and comets. Of special interest were shots of some daytime optical phenomena, like rainbows, glories, parhelia, and other arcane luminous displays. If you have an interest in daytime phenomena, the ultimate website is Atmospheric Optics at: http://www.atoptics.co.uk/
After the presentation, there was time for Q&A. Several members availed themselves of Tom's expertise with some great questions about techniques. Tom was more than happy to share what he's learned over the years. Thanks, Tom, for an enlightening evening! We hope to see you back next year with even more great photos. For those members who missed this excellent presentation, you can view Tom's photographic work at: http://www.pbase.com/polakis/
Membership turnout was low for what I thought was a beautiful evening. Seven members were in attendance. Below you see Tom & Jennifer Polakis at left, and new member Don Nelson seated third from right. Not shown are Roger Serrato (on camera) and Dan Heim (on bass).
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| State of DFAC: By Dan Heim, President |
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| Quote of the Month: |
| "We have your
satellite. If you want it back, send 20 billion in
Martian money. No funny business or you will never see it
again." Seen on a bulletin board at NASA's Jet Propulsion Labs |
| Space Debris: |
| The February 2008 issue of Discover magazine contains a fascinating article that I want to call your attention to. I'm sure you recall the famous experiments by Drs. Stanley Miller and Harold Urey at the University of Chicago back in the 1950s. They showed that, by replicating the chemical end electrical properties of Earth's early atmosphere, amino acids (the basic building blocks of life) would spontaneously assemble. Turns out that Miller placed in similar mixture of chemicals in ice, and had kept them frozen at -108 °F for some 25 years. As his lab at UCSD was being disassembled, some of his former graduate students acquired those frozen vials. What they found was truly amazing, and bodes well for the emergence of life in environments previously discounted as "too cold." I highly recommend this article. This issue of Discover is still on the newstands, but better get your while supplies last. |