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Firstlight Newsletter of the Alachua Astronomy Club FirstLight Newsletter of the Alachua Astronomy Club 29° 39' N,82°21'W May 1995 Upcoming Monthly Events Next Meeting — Tuesday, May 9 University of Florida. Topic: "Can Observations Live Forever? — The • 7:00 p.m. Executive Council Meets. Astonishing Case of Beta Lyrae." • 7:30 p.m. Business Meeting. Synopsis: Dr. Wilson's talk will discuss • 8:00 p.m. Speaker: ProTessor Robert E. one of the best known eclipsing binaries, Wilson, Department oT Astronomy, Beta Lyrae, and the role amateurs have played observing this star. North Central Florida's Amateur Astronomy Club. Meets second Tuesday June Meeting — Tuesday, June 13 of each month, 7:30 p.m., Doyle Conner • 7:00 p.m. Executive Council Meets. Building, S.W. 34th Street at S.W. 20th • 7:30 p.m. Business Meeting. Avenue, Gainesville, Alachua County, Florida. General public and beginning star- • 8:00 p.m. Speaker: TBA gazers invited to all meetings, star parties and club events. No equipment needed. Upcoming Star Parties Call a club officer for more information. • May 13 (Saturday night). Arrive President Robert Jacobs Alachua (462-4558) before 7:00 pm EDT. Kanapah Vice-President Mark Cowan Botanical Gardens Moonlight Walk Gainesville (375-2564) (7:00-11:00 p.m.). Full Moon. Bring Treasurer Doug Richards telescopes for public. Free admission Gainesville (332-4317) for AAC members. See related story Publicity Pamela Mydock inside by Dave Godman. Lochloosa (481-5238) Star Parties Bruno Pancorbo • May 27 (Saturday night) Meet at Gainesville (373-0279) sunset, (8:22 p.m. EDT; sunrise 6:31 FirstlJght Chuck Broward a.m.). Observing location Bob Jacobs' Editors Melrose (475-1014) house (see map inside). No moonlight Howard Cohen Gainesville (376-5833) (two days before new moon). • June 3 (Saturday night). Rain date if World Wide Web Home Page at URL weather poor on May 27. Five day old http;//nervm.nerdc,ufl.edu/~cohenba waxing crescent sets near midnight. -P> FirstLight: Newsletter of the Alachua Astronomy Club Page 2 Minutes: April 11 Meeting — Mark Cowan We set the next star party date: novice astronomers, to increase club Saturday May 27. Rain date: Saturday participation and membership. A lesson June 3. Location: Bob Jacobs' house. period before star parties was discussed. Time: sundown. Bruno Pancorbo passed a sign-up Howard Cohen has scheduled sheet for those interested in observing speakers from t h e astronomy department at Watermelon Pond (usually late, on at UF tonight, for July, September, and new-moon weekends.) Call Bruno to get probably October. Tor August Pam directions at 373-0279. Mydoc will speak on the Perseids. We need a program for June. Videos of "The Dave Godman will be hosting a Astronomers," by PBS are available. program for a Brownie troop, May 5 or Also a video from the Discovery channel May 12. Call him at 377-9631, if you can about Dwell observatory's one hundredth give some time on this Friday evening anniversary is available. program. We have a standing invitation to the Saturday, May 6th is Astronomy Day. Moonlight Walk at Kanapaha Howard needs articles for the Botanical Gardens. We will be calling newsletter. E-Mail is the most club members with the date. convenient way to send them. Ryan Loftus won honors in the state Bob Jacobs spoke of his concern that science fair at Bradenton, winning fifth a planned cement plant near Newberry in the state, junior division, Earth will pollute his sky with light (at least). sciences category. Lie brought his project I Ie urged members to sign a petition, and on the measuring the diameter of the Sun voice our concerns as an astronomy club. using simple observing tools. $ Bob Jacobs talked about how to reach Get Published! Howard Cohen FirstLight needs writers, liver want to 1501 N.W. 28 St., Gainesville, FL publish an international best seller? Write 32605-5037. Use at least 12 point type; an article Tor FirstLight and we will also print dark. Better, e-mail material to him put it on the AAC's Web site Tor all the [email protected]. world to read! (Go to AAC's home page Other recommendations. Do not split at hltp.7/nervm.nerdc.uH.edu/~cohenba: words between lines (i.e., no hyphen- then jump to FirstLight. You will see ation) or indent new paragraphs (use a articles already published in past issues.) single blank line between paragraphs). Deadline Tor submission is two weeks Use a single space between sentences. after each monthly meeting. Send all 'Thanks to those who submitted material material to Howard I.. Cohen, Editor, Tor this issue. Q FirstLight: Newsletter of the Alachua Astronomy Club Page 5 Light Speed — Howard Cohen Elsewhere in this newsletter, George won't see the Sun go out for eight Russell, reflects on the "vastness of minutes! This latter number is the space." George notes that the light year is approximate light travel time for one AU. useful for simplifying measurements of Remember it and you can quickly figure long distances. He adds that he is also travel times to the planets at light speed. "quite comfortable with the light year." For example, when Voyager 2 passed While I agree that a light year is a simple through Saturn's ring system, this giant unit to use when giving large astro- planet was about 10 AU from the Earth. nomical distances, I'm not sure I can Earth-bound humans waited about 80 easily comprehend vast stellar distances. minutes before the radio signal arrived to Indeed, sci-fi episodes on TV or in the say, "Hey, I'm OK." movies almost seem to shrink astro- nomical distances down to a short hop. Now mind-boggle yourself and realize that Pluto, usually the outermost planet, Not withstanding warp drives (whatever creeps around the edge of the solar they are), consider light speed for a system 40 AU from the Sun. Therefore, if moment. During each second, radiation you leave the Earth on a spaceship (e.g., light or radio) travels about traveling at the speed of light, you will 186,000 miles. That's a bit fast for most still need over five hours to reach the earthlings to comprehend. Yet, this outer limits of our planetary system! incredible speed shrinks in comparison to Fortunately, as many FirstLight readers astronomical distances. The Moon is know (see the April issue), Pluto is 240,000 miles from Earth (more or less). presently near its closest point to the Sun, Simple division shows that radiation only 30 AU away! So, now is the time to requires about 1.3 seconds to travel an get out your old light-speed space buggy Earth-Moon distance. Make a call your for a journey to this small, cold world. Go moon buddies. Note that it takes nearly now and you will shorten your trip by three seconds to answer your hello even nearly 90 minutes! if they respond immediately! Back home, have you talked to anyone overseas For stay-at-home folks who have no lately? Today, long distance telephone speedy space buggies, remember this is often goes by communication satellites the season to see Pluto, our outermost about 22,000 miles up. Round trip time is planet. Pluto reaches opposition on May about one second, long enough to confuse 20. Shinning at magnitude +13.7, Pluto is long distance conversations when both bright enough to see in moderate size parties try to talk at nearly the same time! telescopes (8-in.?). Yes, dark, clear skies and some patience required. But give it Now consider old Sol 93 million miles the astronomer's try in the next several away, a distance called an astronomical weeks. Remember, we are the first unit (AU). Divide the Earth—Sun distance humans in history to witness Pluto near by light speed and discover sunlight its perihelion to the Sun. And don't needs over eight minutes to reach the forget, Pluto won't be this close or bright Earth. Pull the Sun's "plug" and you Tor nearly 250 years! <> FirstLight: Newsletter of the Alachua Astronomy Club Page 6 Star Party at Robert Jacobs — Bruno Pancorbo Seems like the Florida weather did it 11:00 p.m. we had to pack after some again. Even tough the clouds went away dew started to form in the instruments. about 9:00 p.m., there was some haze For me this was a special star party that stayed all night with us that because I was trying out my new eye decreased the transparency and increased pieces — a 8.8 mm UWA Meade and a the light pollution problem. 24.5 mm SWA Meade — but as I said We did not have many people this time. earlier the sky was not very good, so I Only five members of the club were have to wait Tor the next star party to test present (Dale, Dave, Robert, Michael, them. By the way if anybody is selling a and myself), but we had some visitors Telrad, please give me a call. (Robert Jacob's friends). T h e y all seemed As I mentioned before, only live very interested because they were asking members (counting Robert) of the club many questions to Dave who had the 6- showed up. I hope it was because the inch club's telescope. He showed them skies were not that great and not because how to use star charts and later some star there is lack of interest. I know that some clusters and the Orion Nebula that was of you live not very close from our setting in the West.
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