The Hubble Ultra Deep Field Image (see description on the right, below)

The Hubble Ultra Deep Field Image
(10,000 galaxies in an area 1% of the apparent size of the moon -- see description on the right, below)

Wednesday, August 5, 2020

2020 August

AEA Astronomy Club Newsletter                         August 2020

 

Contents


AEA Astronomy Club News & Calendar p.1
Video(s) & Picture(s) of the Month p. 2
Astronomy News p. 8
General Calendar p. 12

    Colloquia, lectures, mtgs. p. 12
    Observing p. 14

Useful Links p. 16
About the Club p. 17

Club News & Calendar.

Club Calendar

 

Club Meeting Schedule: --

6 Aug

AEA

TBD

(A1/1735)

AEA Astronomy Club Meeting

Great Courses video “The Brightest Supernova in 400 Years ”

Teams

 

3 Sept

AEA Astronomy Club Meeting

 TBD -- Great Courses video

(Teams)

 

AEA Astronomy Club meetings are now on 1st  Thursdays at 11:45 am.  For 2020:  March 5 & April 2 in A1/2906 and for the rest of 2020 (Jan., Feb., May-Dec), the meeting room is A1/1735. 

 

Club News:  

 

We have received our AEA funding for the year -- $4,000 as requested.  We had some ideas how to spend it, but if you have any additional ones, feel free to share.

 

This year’s annual night at Mt. Wilson Sept. 12, on the 100-inch telescope, has a full roster, and a few on the waiting list. We may know later in July whether it is likely that the observing night will be held in the COVID-19 shutdown.  $100 per person will be required at that time (the rest is subsidized by the club budget).  But we sometimes have several drop out as the time approaches, so we can still add you to the waiting list. Next year will be the 60-inch telescope – we alternate between the 2 telescopes. The evening often includes a tour of the Aerospace MAFIOT facility, and a Mt. Wilson docent tour.

 

We need volunteers to help with: 

 

·         Assembling our new 16-inch Hubble Optics Dobs

·         Installing our new software on our tablet & laptop

·         Populating our club Sharepoint site with material & links to the club’s Aerowiki & Aerolink materials – Kaly Rangarajan has volunteered to help with this

·         Arranging future club programs

·         Managing club equipment & library (Kelly Gov volunteered to help with the library)

 

 

Astronomy Video(s) & Picture(s) of the Month

(generally from Astronomy Picture of the Day, APOD: http://apod.nasa.gov/apod/archivepix.html)

VIDEO:  A Flight through the Hubble Ultra Deep Field https://apod.nasa.gov/apod/ap200726.html
Video Credit: NASAESA, F. Summers, Z. Levay, L. Frattare, B. Mobasher, A. Koekemoer and the HUDF Team (STScI)

Explanation: What would it look like to fly through the distant universe? To find out, a team of astronomers estimated the relative distances to over 5,000 galaxies in one of the most distant fields of galaxies ever imaged: the Hubble Ultra Deep Field (HUDF). Because it takes light a long time to cross the universe, most galaxies visible in the featured video are seen when the universe was only a fraction of its current age, were still forming, and have unusual shapes when compared to modern galaxies. No mature looking spiral galaxies such as our Milky Way or the Andromeda galaxy yet exist. Toward the end of the video the virtual observer flies past the farthest galaxies in the HUDF field, recorded to have a redshift past 8. This early class of low luminosity galaxies likely contained energetic stars emitting light that transformed much of the remaining normal matter in the universe from a cold gas to a hot ionized plasma.

VIDEO:  Rotating Moon from LRO https://apod.nasa.gov/apod/ap200719.html
Video Credit: NASALROArizona State U.

Explanation: No one, presently, sees the Moon rotate like this. That's because the Earth's moon is tidally locked to the Earth, showing us only one side. Given modern digital technology, however, combined with many detailed images returned by the Lunar Reconnaissance Orbiter (LRO), a high resolution virtual Moon rotation movie has been composed. The featured time-lapse video starts with the standard Earth view of the Moon. Quickly, though, Mare Orientale, a large crater with a dark center that is difficult to see from the Earth, rotates into view just below the equator. From an entire lunar month condensed into 24 seconds, the video clearly shows that the Earth side of the Moon contains an abundance of dark lunar maria, while the lunar far side is dominated by bright lunar highlands. Currently, over 19 new missions to the Moon are under active development from eight different countries, most of which have expected launch dates in the next three years.

VIDEO: Comet NEOWISE Rising over the Adriatic Sea https://apod.nasa.gov/apod/ap200713.html
Video Credit & Copyright: Paolo Girotti

Explanation: This sight was worth getting out of bed early. Comet C/2020 F3 (NEOWISE) has been rising before dawn during the past week to the delight of northern sky enthusiasts awake that early. Up before sunrise, the featured photographer was able to capture in dramatic fashion one of the few comets visible to the unaided eye this century, an inner-Solar System intruder that might become known as the Great Comet of 2020. The resulting video details Comet NEOWISE from Italy rising over the Adriatic Sea. The time-lapse video combines over 240 images taken over 30 minutes. The comet is seen rising through a foreground of bright and undulating noctilucent clouds, and before a background of distant stars. Comet NEOWISE has remained unexpectedly bright, so far, with its ion and dust tails found to emanate from a nucleus spanning about five kilometers across. Fortunately, starting tonight, northern observers with a clear and dark northwestern horizon should be able to see the sun-reflecting interplanetary snowball just after sunset.

 

VIDEO:  Our Rotating Earth https://apod.nasa.gov/apod/ap200701.html
Video Credit & Copyright: Bartosz Wojczyński

Explanation: Has your world ever turned upside-down? It would happen every day if you stay fixed to the stars. Most time-lapse videos of the night sky show the stars and sky moving above a steady Earth. Here, however, the camera has been forced to rotate so that the stars remain fixed, and the Earth rotates around them. The movie, with each hour is compressed to a second, dramatically demonstrates the daily rotation of the Earth, called diurnal motionThe video begins by showing an open field in NamibiaAfrica, on a clear day, last year. Shadows shift as the Earth turns, the shadow of the Earth rises into the sky, the Belt of Venus momentarily appears, and then day turns into night. The majestic band of our Milky Way Galaxy stretches across the night sky, while sunlight-reflecting, Earth-orbiting satellites zoom by. In the night sky, you can even spot the Large and Small Magellanic Clouds. The video shows a sky visible from Earth's Southern Hemisphere, but a similar video could be made for every middle latitude on our blue planet.

 

Comet NEOWISE from the ISS
Image Credit: NASAISS Expedition 63

Explanation: Rounding the Sun on July 3rd and currently headed for the outer Solar System, Comet NEOWISE (C/2020 F3) has been growing brighter in the predawn skies of planet Earth. From low Earth orbit it also rises before the Sun, captured above the approaching glow along the eastern horizon in this snapshot from the International Space Station on July 5. Venus, now Earth's morning star is the brilliant celestial beacon on the right in the field of view. Above Venus you can spot the sister stars of the more compact Pleiades cluster. Earthbound skygazers can spot this comet with the unaided eye, but should look for awesome views with binoculars.


The Structured Tails of Comet NEOWISE
Image Credit & Copyright: Zixuan Lin (Beijing Normal U.)

Explanation: What is creating the structure in Comet NEOWISE's tails? Of the two tails evident, the blue ion tail on the left points directly away from the Sun and is pushed out by the flowing and charged solar wind. Structure in the ion tail comes from different rates of expelled blue-glowing ions from the comet's nucleus, as well as the always complex and continually changing structure of our Sun's wind. Most unusual for Comet C/2020 F3 (NEOWISE), though, is the wavy structure of its dust tail. This dust tail is pushed out by sunlight, but curves as heavier dust particles are better able to resist this light pressure and continue along a solar orbit. Comet NEOWISE's impressive dust-tail striations are not fully understood, as yet, but likely related to rotating streams of sun-reflecting grit liberated by ice melting on its 5-kilometer wide nucleus. The featured 40-image conglomerate, digitally enhanced, was captured three days ago through the dark skies of the Gobi Desert in Inner MongoliaChinaComet NEOWISE will make it closest pass to the Earth tomorrow as it moves out from the Sun. The comet, already fading but still visible to the unaided eye, should fade more rapidly as it recedes from the Earth.

 

Mercury's Sodium Tail


Image Credit & Copyright: Andrea Alessandrini

Explanation: What is that fuzzy streak extending from Mercury? Long exposures of our Solar System's innermost planet may reveal something unexpected: a tail. Mercury's thin atmosphere contains small amounts of sodium that glow when excited by light from the Sun. Sunlight also liberates these molecules from Mercury's surface and pushes them away. The yellow glow from sodium, in particular, is relatively bright. Pictured, Mercury and its sodium tail are visible in a deep image taken in late May from Italy through a filter that primarily transmits yellow light emitted by sodium. First predicted in the 1980s, Mercury's tail was first discovered in 2001. Many tail details were revealed in multiple observations by NASA's robotic MESSENGER spacecraft that orbited Mercury between 2011 and 2015. Tails are usually associated with comets. The tails of Comet NEOWISE are currently visible with the unaided eye in the morning sky.

 

The Giants of Summer
Image Credit & Copyright: Jean-Luc Dauvergne

Explanation: As Comet NEOWISE sweeps through northern summer skies, Jupiter and Saturn are shining brightly, near opposition. With Jupiter opposite the Sun on July 14 and Saturn on July 21, the giant planets are still near their closest to planet Earth in 2020. Sharing the constellation Sagittarius they are up all night, and offer their best and brightest views at the telescope. Both captured on July 22 from a balcony in Paris these two sharp telescopic images don't disappoint, showing off what the giant planets are famous for, Saturn's bright rings and Jupiter's Great Red Spot. These giants of the Solar System are worth following during 2020. On December 21, skygazers can watch the once-in-20-year great conjunction of Jupiter and Saturn.


Meeting in the Mesosphere
Image Credit & CopyrightStephane Vetter (TWANNuits sacrees)

Explanation: A sensitive video camera on a summit of the Vosges mountains in France captured these surprising fireworks above a distant horizon on June 26. Generated over intense thunderstorms, this one about 260 kilometers away, the brief and mysterious flashes have come to be known as red sprites. The transient luminous events are caused by electrical breakdown at altitudes of 50 to 100 kilometers. That puts them in the mesophere, the coldest layer of planet Earth's atmosphere. The glow beneath the sprites is from more familiar lighting though, below the storm clouds. But on the right, the video frames have captured another summertime apparition from the mesophere. The silvery veins of light are polar mesospheric clouds. Also known as noctilucent or night shining clouds, the icy clouds still reflect the sunlight when the Sun is below the horizon.

 

 

 

Astronomy News:

 

This is the first picture of a sunlike star with multiple exoplanets 

https://www.sciencenews.org/article/first-picture-sun-like-star-multiple-exoplanets-astronomy-planets

 

Unlike our solar system, this one has two massive gas giants with far-out orbits 

The star TYC 8998-760-1 (top center) was photographed with two giant exoplanets (arrows), the first time astronomers have directly imaged more than one planet orbiting a sunlike star. The bright spots above star TYC 8998-760-1 are other stars in the background.

BOHN ET AL/ESO

For the first time, an exoplanet family around a sunlike star has had its portrait taken. Astronomers used the Very Large Telescope in Chile to snap a photo of two giant planets orbiting a young star with about the same mass as the sun, researchers report July 22 in The Astrophysical Journal Letters.

The star, called TYC 8998-760-1, is about 300 light-years away in the constellation Musca. At just 17 million years old, the planetary family is a youngster compared with the 4-billion-year-old solar system.

Although astronomers have found thousands of exoplanets, most aren’t observed directly. Instead they are spotted as shadows crossing in front of their stars, or inferred as unseen forces tugging at their stars.

Only a few tens of planets have been photographed around other stars, and just two of those stars have more than one planet. Neither is sunlike, says astronomer Alexander Bohn of Leiden University in the Netherlands — one is more massive than the sun, the other less massive.

Both of this star’s planets are unlike anything seen in the solar system. The inner planet, a giant weighing 14 times the mass of Jupiter, is 160 times farther from its star than Earth is from the sun. The outer one weighs six times Jupiter’s mass and orbits at twice its sibling’s distance. In comparison, the Voyager 1 spacecraft, which flew past the boundary marking the sun’s magnetic influence and into interstellar space in 2012, is still closer to the sun than either planet is to its star (SN: 9/12/13).

This exoplanet family could provide new insight into how solar systems can form. “As with many other exoplanet discoveries, this discovery makes us aware of other scenarios that we did not think of,” Bohn says.

CITATIONS

A. J. Bohn et al. Two directly-imaged, wide-orbit giant planets around the young, solar analogue TYC 8998-760-1The Astrophysical Journal Letters, July 22, 2020. doi:10.3847/2041-8213/aba27e

 

Pinning down the sun’s birthplace just got more complicated

https://www.sciencenews.org/article/sun-birthplace-complicated-star-cluster-astronomy-space

 

Our star’s birthplace might have been a tight, stellar cluster, researchers say

Many astronomers think that a loose association of thousands of stars, like the cluster NGC 2244 in the Rosette Nebula shown here, is where the sun was born. A new study suggests there’s another possibility.

JPL-CALTECH/NASA, UNIV. OF ARIZ.

The sun could come from a large, loose-knit clan or a small family that’s always fighting.

New computer simulations of young stars suggest two pathways to forming the solar system. The sun could have formed in a calm, large association of 10,000 stars or more, like NGC 2244 in the present-day Rosette Nebula, an idea that’s consistent with previous research. Or the sun could be from a violent, compact cluster with about 1,000 stars, like the Pleiades, researchers report July 2 in the Astrophysical Journal.

Whether a star forms in a tight, rowdy cluster or a loose association can influence its future prospects. If a star is born surrounded by lots of massive siblings that explode as supernovas before a cluster spreads out, for example, that star will have more heavy elements to build planets with (
SN: 8/9/19).

To nail down a stellar birthplace, astronomers have considered the solar system’s chemistry, its shape and many other factors. Most astronomers who study the sun’s birthplace think the gentle, large association scenario is most likely, says astrophysicist Fred Adams of the University of Michigan in Ann Arbor, who was not involved in the new work.

But most previous studies didn’t include stars’ motions over time. So astrophysicists Susanne Pfalzner and Kirsten Vincke, both of the Max Planck Institute for Radio Astronomy in Bonn, Germany, ran thousands of computer simulations to see how often different kinds of young stellar families produce solar systems like ours.

The main solar system feature that the pair looked for was the distance to the farthest planet from the star. Planet-forming disks can extend to hundreds of astronomical units, or AU, the distance between the Earth and the sun (SN: 7/16/19). Theoretically, planets should be able to form all the way to the edge. But the sun’s planetary material is mostly packed within the orbit of Neptune.

“You have a steep drop at 30 AU, where Neptune is,” Pfalzner says. “And this is not what you expect from a disk.”

In 2018, Pfalzner and her colleagues showed that a passing star could have truncated and warped the solar system’s outer edge long ago. If that’s what happened, it could help point to the sun’s birth environment, Pfalzner reasoned. The key was to simulate groupings dense enough that stellar flybys happen regularly, but not so dense that the encounters happen too often and destroy disks before planets can grow up.

“We were hoping we’d get one answer,” Pfalzner says. “It turned out there are two possibilities.” And they are wildly different from each other.

Large associations have more stars, but the stars are more spread out and generally leave each other alone. Those associations can stay together for up to 100 million years. Compact clusters, on the other hand, see more violent encounters between young stars and don’t last as long. The stars shove each other away within a few million years.

“This paper opens up another channel for what the sun’s birth environment looked like,” Adams says, referring to the violent cluster notion.

The new study doesn’t cover every aspect of how a tight cluster could have affected the nascent solar system. The findings don’t account for how radiation from other stars in the cluster could erode planet-forming disks, for example, which could have shrunk the sun’s disk or even prevented the solar system from forming. The study also doesn’t explain certain heavy elements found in meteorites, which are thought to come from a nearby supernova and so could require the sun come from a long-lived stellar family.

“I think [the research] is an interesting addition to the debate,” Adams says. “It remains to be seen how the pieces of the puzzle fit together.”

Pfalzner thinks that the star cluster would break apart before radiation made a big difference, and there are other explanations for the heavy elements apart from a single supernova. She hopes future studies will be able to use that sort of cosmic chemistry to narrow the sun’s birthplace down even further.

“For us humans, this is an important question,” Pfalzner says. “It’s part of our history.”

CITATIONS

S. Pfalzner and K. Vincke. Cradle(s) of the sunThe Astrophysical Journal. Published July 2, 2020. doi:10.3847/1538-4357/ab9533.

S. Pfalzner et al. Outer solar system possibly shaped by a stellar fly-byThe Astrophysical Journal. Published August 9, 2018. doi:10.3847/1538-4357/aad23c.

 

 

 General Calendar:

Colloquia, Lectures, Seminars, Meetings, Open Houses & Tours:


Colloquia:  Carnegie (Tues. 4pm), UCLA, Caltech (Wed. 4pm), IPAC (Wed. 12:15pm) & other Pasadena (daily 12-4pm):  http://obs.carnegiescience.edu/seminars/ 

 

6 Aug

AEA

TBD

(A1/1735)

AEA Astronomy Club Meeting

Great Courses video “The Brightest Supernova in 400 Years ”

Teams

 

 

 

Cancelled for now

 

Friday Night 7:30PM SBAS  Monthly General Meeting

in the Planetarium at El Camino College (16007 Crenshaw Bl. In Torrance)

 


Aug 20 The von Kármán Lecture Series: 2020

Venus: Earth’s Evil Twin or Just Misunderstood?

Time: 7 p.m. PDT (10 p.m. EDT; 0200 UTC)
Venus is becoming more attractive to scientists as technology improves for sending spacecraft to survive orbit and even descend to the surface. From orbiters to balloons, we will talk about the great science that can be done, how we can do it and what we hope to learn.

Host:
Brian White

Speaker(s):
Sue Smrekar, Rocky Planet Geoscientist

Webcast:
› Click here to watch the event live on YouTube
› Click here to watch the event live on Ustream

Past shows are archived on YouTube.

› Click here for the YouTube playlist of past shows

 

 

Cancelled

LAAS General Mtg. 7:30pm Griffith Observatory (private)

 

 

 

Aug 9

  

UCLA Meteorite Gallery

DR. MEENAKSHI WADHWA

ROCKS FROM SPACE – TALES FROM THE METEORITE VAULT

Location: https://ucla.zoom.us/meeting/register/tJEqduyupj0vGd3S0_52FsbHTbPjYr0sZQUj
Time: 2:30PM

Our Solar System and life as we know it could not have evolved as it did without impacts, which are perhaps the most influential among the processes shaping the surfaces of planets and moons. Early in the history of our Solar System, collisions between bodies were a key process in the growth of planets. In fact, our Moon was likely formed as the result of a giant impact on the early Earth. In the case of the Earth, the raw materials for kick-starting life may have been delivered to the surface by meteorite impacts. And the course of life on our planet has been greatly altered by the huge meteorite impacts (such as the one that killed off the dinosaurs about 65 million years ago). Are large impacts a thing of the past, or are they likely to occur in the near future? Our future may well depend on understanding and mitigating this risk. While studying samples returned from missions to asteroids will be important for this purpose, we already have many tens of thousands of asteroidal samples here on Earth that are readily and more cheaply available for us to study – these are the meteorites (rocks from space!) in our rock collections at museums and universities. While most of these meteorites indeed come from asteroids, there are also some rare kinds that come from the Moon and the planet Mars, and we can learn about the geologic histories of these planetary bodies from studying these samples. In this talk, I will discuss our current understanding of meteorites and how they are key to answering some of humanity’s biggest questions: Are we alone in the Universe or is there life elsewhere? How and when did our Solar System and planets form? Where did the water in the Earth and other planetary bodies in our Solar System come from? How did life originate on our planet?

 

3 Sept

AEA Astronomy Club Meeting

 TBD -- Great Courses video

(Teams)

Observing:

 

The following data are from the 2020 Observer’s Handbook, and Sky & Telescope’s 2020 Skygazer’s Almanac & monthly Sky at a Glance.

 

Current sun & moon rise/set/phase data for L.A.:  http://www.timeanddate.com/astronomy/usa/los-angeles

 

Sun, Moon & Planets for August:

 

   

 

Moon: Aug 3 Full, Aug 11 last quarter, Aug 19 new, Aug 25 1st quarter                

Planets: Venus is a brilliant morning star all month.  Mars rises in late evening. Jupiter visible at dusk and sets around 3:30 a.m. local daylight-saving time, Saturn visible at dusk roughly 8 degrees east of Jupiter,  Mercury visible at dawn to the 8th.

Other Events:

 

1 August Alpha Capricornids Meteor Shower Peak Alpha Capricornids is a meteor shower that takes place as early as 15 July and continues until around 10 August. The meteor shower was discovered by Hungarian astronomer Miklos von Konkoly-Thege in 1871. This shower has infrequent but relatively bright meteors, with some fireballs. Parent body is comet 169P/NEAT. The bulk of the dust will not be in Earth's path until the 24th century. The Alpha Capricornids are expected to become a major annual storm in 2220–2420 A.D., one that will be "stronger than any current annual shower." Mark your calendars now!

 

Cancelled

LAAS The Garvey Ranch Observatory is open to the public every Wednesday evening from 7:30 PM to 10 PM. Go into the dome to use the 8 Inch Refractor or observe through one of our telescopes on the lawn. Visit our workshop to learn how you can build your own telescope, grind your own mirror, or sign up for our free seasonal astronomy classes. 

Call 213-673-7355 for further information.

Time: 7:30 PM - 10:00 PM

Location: Garvey Ranch Obs. , 781 Orange Ave., Monterey Park, CA 91755

 

8 Aug?

SBAS In-town observing session – In Town Dark Sky Observing Session at Ridgecrest Middle School– 28915 NortbBay Rd. RPV, Weather Permitting: Please contact Ken Rossi or Ken Munson to confirm that the gate will be opened. http://www.sbastro.net/.   Only if we get permission to use the school grounds again and CDC guidelines are reduced

 

9 Aug Mars 0.8 deg N of Moon

 

12 August Perseid Meteor Shower Peak Perhaps the most reliable of meteor showers, the Perseids can be up to 60 meteors per hour during the peak.

 

13 Aug Venus greatest elongation W (46 deg)

 

15 Aug

LAAS Private dark sky  Star Party

 

15 Aug?

SBAS out-of-town Dark Sky observing – contact Greg Benecke to coordinate a location. http://www.sbastro.net/.  

 

22 Aug

LAAS Public  Star Party: Griffith Observatory Grounds 2-10pm See http://www.griffithobservatory.org/programs/publictelescopes.html#starparties  for more information.

 

29 Aug Jupiter 1.4 deg N of Moon, Saturn 2 deg N of moon

 

Internet Links:

 

Telescope, Binocular & Accessory Buying Guides

Sky & Telescope Magazine -- Choosing Your Equipment

Orion Telescopes & Binoculars -- Buying Guides

Telescopes.com -- Telescopes 101

 

General

 

Getting Started in Astronomy & Observing

The Astronomical League

 e! Science News Astronomy & Space

NASA Gallery

Astronomical Society of the Pacific (educational, amateur & professional)

Amateur Online Tools, Journals, Vendors, Societies, Databases

The Astronomy White Pages (U.S. & International Amateur Clubs & Societies)

American Astronomical Society (professional)

More...

 

Regional (Southern California, Washington, D.C. & Colorado)

Southern California & Beyond Amateur Astronomy Organizations, Observatories & Planetaria

Mt. Wilson Observatory description, history, visiting

Los Angeles Astronomical Society (LAAS)

South Bay Astronomical Society (SBAS)

Orange County Astronomers

The Local Group Astronomy Club (Santa Clarita)

Ventura County Astronomical Society

The Astronomical Society of Greenbelt

National Capital Astronomers

Northern Virginia Astronomy Club

Colorado Springs Astronomical Society

Denver Astronomical Society

 

 

About the Club

Club Websites:  Internal (Aerospace): https://aeropedia.aero.org/aeropedia/index.php/Astronomy_Club  It is updated to reflect this newsletter, in addition to a listing of past club mtg. presentations, astronomy news, photos & events from prior newsletters, club equipment, membership & constitution.  We have linked some presentation materials from past mtgs.  Our club newsletters are also being posted to an external blog, “An Astronomical View” http://astronomicalview.blogspot.com/. 

 
Membership.  For information, current dues & application, contact Alan Olson, or see the club website (or Aerolink folder) where a form is also available (go to the membership link/folder & look at the bottom).  Benefits will include use of club telescope(s) & library/software, membership in The Astronomical League, discounts on Sky & Telescope magazine and Observer’s Handbook, field trips, great programs, having a say in club activities, acquisitions & elections, etc.

Committee Suggestions & Volunteers.  Feel free to contact:  Mark Clayson, President & Program Committee Chairman, Walt Sturrock, VP, Kelly Gov club Secretary (& librarian), or Alan Olson, Resource Committee Chairman (over equipment, and club Treasurer).

Mark Clayson,
AEA Astronomy Club President

 


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