McDonald Observatory

5 10 2011
Cover, Big and Bright

Cover, Big and Bright

So, to pick up from where I left off in the story of Frank K. Edmondson’s career, I’d like to share a few thoughts on McDonald Observatory.

My last post reported the intellectual and labor connections between Lowell Observatory and the Department of Astronomy at Indiana University (established via W. A. Cogshall). Edmondson did the work for his Master’s thesis on the motions of the globular clusters and galactic rotation at Lowell. After finishing his thesis, he stayed on for another year at the observatory, taking plates for Clyde Tombaugh, before matriculating at Harvard University. He went to Harvard with the understanding that if he finished his Ph.D., there would be a place waiting for him at Indiana University, and that’s just how it worked out. He apparently had to choose between the new  position at Indiana and a more established position at UVa. Howard Shapley counseled him to take the place that had been created for him at IU, because he felt it was more important to expand the number of astronomy posts across the academy than to settle into an established spot at UVa.

At the time, it must have seemed like a strange decision. Edmondson had been working on stellar kinematics (study of the movement of stars), so it would’ve made more sense for him to go work with Alexander Vyssotksy, who was focusing on galactic kinematics and proper motion, at Virginia. But, as we know, Edmondson had many successes at Indiana, including his role in founding a cooperative project between IU, Texas (McDonald Observatory) and Chicago. Actually, Edmondson credited Otto Struve for the start of the project, noting that Struve had published a paper calling for more cooperation in the profession.

From Edmondson’s oral history:

[Edmondson]: “If my memory’s right, Struve’s paper is to be found in the SCIENTIFIC MONTHLY. In the neighborhood of somewhere around 1938, ’39, somewhere along in there. Struve had an article called “Cooperation in Astronomy.” And his basic thesis was — “Look,” he said, “we’re training young astronomers, and then they’re going to schools where they have no telescopes at all, and something has to be done to provide them with the means to continue their scientific careers.”

“So his proposal at that time was to get some university interested in this sort of thing, and go to a foundation to get money for a second telescope at the McDonald Observatory.

“So I wrote to Struve, and asked him for two or three reprints of his article. I said, “I would like to have our President and some of the deans here read what you have written.

“So Struve sent me the reprints, and he said, “I’m also interested in getting going as fast as we can, so here’s my proposal.”

“He said that Vyssotsky had been in communication with him about doing this K star work at McDonald, and Virginia had not been able to raise the funds to pay for the telescope time that would be used for this.”

[Interviewer]: “Is this how you got into the K star work?”

[Edmondson]: “And so he said he was sure Vyssotsky would be willing to cooperate with me. So I got in touch with Vyssotsky. He said, “Oh, yes.” He said, “If you can get the telescope time, I’ll send you charts and everything.”

“So I got back to Struve. Then I got busy here — and the money was provided from here.”

[Interviewer]: “Did you start on the 82-inch at McDonald?”

[Edmondson]: “So we started paying, what was it, $600 a year for 15 nights — it’s a lot more expensive than that now!”

As the interviewer points out, this collaborative effort was “the kernel of what we may now call the National Observatory.”

At the time of the interview (1977), Indiana University was still purchasing time at McDonald. These days, IU works jointly with Wisconsin and Yale at the WIYN 3.5m Observatory on Kitt Peak, but I notice that an astronomer from Texas Christian University is using the 2.1m Otto Struve Telescope at McDonald to study open clusters from the WIYN Open Cluster Study. Astronomy—still a team sport.

So, this is a very long introduction to the book I’ve been reading this week, Big and Bright: A History of the McDonald Observatory by David S. Evans and J. Derral Mulholland (1986). It’s interesting enough on its own, as a history book, but this copy is made even more so by the inscription inside the front cover and a letter that was left tucked inside:

Signature, David S. Evans

Author's signature, David S. Evans

The inscription reads: “For Frank Edmondson with many thanks for your help and hoping we got it right—David S. Evans—8th September 1987”

Letter to Frank Edmondson

Letter to Frank Edmondson from Harlan J. Smith

You can click on the image to see a full-size image of the letter. It reads as follows: “Dear Frank:  As you’ve probably heard by now, the long job of researching, writing, editing, rewriting—even a bit of dissention [sic] now and then—finally came to an end with the UT Press publication of the history of McDonald by David Evans and Derral Mulholland. Your long association with the Observatory more than warrants your receiving a copy of this fine book, and you’ll find many friends and memories in it. David has agreed to inscribe a few copies, including yours, making it a bit of collector’s item as well as plain good fun to read. I think you’ll enjoy it. Sincerely, Harlan J. Smith.”

I hope Prof. Edmondson enjoyed the read. I know I will.





Mount Wilson II

25 09 2011
Mount Wilson Observatory

Mount Wilson Observatory

And speaking of Mount Wilson Observatory, it was featured in a souvenir postcard booklet I picked up in the same antique shop in which I found my Jules Vernes classic comic. Founded in 1904 by George Ellery Hale, the observatory now consists of multiple instruments, both historic (Hale’s 60-inch Telescope, for instance) and “cutting edge” (the Berkeley Interferometer and Georgia State University’s CHARA Array). The observatory is located ideally for tourism: 30 miles from Los Angeles, on the summit of Mount Wilson above Pasadena in the San Gabriel Mountains, just an hour drive from the city. Today, the observatory’s public program is focused on a guided tour that includes a visit to the observing floor of the Hooker 100-inch Telescope.

100-inch Telescope

100-inch Telescope, Mount Wilson Observatory

There is also a museum and a cafe on site so you can make a leisurely day of your visit. If you are feeling a need to spend a lot of money, you can organize a group of your friends (up to 25) and spend a night observing with the 60-inch telescope. As of 2011, the fee was $900 for a half-night of viewing, but you should check the fee schedule for the current rates (also, check out the glossy brochure).

The postcard booklet demonstrates the longevity of the tourist industry on the mountain. At the time of the booklet’s publication, the observatory was reached via the Mount Wilson Toll Road (now a hiking trail). While fully one-half of the descriptive text in the booklet described the wonders of the observatory, Mt. Wilson Hotel (first built 1904, no longer extant) was clearly the planned money-maker in this organization. Road tolls, meals and accommodation went to support the Mt. Wilson Toll Road Company—later the Mt. Wilson Hotel Company. Unfortunately, according to Marv Collins’ article at OldRadio.com, neither the toll road nor the resort were good financial investments, eventually going belly up despite public interest in the observatory.

Mount Wilson and Observatory Tourist Description

Mount Wilson and Observatory Tourist Description

As far as visual astronomy is concerned, it seems to me that the hotel and the observatory must have been at odds from the very beginning of their relationship. The first attraction listed for the resort? “Sixty towns illuminated by their own lights at night, a wonderful sight that will live forever in your memory.” Did the astronomers working at the observatory sense they were witnessing what would eventually become the almost global problem of light pollution? Or were they just happy to be able to buy a good meal for Sunday dinner at the hotel?

View of Pasadena

View of Pasadena and Los Angeles from Mt. Wilson





Wallpaper Wednesday

21 09 2011
Mount Wilson and Surrounding Area

Mount Wilson and Surrounding Area. Image Credit: University of Southern California.

Today’s wallpaper isn’t so much a wallpaper as much as it is an excuse to link to a fantastic digital library. I spend a great deal of time poking through the USC Digital Library while prepping lectures (on Greene and Greene, for instance), but it only just occurred to me to look for images of observatories like the one featured above of Mount Wilson Observatory in the snow. The library includes several images from Mount Wilson, including a shot of the 60-inch telescope taken c. 1930 and “Men in Suits Inspecting Telescope Apparata” from the same time period.





Wallpaper Wednesday

14 09 2011
Grail on launchpad

GRAIL on Launchpad. Image credit: NASA/JPL-Caltech/United Launch Alliance, Thom Baur

Download this week’s wallpaper to celebrate the successful launch last Saturday (September 9, 2011) of NASA’s Grail mission to map the effects of lunar gravity. Three and a half months from now, twin Grail spacecraft will be following the same orbital path around the mood. As NASA explains:

“As they fly over areas of greater and lesser gravity, caused both by visible features such as mountains and craters and by masses hidden beneath the lunar surface, they will move slightly toward and away from each other. An instrument aboard each spacecraft will measure the changes in their relative velocity very precisely, and scientists will translate this information into a high-resolution map of the Moon’s gravitational field.”

You can watch the GRAIL pre-launch/launch/post-launch videos on NASA’s Youtube channel.

Wallpaper: NASA’s GRAIL twin spacecraft await launch atop a United Launch Alliance Delta II rocket at Cape Canaveral Air Force Station, Fla.





Frank K. Edmondson

13 09 2011
Frank K. Edmondson

Professor Edmondson at a telescope. Inset with Dr. Caty Pilachowski. Image credit: National Optical Astronomical Observatory News and Reports.

As you can tell from the last few posts, my book collection has grown a bit in the past few weeks, particularly in relation to the history of Harvard Observatory. My partner has been picking up observatory-related books from the local second-hand shop. As it turns out, the books she’s been sorting through were once part of the collection of Frank K. Edmondson, Professor and Chair of Astronomy at Indiana University. Prof. Edmondson did his undergraduate work at IU before earning his Ph.D. from Harvard University, so it’s not unexpected that his library would cover the history of astronomy at either location.

As an undergrad, Edmondson held an assistantship in astronomy, which meant he spent many hours working as a calculator to earn his 25 cents an hour. He was also responsible for opening and managing the Kirkwood Observatory during the weekly public sessions and nightly class meetings. This was on top of his coursework, which was mostly independent study because he was the only astronomy major at IU at the time. He studied almost exclusively under Prof. Wilbur A. Cogshall (see my discussion of the Knightridge Observatory and the Kirkwood Observatory) because, as he stated in an interview conducted in 1977,  “Cogshall was the astronomy department.”[1] The 1919 University Bulletin bears out this statement: all fourteen course offerings were taught by Cogshall.[2]

I’ve commented before on the tangled relationships between astronomers and observatories in the U.S. at the end of the nineteenth-beginning of the twentieth century in the United States. University of Washington had close ties with Lick Observatory; Yerkes, Mount Wilson, Palomar, and Hale Solar observatories were tied together through George Ellery Hale; Alvan Clark & Sons designed refracting lenses for the Cincinnati Observatory Center, Yerkes,  and Lick Observatory; Warner & Swasey Company built the telescopes at the Lick, Kirkwood, Yerkes and University of Illinois observatories; and so on. Edmondson’s description of his student years at IU brings these interconnections to the forefront as well.

When John Miller (director of the Kirkwood Observatory from 1901-06) began to do double star work in Indiana, he brought on board Wilbur Cogshall, who had been working in Flagstaff as an assistant to T.J.J. See on his double star program. Soon after Cogshall’s arrival, V.M. Slipher (an astronomer originally from Mulberry, Indiana, who is credited with discovering rotational motion in spiral nebulae) graduated from IU. Cogshall used his contacts and got him a job at Flagstaff. The next year (1902), C.O. Lampland graduated from IU and headed off to Flagstaff as well, at Cogshall’s recommendation. E.C. Slipher, the astronomer noted for his observations of Mars and V.M.’s younger brother, followed the same pattern: graduate from IU, head to Lowell Observatory in Flagstaff. Edmondson’s interviewer credited Lowell with bringing together a very “interesting” (and productive) group of scientists at Flagstaff, but Edmondson corrected that assumption, noting that “Yes, well, Cogshall — unless Cogshall had been there, Lowell would never have known about Indiana University, or Slipher or Lampland, if Cogshall had not come there.”

[Interviewer]: “I see, so in a way, it was Cogshall who built the observatory, as far as the staff was concerned.”

[Edmondson]: “That’s right. That’s right. — The three members of the staff, really, when I went out there — well, Arthur Adel was there, I guess, and Clyde Tombaugh — but the three senior members, the two Sliphers and Lampland, were all from Indiana. Then Arthur Adel had gone out there to work with Slipher on planetary spectra, and Tombaugh was there, of course. So your senior staff, for a long period of time, were 100 percent Indiana. As you say, Cogshall built the observatory staff, and that’s it.”

Go, Hoosiers!

The oral histories at the Niel Bohr Library and Archives are priceless. I’m looking forward to digging into Edmondson’s transcript more deeply, particularly for the year he was involved with the development of the NRAO and Green Bank as an NSF officer.

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[1] Interview conducted with Edmondson by David DeVorkin in Edmondson’s Office, Swain Hall, Indiana University, 21 April, 1977.

[2] Cogshall had a little bit of help with the teaching. As Edmondson recalls, “K.P. Williams, who was in the mathematics department, taught orbit calculation. Agnes E. Wells, who was dean of women, who had a PhD in astronomy from Michigan, was in the mathematics department, her PhD was in astronomy from Michigan, and she taught history of astronomy. So history of astronomy was Agnes Wells, and orbit calculation was K.P. Williams, and all the rest of the astronomy was Cogshall.”





Wallpaper Wednesday

7 09 2011
Control Room of the Lovell Telescope

Control Room of the Lovell Telescope. Photo credit: Anthony Holloway, Jodrell Bank

In a slightly delayed celebration of Bernard Lovell’s 98th birthday, today’s wallpaper gives us an inside (literally) look at the 76-meter Lovell Telescope at Jodrell Bank.





Harvard Observatory II

6 09 2011
Harvard Observatory

Harvard College Observatory. Photo from George C. Comstock, A Text-Book of Astronomy, 1903.

After reading my last post on Harvard Observatory, my partner gave me a follow-up birthday present, The Harvard College Observatory: The First Four Directorships, 1839-1919, by Bessie Zaban Jones and Lyle Gifford Boyd (1971). It covers a time period slightly too early to include Jenka Mohr’s most active years at the observatory, but it does include a photo of December 31, 1929, performance of “The Observatory Pinafore,” for which she played the violin. Notice the fantastic image of Saturn on the back wall:

Harvard Pinafore 1929

Harvard Pinafore, December 31, 1929. L to R: "Prof. Rogers" (Percy M. Milliman); "Josephine" (Cecila H. Payne): "Lady computers" (Henrietta Swope, Mildred Shapley, Helen B. Sawyer, Sylvia Mussels, Adelaide Ames); "Prof. Searle" (Leon Campbell, Sr. )

At any rate, I’m slowly making my way through the book. First, I had to study the 57 illustrations. After that, I skimmed Chapter XI, “A Field for Women,” hoping to find some trace of Mohr’s earliest days at the observatory (her name wasn’t mentioned). Now I’m starting from the beginning, Chapter I, “Before the Observatory.”

I mention this because this chapter brought me to an intellectual halt on its first page. My own research focuses on the eighteenth century and really has nothing to do with American observatories—my last two projects dealt with India and England, with occasional forays into France, Austria, Bavaria and Portugal. Which is to say, I don’t spend a lot of time thinking about the direction taken by American astronomy during the seventeenth century. Honestly, it never occurred to me that there was a point at which the American astronomy curriculum switched from a Ptolemaic worldview to a Copernican. In my mind, that was something that happened in Europe (and for my work, India),  well before a firm university tradition was established in North America.

But as early as 1642, the “Laws, Liberties and Orders of Harvard College” were offering astronomy as part of the curriculum. By 1659, Harvard was leaning fairly strongly toward the Copernican system, as evidenced by the explanation of it in the New England Almanac, written by the Harvard graduate, Zechariah Brigden. Spending so much intellectual time in the Euro-Asian eighteenth century has caused me not only to forget how early Harvard was established (1636), but also that, despite a decided emphasis on Puritan learning and ideals, it had strong ties to Cambridge University and its tradition of scientific education.

And speaking of Copernicus, I have just started reading an advance copy of Dava Sobel’s A More Perfect Heaven:  How Copernicus Revolutionized the Cosmos (out next month in the U.S.). I’ll let you know my take on the embedded play after I finish the book.





Happy Birthday!

31 08 2011
Sir Bernard Lovell

Sir Bernard Lovell. Photo Credit: Jodrell Bank Centre for Astrophysics, University of Manchester

Happy 98th Birthday to Sir Bernard Lovell, founder of Jodrell Bank Observatory!





Wallpaper Wednesday

31 08 2011
CTIO Blanco 4m

CTIO Blanco 4-meter telescope, 2007. Photo courtesy: T. Abbott and NOAO/AURA/NSF

Today’s wallpaper shows the Blanco 4-meter telescope at the Cerro Tololo Inter-American Observatory in Chile. I retrieved this image from the National Optical Astronomy Observatory’s image bank (click on the image for more wallpaper sizes). You know what else they have on offer? A great collection of astronomy-themed wallpapers for your iPhone.





Harvard College Observatory

28 08 2011

Harvard University

One of the most interesting birthday presents I received this year was a booklet published in 1932 called A Brief Account of the Harvard Observatory. Before I even read the first full page of the book, I found myself on a chase through archives, intent on drawing out a more feminist history on its author, a research assistant named Jenka Mohr. Mohr was a frequent collaborator with and the principal assistant to the director of the observatory, Howard Shapley.[1] Biographical details for Mohr are hard to find, but while she worked at Harvard, she gave lectures on topics such as Beyond the Milky Way and The Magellanic Clouds: Our Neighboring Galaxies. She published at least one article as first author and a few as second and third author.[2] She served as the editor to the THE TELESCOPE—An Illustrated Magazine of Astronomy, published bi-monthly by the Bond Astronomical Club at the Harvard Observatory.[3] She also played the violin well enough to entertain her colleagues.[4] Mohr’s tenure at Harvard slightly postdates the era of the Harvard Computers (see George Johnson’s book, Miss Leavitt’s Stars: The Untold Story of the Woman Who Discovered How to Measure the Universe), but her workload seems to compare well with some of the assignments given to that cohort of women. For example, in addition to her more science-based duties at the observatory, she was charged with quite a bit of bibliographic work by the senior astronomers.[4]

Frontispiece, A Brief Account of the Harvard Observatory

There’s a longer story in Jenka Mohr’s career, I’m sure, and perhaps one day I’ll detail it on this website. In the meantime, you might notice the second distraction on the title page of the booklet, reproduced above. How often do you see a telescope poking upward through a second-story window? According to Mohr, this image depicted the 12″ “polar equatorial” telescope, installed in the observatory c. 1907. The telescope, with its axis parallel to that of Earth, is fixed in position on the south side of the observatory. The observer, sitting comfortably inside the building, looks through the eyepiece in the direction of the South Pole. The images of the stars are brought into the field of vision not by moving the telescope, but by moving a 12″ mirror installed in the instrument after the dismantlement of a horizontal photometer.[5]

The American Astronomer

"A New Polar Equatorial," from The American Astronomer, Vol. 1, No. 3, June 15,1907, p. 11

The entire southern sky could be viewed from a comfortable chair inside the observatory. According to both Bailey and Mohr, the telescope was used primarily for the observation of variable stars.

That’s the cover page of the book. Imagine what I will have to write about the history of the Harvard College Observatory if I ever make it beyond the opening pages.

###

 [1] See “Interview with Leo Goldberg by Owen Gingerich in Gingerich’s Office, Harvard University, August 9, 1983.” [http://www.aip.org/history/ohilist/28196_1.html] Goldberg is somewhat dismissive of her skills (calling her Shapley’s “Girl Friday,” for instance), but Mohr’s publications suggest that she knew what she was doing when working as an astronomer. In 1938, she served on the committee on nebulae and star clusters at the annual meeting of the International Astronomical Union in Stockholm, Sweden.

[2] Jenka Mohr and Harlow Shapley, “A comparison of the magnitude sequences in the two magellanic clouds,” Annals of the Astronomical Observatory of Harvard College, Vol. 105, No. 11, Cambridge, Mass. : The Observatory, 1937, p. 237-240; Harlow Shapley and Jenka Mohr, “Summary of a Variable Star Survey in an External Galaxy“, Proceedings of the National Academy of Sciences of the United States of America, Vol. 19, No. 12 (Dec. 15, 1933), pp. 995-996; Harlow Shapley, Virginia McKibben and Jenka Mohr, “Galactic and Extragalactic Studies, VII. Magnitudes of Forty Cepheids in the Large Magellanic Cloud,” Proceedings of the National Academy of Sciences of the United States of America, Vol. 26, No. 5 (May 15, 1940), pp. 326-332.

[3] See Star Fields, the Newsletter of the Amateur Telescope Makers of Boston Including the Bond Astronomical Club, Vol. 2, No. 2, Feb. 2001, p. 3.

[4] Jenka Mohr, Bibliographies of Edward Charles Pickering, 1846-1919 and Solon Irving Bailey, 1854-1931 Wash. D.C.: National Academy of Sciences, 1932; Annie Jump Cannon and Jenka Mohr, Biographical Memoir of Solon Irving Bailey, 1854-1931, Washington: National Academy of Sciences, 1932.

[5] Solon I. Bailey, The History and Work of Harvard Observatory, 1839 to 1927, New York: McGraw-Hill, 1931, p. 45.








Observatories and Instruments