Wallpaper Wednesday

8 06 2011
James Webb Telescope Wallpaper

James Webb Space Telescope Wallpaper

Okay, I admit this isn’t the most stunning wallpaper but the James Webb Space Telescope (JWST) is on my mind today since NPR played their story on the cost of the instrument over and over and over this a.m.

As the wallpaper suggests, the JWST is going to be searching for the earliest galaxies, observing the formation of stars from the earliest stages to the development of planetary systems, and looking for signs of life in planetary systems. The telescope is designed to make its observations in the infrared (with limited capability for observations in the visible range of the spectrum) and will carry four separate instruments to do so: the Near InfraRed Camera (NIRCam), the Near InfraRed Spectrograph (NIRSpec), the Mid-InfraRed Instrument (MIRI), and the Fine Guidance Sensor Tunable Filter Camera (FGS-TFI). We already make infrared observations from Earth-based telescopes (at the Keck and Mauna Kea Observatories in Hawaii, for instance), but even at those high altitudes, the earth’s atmosphere can cause blurring. Thus, the need for a telescope outside our atmosphere, 1.5 million km outside our atmosphere, in this case.

To get the wallpaper, click the image and scroll down the downloads page. To get instructions for building a paper model of the telescope, visit the model page. To follow the telescope on twitter, look for @NASAWebbTelescp.





Lick Observatory

6 06 2011

Mail call!

This morning, I received this lovely card in my post office box. Postmarked July 2, 1946, the image shows the view looking west across town. (Click on images for high res.)

Lick Observatory, Mt. Hamilton, California.

Lick Observatory, Mt. Hamilton, California.

The note on the back reads, “Expect to be transferred out this way so we are out to look the place over. Nothing settled as yet. Back to Chi. in a couple of weeks. Climate here doing us lots of good. Gladys.”

Back of postcard, Lick Observatory.

Back of postcard, Lick Observatory.





University of Illinois

4 06 2011
Observatory, Small Observatory, and Auditorium, University of Illinois.

Observatory, Small Observatory, and Auditorium, University of Illinois. Photo credit: University of Illinois Archives.

If you’ve been looking for the online version of the excellent National Historic Landmark Theme Study on Astronomy and Astrophysics by the National Parks Service, you should know that most of the NPS links to the title page are broken. You can find the portal to the e-book at http://www.nps.gov/history/history/online_books/butowsky5/astro.htm (not at /butowsky/index.htm as the failed links would have you believe). The book is rather dated (1989), and the information included in it is most comprehensive for the observatories and instruments that have been nominated for National Historic Landmark status, but even the briefer entries are useful for dates and locations. I was happy to read the nomination entry for the observatory of my alma mater, designed by architect Charles A. Gunn in 1896.

University of Illinois Observatory.

University of Illinois Observatory. Photo credit: University of Illinois Archives.

It took me a bit of effort to track down Mr. Gunn, but according to the 1914 Alumni Record of University of Illinois, he was born in Chicago in 1870. He appears to have been a very well-rounded individual:  at university, he was in Adelphic, Sigma Chi, and Glee Club. He was Captain of his class baseball team, played varsity baseball, held the state and conference record for the ball throw, as well as the Hop, Step, and Jump, and broke the university record for the running broad jump in 1890.

Charles A. Gunn, 1913 Alumni Record, University of Illinois.

Charles A. Gunn, Entry from 1913 Alumni Record, University of Illinois.

It would seem Gunn designed the observatory as one of his last projects in Illinois, as he was recorded as working in New York between 1897 and 1903 (first as Assistant Architect at Columbia University, second as a solo act).

Charles Gunn, Semi-Centennial Alumni Record of University of Illinois, 1918.

Charles Gunn, Entry from Semi-Centennial Alumni Record of University of Illinois, 1918.

I’m not quite sure when Mr. Gunn got religion, but two of his children died young, in 1905 and 1907, so maybe he sought solace in the church after those events. At any rate, The Eighty-Second Annual Report of the Board of Foreign Missionaries of the Presbyterian Church of the USA (1919) notes that Mr. and Mrs. Gunn had returned to the Manila Station on the island of Luzon with the Philippine Mission after furlough.

Eighty-second Annual Report, Foreign Missions, Presbyterian Church USA.

Eighty-second Annual Report, Foreign Missions, Presbyterian Church USA.

Eighty-Second Annual Report, Presbyterian Church USA.

Eighty-Second Annual Report, Presbyterian Church USA.

But when did the Gunn family returned to mainland U.S.? Mr. Gunn continued to work in the Philippines, South China and Hainan from 1916 to 1921, after which point he worked in Shanghai until 1939 (see, for instance, the Missions Building, 169 Yuanmingyuan Road). He made the national U.S. press when hostilities between China and Japan came to a head in 1937 (“Daughter Fears for Parents in Peiping Mission,” Chicago Daily Tribune, July 31, 1937; “Charles A. Gunn.” New York Times, Oct. 20, 1945), but I haven’t been able find any trace of him after that year. It would seem, however, that the observatory was a one-off, and his true calling was in the architecture of religion, not science.

University of Illinois Observatory.

University of Illinois Observatory. Photo credit: University of Illinois Archives.

For more information on the observatory, including plans to restore the space, check out the Facebook group, Friends of the University of Illinois Observatory (thanks, Mike!).





Wallpaper Wednesday

1 06 2011

Australia Compact Telescope Array at Night.

Australia Compact Telescope Array at Night. Photo credit: S. Amy, CSIRO


Obviously, I have a thing for the architecture of radio astronomy.  I blame my appreciation for the dish on COMSAT first, NRAO second, and only those who grew up in the Okanogan know why (unless you followed the links in this sentence). The image above shows four of the six 22-m antennae that comprise the Australia Compact Telescope Array at the Paul Wild Observatory near Narrabri, NSW, Australia. My favorite part of the observatory’s website is the ATCA Live! page, which tells me what the array is currently tracking (“As you read this astronomers are observing the source HD135344AB which has an azimuth of 247.3 degrees and an elevation of 60.1 degrees. The telescope is setup to observe at 17000 and 19000 MHz simultaneously.”). There’s also a nice archive of construction and upgrade photos available for public viewing online. I can’t see finding myself in Narrabri Shire anytime soon, but if you’re in the neighborhood (500 km northwest of Sydney), hit the Visitors Center:  always open, admission is free.