13 April 2011 (posted the next day). It was a long, hard day today. I had wanted to get a really early start, but ended up not getting off until 7:45—though that wasn’t too long after sunrise. For the first 39 miles, I was heading due east along Interstate 10—the first half of that on a nice frontage road, the second half on the Interstate shoulder. There was supposed to be a strong tailwind all day and it started out that way, but then, inexplicably, the wind shifted to a modest headwind for about 20 miles. (The wind makes such a difference!)
After I reached Kent, I turned south and followed Route 118, which passes through the Davis Mountains and up to the McDonald Observatory. That was another 39 miles, most of it uphill, with climbing of about 2,500 feet. Route 118 was gorgeous and almost totally free of traffic. I think only about 20 vehicles passed me all afternoon—one a nice couple who said they were also bicyclists and asked if I needed anything. I regretted for about ten miles not taking them up on that, at least for the chance to chat a bit!
With the turn south, the wind was mostly from the side (west), though I think it continued to be a net benefit to me, overall. There were plenty of times when I was pedaling into a headwind on the twisting road, but more of the time I had a tailwind. So I can’t complain about wind.
But the climb was hard for me. Relative to my original goal for the bike trip—time to quietly reflect on where green building needs to go, the focus of a writing project for the rest of my sabbatical, etc.—I find I’m not really doing that. I think more about my knees, the miles of covered, how many miles there are to go, how steep the next hill will be, and when I should take another dose of ibuprofen.
I’ve also heard that in getting over the Davis Mountains, I’ll have completed the most beautiful parts of this Southern Tier ride. So I’m at a decision point. Through yesterday, I’ve covered 1,100 miles in three weeks. I’m about 250 miles from Del Rio; I might put my bike (and self) on an Amtrak train there and head back to the real world.
So anyway, after 78 miles from Van Horn, I got to the McDonald Observatory and found John and Deb’s house here.
After a quick shower, Deb gave me a ride up to John’s office in the building housing the 107-inch Harlan J. Smith Telescope, which was built in 1966-68 and was the world’s third-largest telescope when completed (it’s now #39). John Kuehne is a computer whiz who keeps all of the software and control systems on that and an older telescope working. With a Ph.D., he’s over-trained for the work, but a brilliant trouble-shooter. After finishing up a few things, he gave me a tour of both the 107-inch and 82-inch telescopes.
When the older Otto Struve 82-inch telescope, completed in 1939, wasn’t tracking properly and nobody was doing anything about it (making it virtually unusable), he spent a couple weeks writing new code and getting it in better shape than ever. He’s now meticulously cleaning the brass teeth on the worm drive that moves the telescope. I watched him do that work for about an hour—though two thirds of that time was lengthy discourses on the history of theories about plate tectonics and how unwilling the geology establishment was to accept that radical new theory (from the 1930s until the 1970s, when it was finally accepted as settled science.) Don’s Ph.D. is in geology.
We toured both the 107-inch and 82-inch telescopes and got into a length conversation with UT Austin professor Don Winget, who was calibrating the 82-inch scope in preparation for measurements of pulsars later that evening—if the cloud cover cleared adequately. We talked about an exciting pulsar (rapidly rotating neutron star) that he and John discovered recently—with a rotation frequency of just 12 minutes! Don showed me the screen captures showing the feature, though I wasn’t quite up-to-speed enough to follow precisely. John didn’t let me take flash photos in either of the two telescopes because scientists could be working on them, but Don let me do so in the 82-incher, since he was the scientist working on it that night.
We went in, turned on the lights, and he invited me to climb the steep stairs to look at it from the top—down into the mirror! I watched as the protective cover was opened. Then I got to use the joystick to adjust the altitude of the telescope to where it was needed for some calibration Don was carrying out. It was awesome. I have always wanted to visit an observatory, and I got the royal tour from these pros! Don has been teaching astronomy at UT Austin for 30 years and has been doing research all that time on the McDonald telescopes, coming here for a few days or weeks at a time.
At one point we got into a conversation about the fixes that had to be made to the Hubbell Space Telescope. Both Don and John let out an audible sigh of disappointment about Hubble. Don said that any amateur astronomer who has made a telescope, as he did as a kid, knows about the knife-edge test (or something like that) that the experts making the Hubble overlooked. As a result a serious flaw dramatically reduced its effectiveness—though a fix was later added that recovered some of the lost resolution.
Don also noted that it was a case of politicians trying to decide how best to spend money on space exploration without asking astronomers. He said that for what was spent on Hubble, every professional astronomer in the world could have been given a 4-meter (160-inch) telescope! (I asked: there are about 4,000 astronomers, worldwide.)
John related a fascinating bit of history about the 107-inch Harlan Smith Telescope. Back in 1970 a disgruntled worker came in with a gun and ordered the telescope brought down to level. From his revolver, he fired six rounds at the glass mirror, hoping to shatter it. When that failed, he shifted to Plan B and walked into the telescope tube with a sledge hammer and wailed on the mirror. The foot-thick glass of the mirror was chipped a bit, but the net effect was reducing the effective aperture from 107 inches down to 106 inches. Apparently, because it’s a reflector telescope, a few imperfections have relatively little effect.
We came down the hill to John’s house around 8 pm I think, stopping to take a few sunset photos from the top first and looking around at the areas where smoke was still rising from remaining fires in the area.
Tomorrow, I’m planning a rest day here at the McDonald Observatory. The predicted 40- to 50-mph winds are a factor in that decision, but I also want to rest up—and catch up on my writing/processing.