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January 19, 2014
Spaced-Out Challenge: John Dobson (1915-2014)[We Politely Request That All Off-Topic or Political Comments Be Directed to the Overnight Open Thread Coming Shortly Above This One, or the Open Thread down page, Which Will Serve Officially as the Current "Active Conversation" Thread for All Discussions Not Related To This Topic.] ![]() is not in how big it is, it's not in how well made it is, it is how many people, less fortunate than you, got to look through it." -John Dobson Welcome to this week's edition of the Spaced-Out Challenge. There are no targets this week. Instead, it's dedicated to the life of a man who dramatically impacted astronomy with a simple idea he refused out of his personal philosophy to patent. If you want a more biographical write up on Dobson, check out the L. A. Time's wonderful obituary here. I'm going to skip over his unorthodox cosmological theory, and focus here on the "before and after" impact he had. It was, to put it mildly, profound. ![]() Edmund's "top of the line" 8" reflector was considered a monster for it's time, and the price- $389 (over $2600 in today's dollars) was too. Throw in the mount and shipping, and you're shelling out over $4k in today's money. The reflector also weighed over 200 pounds, so "portability" wasn't exactly a strong selling point. Many people in the amateur community were discouraged from using instruments approaching this size, and few considered building the 12, 16, 24, and 30+" scopes that dominate star parties today. ![]() ![]() ![]() The prevailing wisdom before Dobson insinuated that heavy mirrors and heavy mounts were just a "fact of life" for larger scopes. While many innovators since Dobson improved his very basic design, that "bigger = exponentially heavier" mindset was permanently changed, allowing for not only larger homemade telescopes, but mass-produced monsters: Obsession and Webster telescopes sell apertures greater than the 24" giant the SFSA took to the Riverside Telescope Maker's Conference in the late 1970s, and Orion just released a computer-controlled 16" dobsonian for less than $4000 in 2013. Ray Cash has as close to the original "perfected" Dob plans as you can find for free online for constructing a 6, 8, or 10" telescope here. John Dobson and the Sidewalk Astronomers showed tens of thousands of city dwellers a view they'll never forget, promoting the heavens above in a time in which light pollution seems to have alienated the bulk of us from our sky. They have announced this year's International Sidewalk Astronomy Night (March 8th) will be dedicated in memory of John and in continuing his work. Everyone should have the opportunity to know where they truly are. This was the driving goal of Dobson, and he took an incalculably big step in making that a reality. RIP. The Sidewalk Astronomer's Webpage can be found here. The full Beginner's Buyer's Guide, our Comet Guide (featuring additional grab-and-go telescopes), and any other edition you're looking for can be found in the master index of all Spaced-Out Challenge threads here, but of course you can always inquire about binoculars, telescopes, and all the rest in the comments. As always, if you have astrophotography, product recommendations, or astronomy news you'd like to see on a future Spaced-Out Challenge, email me at theoneandonlyfinn (at) gmail.com, or tweet me @conartcritic. Until next week, clear skies to you, keep looking up, and those of you blessed to have a telescope, please: share the view. | Recent Comments
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Hobby Thread - Sept 7, 2024 [TRex]
Ace of Spades Pet Thread, September 7 Gardening, Puttering and Adventure Thread, Sept. 7 The "rules-based international order" vs. free speech? The Classical Saturday Morning Coffee Break & Prayer Revival Daily Tech News 7 September 2024 The Bric, The Brac, The Craic & All, Lets Call It An ONT TGIF Cafe The Week In Woke Dick Cheney Is Voting for Kamala Harris Search
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