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2. Dobsonian telescope - Wikipedia

   en.wikipedia.org/wiki/Dobsonian_telescope

   A Dobsonian telescope on display at Stellafane in the early 1980s. A Dobsonian telescope is an altazimuth-mounted Newtonian telescope design popularized by John Dobson in 1965 and credited with vastly increasing the size of telescopes available to amateur astronomers. Dobson's telescopes featured a simplified mechanical design that was easy to ...

3. John Dobson (amateur astronomer) - Wikipedia

   en.wikipedia.org/wiki/John_Dobson_(amateur...

   The 24-inch (610 mm) Dobsonian telescope brought by the Sidewalk Astronomers was unconventional, because most telescopes at such meetings tended to be smaller, on equatorial mounts, and designed for astrophotography rather than optical viewing. Surprisingly (and controversially at the time) Dobson's telescope tied in first prize for best optics.

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5. Account Management - AOL Help

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   If you're having issues sending and receiving emails for your AOL Mail account in a third-party email application, you may need to reauthenticate your account by removing and re-entering your password or removing and re-adding your AOL Mail account. Get the steps for common third-party email applications. Account Management · Dec 9, 2024

6. List of telescope types - Wikipedia

   en.wikipedia.org/wiki/List_of_telescope_types

   Some telescopes are classified by the task they perform; for example Solar telescopes are all designs that look at the Sun, Dobsonian telescopes are designed to be low cost and portable, Aerial telescopes overcame the optical shortcomings of 17th-century objective lenses, [1] etc.

7. View your AOL billing statement online

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   2. In the left navigation menu, click My Wallet | select View My Bill. - The Billing Statement page will appear. 3. From the dropdown menu, select the time period you want to view. Note - You can print your statement by clicking on the Print Statement button.

8. Obsession Telescopes - Wikipedia

   en.wikipedia.org/wiki/Obsession_Telescopes

   Obsession Telescopes is an American optical telescope company that specializes in the production of Dobsonian telescopes. [1] The company was founded in 1989 by David Kriege, and is based in Lake Mills, Wisconsin [ 2 ] and operates globally.

9. Sidewalk astronomy - Wikipedia

   en.wikipedia.org/wiki/Sidewalk_astronomy

   Some sidewalk "pitch men" charged the public to view astronomical objects through their telescope but other astronomers allow people to view for free. [ 6 ] [ 10 ] In more recent years sidewalk astronomy has come to be more associated with altruistic individuals or groups offering views of the nighttime sky as a free public educational service.