Declination Drift: An Explanation
- Last Updated on 14 July 2014
By David Nakamoto
For any true equatorial mount you need to align the polar axis with the earth’s rotational axis to track objects. For visual use, simply aligning this axis with Polaris is sufficient for even high magnifications on the planets. Most telescopes aren’t capable of magnifications beyond 20x to 30x per inch of aperture due to optical quality and alignment, and most of the time the atmosphere isn’t steady enough to allow for higher magnifications.
The LAAS History Detective - Episode 5
- Last Updated on 07 December 2013
by Lewis Chilton
Laying the Groundwork for the LAAS - Amateur Astronomers Past – Part 2
(Unless otherwise noted, much of the material presented here and in Episode 4 is based on an article by Dr. Mars F. Baumgardt, titled “Amateurs and Telescopes of Early Southern California.” It was published in the March 1940 Griffith Observer magazine, Vol. 4, No. 3, pp. 26-38, and is used with permission.)
Let’s continue where we left off in Episode 4 and go back to the 19th and early 20th centuries to learn about other early Los Angeles amateur astronomers. Many of them were the movers and shakers of Los Angeles, did much to popularize the science of astronomy and contributed a great deal to the growth and development of the city, the region and the state.