Cassegrain Focus
Images showing the mirror cell of a Cassegrain focus instrument.
Telescope World – 12.5 inch Newtonian
This is a 1979 to 1986 Vintage 12.5 inch F 4.5 reflector built by Telescope World. The main optical tube is made from Duralite – a composite material with excellent thermal and structural properties and painted with Dupont Imron paint. This combination gives impressive strength and durability to house the optics. The spider is made …
Mars Opposition 2020
On Oct 13, 2020 the red planet reached opposition, being just visible after sunset low in the south-eastern sky. This is a favorable one, with Mars being at its closest on October 6 of 38,569, 224 miles, achieving a maximum diameter of 22.56 arc-seconds. The above image was captured with a CPC 11 Celestron using …
The Binary Stars – 1918 Robert G. Aitken – California Edition
This edition is in remarkable condition for being 100 years old. The covers are beautiful in a vivid blue color. The pages are in mint shape with no yellowing and it is a prime example of a meticulous cared for book. The California edition was printed in special low quantities for distribution within educational institutions …
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The Binary Stars – 1918 Robert G. Aitken – California Edition
Here’s a great early edition of “The Binary Stars” by Robert Grant Aitken 1918. To make matters even more exciting it is a very rare special California Edition. This edition is in remarkable condition for being 100 years old. The covers are beautiful in color, the book is nearly perfect. This is a very fine …
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Jupiter – now has 79 Moons
Twelve new moons have been discovered orbiting Jupiter, raising the number of natural satellites known to be circling our solar system’s biggest planet to 79. One of the newfound moons, provisionally named “Valetudo” for the Roman goddess of health and hygiene and the great-granddaughter of the god Jupiter, is being called an oddball because it orbits …
Mars July 4, 2018 – Dust Storm
Mars – July 4, 2018. A planet-wide dust storm currently rages on the surface of the red planet obscuring precious detail. I captured this image just before dawn from my home in Bethel Park, PA. ASI 224 camera. Too much turbulence for a barlow lens.
Bright New Comet Promises Skywatching Treat in 2013
by Joe Rao, SPACE.com Skywatching Columnist Date: 30 March 2012 Time: 01:15 PM ET Discovery image of the newfound comet C/2011 L4 (PANSTARRS), taken by Hawaii’s Pan-STARRS 1 telescope. CREDIT: Institute for Astronomy/University of Hawaii/Pan-STARRS View full size image A year from now, it is possible that “comet fever” will be running high when a …
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Archimedes to Plato
Here is a very beautiful area captured during the last quarter moon We can see the prominent crater Archimedes on the left with the mountains surrounding it, To the right the crater Plato is conspicuous, nestled within Montes Alpes. Note the craterlets within Plato and the Alpine Valley nearby. Image by – Al Paslow.