Telescopes are specialist optical instruments that have been around for over 400 years and are useful for many applications including seafaring, military operations and especially stargazing. But not ...

The Ceravolo 300 Astrograph is an 11.8-inch (300 mm) aperture Dall-Kirkham Cassegrain reflector telescope. Its construction incorporates a carbon-fiber tube, a fused-quartz primary mirror, and an ...

Astronomy magazine's April 2004 issue featured a review of Konus U.S.A. Corp.'s Motormax-130 HM, a 5.1-inch (130mm) f/15.4 Maksutov Cassegrain telescope. The telescope boasts a 2000mm focal length, ...

Telescopes gather and focus light using precisely-shaped mirrors and lenses (or a combination of both). The larger the telescope’s main mirror or lens, the more light is gathered and the more detail ...

Holiday shopping season has really kicked into gear, and if you have a stargazing fan on your gift list, you have a lot of choices. I think the best thing to do is buy online from one of the major ...

If this is the easy part of making a complete reflector telescope from a single piece of glass, we can’t wait to get a load of the hard part! A little backstory may be in order for those who don’t ...

I'm often asked to recommend a telescope, especially around the holidays, when gift-giving is on our minds. Today I'll share a few suggestions, but before we talk specifics, let's look at the ...

Over the years of writing this column and putting on astronomy and stargazing presentations, I’ve received inquiries from many nice folks about purchasing a telescope for themselves or that special ...

Dual reflector antennas are considered as pencil beam antennas that can produce radiation identical to searchlight. Cassegrain Reflector Antenna Design consists of various effects caused by blockage ...

CASSEGRAIN AND GREGORIAN REFLECTORS.—For some time past, Prof. Schaeberle, of the Lick Observatory, has been experimenting on the applications of these rather neglected forms of reflecting telescopes ...

How to capture images of nebulae, galaxies, star clusters. Deep-sky photography involves capturing images of nebulae, galaxies and star clusters, which are too small and distant to see with normal ...