Download e-book for kindle: Astronomy Hacks: Tips & Tools for Observing the Night Sky by Robert Bruce Thompson, Barbara Fritchman Thompson

By Robert Bruce Thompson, Barbara Fritchman Thompson

Why use the conventional method of examine the celebs if you happen to can flip pcs, hand-held units, and telescopes into out-of-this-world stargazing instruments? even if you're a primary timer or a sophisticated hobbyist, you'll locate Astronomy Hacks either invaluable and enjoyable. From upgrading your optical finder to photographing stars, this ebook is the suitable cosmic companion.

This convenient box advisor covers the fundamentals of gazing, and what you want to find out about tweaking, tuning, adjusting, and tricking out a 'scope. count on worthwhile tips and instruments for utilizing a Dobsonian Telescope, the large-aperture telescope you could inexpensively construct on your storage. Get recommendation on protocols concerned with utilizing electronics together with in darkish areas with no ruining the party.

Astronomy Hacks starts off the distance exploration by means of getting you put up with the ideal gear for staring at and admiring the celebrities in an city environment. alongside for the journey are good information for making such a lot of observations. The hacks convey you ways to:

* Dark-Adapt Your laptop Computer
* pick out the easiest Binocular
* fresh Your Eyepieces and Lenses Safely
* improve Your Optical Finder
* picture the celebrities with easy Equipment

The O'Reilly Hacks sequence has reclaimed the time period "hacking" to intend innovating, unearthing, and developing shortcuts, gizmos, and gears. With those hacks, you don't dream it-you do it--and Astronomy Hacks brings house desires to existence. The ebook is vital for somebody who desires to get the main out of a night less than the celebs and feature memorable celestial adventures.

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Extra resources for Astronomy Hacks: Tips & Tools for Observing the Night Sky

Example text

Coatings A typical binocular has from 6 to 10 lenses and prisms in the optical path between the object you are observing and your eye. Each of those optical elements has at least two surfaces, and each surface reflects a small percentage of the light rather than transmitting 100% of the light that strikes it. An uncoated surface may reflect as much as 4% of the light that strikes it, which doesn’t sound excessive until you run the numbers. 442. 2% of the light that strikes its objective lens. 8% of the incident light is reflected and scattered, which reduces both brightness and contrast dramatically.

If you use a propane or other heater at an observing site, remember that it produces a heat plume that roils the air over it and interferes with observing. Before you set up your heater, talk to other observers present and verify that where you plan to put the heater won’t interfere with someone else’s observing. 14 | Chapter 1, Getting Started HACK Don’t Violate Observing Site Etiquette Figure 1-2. Robert warming himself with our catalytic propane heater H A C K #5 Don’t Violate Observing Site Etiquette Hack #5 Rules exist for good reasons.

Cheap Porro prisms are made from inferior BK-7 borosilicate flint glass. Better Porro prisms are made from superior BaK-4 barium crown glass. Although nearly any binocular that uses BaK-4 prisms advertises that fact, it’s easy enough to check for yourself. Simply hold the binocular with the eyepieces several inches from your eyes, pointing at the sky or another evenly lit light source, and look at the exit pupils. If the prisms are of BaK-4 glass, the exit pupils are round and evenly illuminated.

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Astronomy Hacks: Tips & Tools for Observing the Night Sky by Robert Bruce Thompson, Barbara Fritchman Thompson


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