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Visual Observing


Clear Sky Chart
Here are hyperlinks to many websites that can help you forecast the astronomical observing conditions for next few nights — or longer.

Have you ever felt that you ought to be able to see more in the night sky using just your unaided eyes? You may need nothing more than a new pair of eyeglasses.

Light pollution is most amateur astronomers' worst enemy. Learn here how to measure and describe how brightly your sky glows.

Orion
S&T contributing editor Fred Schaaf takes a new approach to an old subjecty by describing the 50 best astronomical sights of any kind, from naked-eye spectacles to objects that can only be seen through telescopes at high magnification.

chained telescope
Telescope tinkering can be fun and rewarding.

Galileo
When Galileo Galilei first turned a telescope to the heavens four centuries ago, he discovered amazing things — and you can follow in his footsteps.

Just a couple hours spent learning to read a star map can open up the heavens for a lifetime of exploration.

Autostar control: Calibrate Motors
Tips to ensure trouble-free slewing for Go To telescopes

Gemini on Sky Atlas 2000.0
The essentials of navigating the heavens with a telescope and a star atlas.

foam-pad dew shield
How to keep your optics dry and clear even on the dampest, dewiest nights.

Binocular exit pupils
They come in a wide range of apertures. But for astronomy, large aperture is only part of the story. High magnification is just as important when binoculars are used on a night sky that's not absolutely dark.

Binocular users
All you need to enjoy the wonders of the night sky is a pair of binoculars.

small secondary
Here are some plausible-sounding ideas that turn out to be less than true.

Holding a planisphere
How do you find out what stars are visible tonight? With a planisphere or "star wheel." It's easy!

click here for animation
Beginners should ignore them and learn to navigate the sky by eyeball instead. However, setting circles do have their uses -- if you make all the right adjustments first.

Here are links to some websites that can help you predict where and when you'll get good transparency for deep-sky observing.

Even when the air is perfectly clear, a significant fraction of starlight is lost in the atmosphere. And when there's a lot of haze or your target is close to the horizon, atmospheric extinction is a major problem.



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