Astronomy for Dummies, 4th Edition (Maran) by Astronomy For Dummies 4th Edition c2017

Author:Astronomy For Dummies 4th Edition c2017
Language: eng
Format: epub
ISBN: 9781119374381
Publisher: Wiley
Published: 0101-01-01T00:00:00+00:00

Viewing the Outer Planets

With experience, you can locate the outer planets Uranus and Neptune, but tiny Pluto may be beyond your visual reach. The first time you look for any of these distant objects, seek the aid of a more experienced amateur astronomer unless you have a telescope with computerized pointing. (I recommend such telescopes in Chapter 3.) Even then, you will be better off with a little help from your friends.

Sighting Uranus

Uranus was discovered with a telescope, and it sometimes shines bright enough to be barely visible to the eye under excellent viewing conditions. When you become an experienced observer, you’ll probably be able to spot it with binoculars. Through your telescope, you can distinguish Uranus from a star, thanks to

Its small disk, a few seconds of arc in diameter (defined in Chapter 6)

Its slow motion across the background of faint stars

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