The Practical Astronomer : Explore the wonders of the night - download pdf or read online

By DK Publishing

ISBN-10: 0756662109

ISBN-13: 9780756662103

For an individual who's ever checked out the evening sky and desired to understand extra in regards to the galaxy round them, The functional Astronomer exhibits readers easy methods to notice and comprehend the mysteries of the sun procedure and past. Illustrated all through with special images and illustrations, and utilizing transparent, easy-to-follow textual content, The sensible Astronomer takes you on a step by step trip from the fundamentals of what could be obvious with the bare eye, to how one can view extra far away gadgets comparable to the planets of the sun approach, or even galaxies a long way, a ways away-all on your personal yard.

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Extra info for The Practical Astronomer : Explore the wonders of the night sky

Example text

50 OBSERVING AND RECORDING USING BINOCULARS Binoculars are an astronomer’s best friend because they are always ready for action and can provide outstanding views. Why binoculars? THE PLEIADES Open star clusters such as the Small, portable, and affordable, binoculars require Pleiades appear in glittering, little or no setting up. The image they produce at almost three-dimensional the eyepiece is the “right” way up (in contrast to relief through binoculars. telescopes, which may produce an inverted image), making them simple and intuitive to aim and use.

These units may also be written in various other forms, such as minutes of arc, arcmin, or just the symbol ‘ (for example, 43’). For even smaller divisions, the arcminute is divided into 60 arcseconds, seconds of arc, arcsec, or the symbol ”. When observing star clusters, nebulae, or the distance between double stars, arcminutes and arcseconds are the more common units. ” As its name suggests, this involves using known stars or group of stars to point the way to other stars and celestial objects.

Long-exposure photography records this motion as stars become arc-shaped trails centered on the celestial pole. 40 LOOKING UP NAVIGATING THE NIGHT SKY Knowing your time and location, and equipped with some knowledge of the relative sizes and brightnesses of celestial objects, you will be all set to start navigating the night sky. Getting your bearings As the Earth spins on its axis and moves around the Sun, the view of the stars from the Earth’s surface changes quite quickly. Therefore the starting point for any astronomical observation is a knowledge of the date and time, as well as the latitude and compass orientation of the observing site.

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The Practical Astronomer : Explore the wonders of the night sky by DK Publishing


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