New PDF release: 3,000 Deep-Sky Objects: An Annotated Catalogue

By Ted Aranda

ISBN-10: 1441994181

ISBN-13: 9781441994189

This identify is a finished set of visible descriptions of deep-sky items seen from the northern hemisphere. it's a checklist of the main vast and systematic visible survey of the sky ever performed nowa days. 3,000 deep-sky items are indexed with brief descriptions of the visible visual appeal within the author's strong binocular telescope. gadgets within the booklet are equipped via place for simple id of unknown ambitions. complete indexes via catalog numbers and names permit searches for particular objects.

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Additional resources for 3,000 Deep-Sky Objects: An Annotated Catalogue

Sample text

So-called blue stars do not stray far from white: they are bluish at best, not truly blue. Stars toward the other end of the spectrum can be much more colorful, ranging all the way to deep gold. But no bright star, not even a “red giant” such as Betelgeuse or Antares, is actually red. Veritable red stars do exist, but only among the carbon stars, a rare class of pulsating variables none of which is close enough to Earth to be among the brightest stars in our sky. The most deeply colored carbon stars are a glowing-coal copper red (not stoplight red).

Galaxy: General BRIGHTNESS; surface brightness if notable. CONCENTRATION: type and degree. SHAPE. SIZE against field. Associated foreground STARS. Globular cluster: RESOLUTION. CONCENTRATION: type. SIZE against field. General APPEARANCE if notable: nature of outliers, massive or loose, regular or irregular, bright or faint. Nebula: BRIGHTNESS. SHAPE. SIZE against field. Associated STARS. T. 1007/978-1-4419-9419-6_6, © Springer Science+Business Media, LLC 2012 19 20 6 Observational Parameters in the Descriptions of This Catalogue Open cluster: NUMBER AND BRIGHTNESS OF STARS.

In fact, it is only visually that the intensity and simple beauty of bright stars can be appreciated: photography fails to convey these qualities adequately. ) Many bright stars are quite noticeably colored, but in most cases this means only that they have a mild tint of blue or yellow overlaying their predominantly white light. So-called blue stars do not stray far from white: they are bluish at best, not truly blue. Stars toward the other end of the spectrum can be much more colorful, ranging all the way to deep gold.

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3,000 Deep-Sky Objects: An Annotated Catalogue by Ted Aranda


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