Unformatted text preview: THE NIGHT SKY KY S. ON The Evening Sky Map .S
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Copyright © 2000–2014 Kym Thalassoudis. All Rights Reserved.
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INSTRUCTIONS: THE SKY M
When observing the night sky, and in particular deep-sky objects such as star clusters,
nebulae, and galaxies, it’s always best to observe from a dark location. Avoid direct
light from street lights and other sources. If possible observe from a dark location
away from the light pollution that surrounds many of today’s large cities.
You will see more stars after your eyes adapt to the darkness—usually about 10 to
20 minutes after you go outside. Also, if you need to use a torch to view the sky
map, cover the light bulb with red cellophane. This will preserve your dark vision.
Finally, even though the Moon is one of the most stunning objects to view
through a telescope, its light is so bright that it brightens the sky and makes many of
the fainter objects very difﬁcult to see. So try to observe the evening sky on
moonless nights around either New Moon or Last Quarter. Astronomical Glossary
Conjunction – An alignment of two celestial bodies such that they present the least
angular separation as viewed from Earth.
Constellation – A deﬁned area of the sky containing a star pattern.
Diffuse Nebula – A cloud of gas illuminated by nearby stars.
Double Star – Two stars that appear close to each other in the sky; either linked by
gravity so that they orbit each other (binary star) or lying at different distances from
Earth (optical double). Apparent separation of stars is given in seconds of arc (").
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- Spring '10
- Telescope, Star cluster, evening sky, Sky Map