BSL – Getting to know the night sky

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For you to explore,
learn and enjoy the night sky
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Skymap.com to download
the latest and past issues in PDF format.
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FREE Sky Maps Each Month
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BSL Version

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• It is easy: you just have to look up!
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• When your eyes dark-adapted it won’t take you long to notice that the stars can be joined up to form patterns
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• You might recognise one straight away.
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• You may be able to see the giant saucepan-shaped Plough, balanced on the end of its handle.
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• But the Plough isn’t a constellation – it’s an asterism, a small pattern of stars immediately obvious to the naked eye.
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• Astronomy gives us the skills we need to observe these stars, constellations and planets with the naked eye, or to use binoculars and telescopes to observe deep-sky objects like nebulae, galaxies and globular clusters.
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• Deep Sky Objects are celestial objects that exist outside our solar system.
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• A dark sky is always good and sometimes absolutely necessary – but some objects can also be observed under a light-polluted city sky.

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BSL Version

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BSL Version

• Or enter a postcode or place name to find stargazing destinations or venues hosting forthcoming stargazing events – you can visit the GO Stargazing website for more information at what’s going on in your local.
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interstellarum Deep Sky Atlas

• It is an innovative, practical tool to choose and find stars, star clusters, nebulae and galaxies.
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• Usually, deep sky objects are shown with just a standard symbol in the star charts. This atlas is different: all objects are shown according to their actual visibility.
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• Four main visibility classes separate out objects that can be seen through visible in 4-inch, visible in 8-inch, visible in 12-inch telescopes, and not visible in 12 inch (means more bigger telescope from 14 inch+).
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• Within each visibility class, the objects are labelled in different type weights and using graduated shades and colours for the symbols – the bolder the label or the darker the symbol, the easier it is to see the object.
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• Spiral-bound and printed in red-light friendly colours on fully waterproof material, this full-sky atlas has a limiting magnitude of 9.5, plotting over 200,000 stars
  
  (Above more explanation in BSL ~ click below; interstellarum deep sky atlas by Derek Rowley)
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BSL Version

A note from Derek about interstellarum Deep Sky Atlas.
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• I do recommend this Star Atlas map.
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• this book is the ideal companion for amateur observers of all levels.
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• easy to read and understand.
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• more selection of deep-sky objects.