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![Observing Comets [with Cdrom]](http://ib.boeklezers.be/images/book/4/6/4/4/117-0_list.jpg)
Observing Variable Stars, Novae and Supernovae
Variable stars can be fascinating objects to study. This complete practical guide and resource package instructs amateur astronomers in observing and monitor... »
Variable stars can be fascinating objects to study. This complete practical guide and resource package instructs amateur astronomers in observing and monitor... »
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