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![Observing And Measuring Visual Double Stars [with Cdrom]](http://ib.boeklezers.be/images/book/5/7/2/4/085-0_list.jpg)
Observing And Measuring Visual Double Stars [with Cdrom]
Double stars are the rule, rather than the exception: our solar system, having a single sun, is in the minority. Enormous numbers of wide, faint pairs areund... »
Double stars are the rule, rather than the exception: our solar system, having a single sun, is in the minority. Enormous numbers of wide, faint pairs areund... »
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