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100 st figurer (50 st röda och 50 st blå)
a section on planetary observing
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Venus and Mercury, and How to Observe Them FÖR METE 100 st figurer (50 stMercury and Venus known as the "inferior planets" because they are closer to the Sun than the Earth is have always been regarded as difficult and even dangerous targets for amateur astronomers. Venus and Mercury, and How to Observe Them, Authors: Grego, Peter Recent advances in commercially made instruments have, however, brought them within range of only moderately experienced observers, and certainly Mercury and Venus are by no means inferior in
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