Excerpt from The Constellations and How to Find Them; 13 Maps, Showing the Position of the Constellations in the Sky During Each Month of Any Year
Fig. 2. Is a representation of the North Polar heavens when Alpha Draconis was nearest the Pole. It will be seen that at that time the constellation of Draco, the Dragon, occupied the furthest North part of the celestial sphere - and thus would hold a prominent position in the heavens - the star that was then brightest in this constellation (thuban) would be the Pole Star of the period, years ago.
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HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000. Codice articolo LW-9781528081412
Quantità: 15 disponibili