{"product_id":"the-everchanging-sky-a-guide-to-the-celestial-sphere","title":"The Ever-Changing Sky: A Guide to the Celestial Sphere","description":"\u003cp\u003eThe Ever-Changing Sky is a comprehensive and uniquely non-mathematical guide to spherical astronomy. In a clear and lucid text  it guides through terrestrial and celestial co-ordinate systems  time measurement and celestial navigation  on to the stars and constellations (with useful star maps provided)  the motions and appearance of the Moon and planets  tides and eclipses  and the smaller bodies of the Solar System (asteroids  meteors  meteorites and comets). There is also a brief overview of atmospheric phenomena. This text is invaluable to students of naked-eye astronomy  amateur and professional astronomers  and more general readers wanting to know how the night sky changes.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":44958219239477,"sku":"ByrdShop_0521380537","price":53.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8139\/0901\/files\/9780521380539.jpg?v=1770369814","url":"https:\/\/atxbooks.com\/products\/the-everchanging-sky-a-guide-to-the-celestial-sphere","provider":"ATX Books","version":"1.0","type":"link"}