Description:  An instructive and clever book of dials and paper globes you can construct to teach astronomy.  The book is unused and in mint condition.

From the book publisher’s blurbs:” Some ideas become much easier to understand if you make working 3-dimensional models and this book contains three different ones which help to explain the relationships between the Earth, Sun, and Moon in an original and practical way. These relationships are important in understanding why the tides behave as they do and the minibook is packed with additional information, interesting facts, and further explanations.

Make the moon globe and see the hidden far side of the Moon and also all the sites on the near side where the Apollo spacecraft landed. Make the Sun & Moon Dial and use it to find the time from the Sun during the day and from the Moon at night. Make the Ecliptic Dial Model and use it to understand the importance of the ecliptic and to mimic the motions in three dimensions of the Sun, Moon and planets across the sky on any day of the year. This combination of working models and written explanations brings the subject to life in a way that no conventional book can.

Why are there two high tides and two low tides each day?

What are spring tides and neap tides and why do they occur?

Why are the times of high tide roughly 50 minutes later each day?

Why are the tides so different at different places?

Do the highest tides occur with the new moon or the full moon?

What is special about the Bay of Fundy, the Bristol Channel or the Bay of St. Malo?

What is a tidal bore?

What opportunities are there of using the tides as a source of renewable energy?

Find the answers to all these questions in the minibook which is included."

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