The Astronomical Calendar is back!
It was popular as a printed book from 1974 to 2016, used by thousands of sky-lovers in more than 100 countries. It then continued as an electronic book. For 2023 it has reappeared, in both forms, printed and electronic.
It has 139 pages, and hundreds of illustrations, including charts and 3-D views of space. For each month there are 6 pages, with about 50 events, sky dome, diagram of where the planets are in their orbits, and 20 of the most interesting sky scenes. Then there are several-page sections on the Sun and seasons; the Moon; eclipses; occultations; each planet; asteroids; meteor showers. There is a full explanation of the main features, and a glossary of terms.
The printed book (which is letter-size to allow it to be printed on demand) is handy for referring from page to page. Coming to a date when there is a meteor shower or an opposition of Jupiter, you can also turn to the full information in the section on the planet or the “Meteors” section. You can compare the globe pictures for the April and October solar eclipses.
An advantage of the electronic book is that you can zoom in to see the illustrations in exquisite detail, magnified to full resolution. Another advantage is that you can search the document to find places where, for instance, “Neptune” or “eclipse season” is mentioned. There is a tip on how best to display the e-book on your device.
Electronic book: $12. When you order it (first button below) you will receive a link so that you can download the document, which you can save to your computer or other device. In fact there will be several opportunities to download it.
Printed book: $21 (it was $29.95 for the previous printed issues)
“The large Ottewell calendar deserves pride of place… a work of kinematics-made-vivid… a piece of original samizdat… Its author is a gifted artist… To his talented brush, his sense of form in space, and his apt and pithy choice of words, he has added a deft hand at the computer keyboard.” —Philip Morrison in Scientific American
“My husband just cries if he doesn’t find it under the Christmas tree…” —A reader in New Hampshire
“I found enough in the budget to buy 10 for our class. I don’t believe we could make it without them. It’s an amazing amount of information for so little money.” —A professor in California
The 2023 cover picture story is about Canopus, “the great star of the south, that guides travelers in the desert,” and that shows itself only at chosen times throughout the year
A sampling of the approximately 400 illustrations
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