Introduction to Astronomy and Motions of the Sky

Introduction to Astronomy and Motions of the Sky -...

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Unformatted text preview: Introduction to Astronomy and Motions of the Sky Also, other aspects of the sky were important, and are still important today. Do you know what the phase of the Moon is today? Do you think that is important? You probably don't think it is, but several major cultures still use the Moon as a basis for their calendars - these include people who use the Islamic, Judaic, or Chinese calendar. That's a pretty large number of people. You still think that you don't care about what the phase of the Moon is? You don't think it's important for the typical Iowan? Here's a question - how is the date of Easter determined? You know it is on a Sunday, but the date changes from year to year. Why? I'll tell you - it depends upon both the Sun and the Moon. The day that Easter is celebrated on is the first Sunday after the first Full Moon after the first day of Spring (also called the Vernal Equinox). You can go look it up - you'll see that this is how it is set up! The first day of Spring is based upon the location of the Sun in see that this is how it is set up!...
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