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| | Astronomical Observations - Parts 1, 2, 3, 4 |
 | | This is where Carte du Ciel or SkyMap comes in handy, since they depict the stars and planets graphically, and include millions more objects and dozens of unabridged catalogues for the astronomer. |
 | | Carte du Ciel is especially useful for animating these apparent synodic motions against the background of the stars, since you can fine-tune increments down to days, hours and minutes, and mark the locations with "finder circles" to readily observe a planet's motion relative to the stars & constellation figures, and to the other planets. |
 | | Hence Orion's Belt, for example, is very close to the same position in the sky as it was when they built the Great Pyramids 10,500 BC, since the three stars of the belt have very low proper motion. |
| www.science-one.com /new-3693153-4253.html (5001 words) |
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