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 Introduction to Constellations
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| səhifə | 1/6 | | tarix | 31.12.2022 | | ölçüsü | 1,98 Mb. | | #98079 |
| constellations powerpoint(2) - People have watched the night skies for millions of years. Some just out of curiosity. Some out of boredom. Some looking for portents, either good or bad.
- However, the one thing that they all saw was that there was a pattern in the way the stars revolved around the heavens.
The Night Sky - You need only to look up for a few hours to begin to see these same patterns yourself. Like the Sun, stars rise in the east and set later in the west. Planets follow this same pattern unless they are in a retrograde period, though these periods are not especially common.
What You Need for Stargazing - You don’t really need anything, but some things are handy, like…
- Complete darkness-Don’t laugh, it’s not that easy to find. Rural area are slowly being urbanized, bringing their lights with them. Light pollution is a real problem.
What You Need: Darkness What You Need: Star Map/ Planesphere - It is handy to have a star map to help get you oriented.
- Star Maps are also called planespheres.
- You can find them in hobby stores for a couple of bucks.
Finding Polaris and Why - Polaris (or the North Star) is where you want to start. Because Polaris is aligned with the Earth’s axis of rotation, it remains fixed, with all the other planets and stars appearing to move around it. It is the one star that remains fixed at all times.
Getting Oriented or Where the Heck is North? - Yea, you have to find north. It’s where Polaris (or North Star) is. You’ll need a compass or major highway to orient yourself. Highway 17 is good because it runs due north and south.
- You can make a compass with a needle, magnet and a cup of water. Just rub the needle across a magnet (see your refrigerator) or leave it attached overnight. Then rub the needle across your nose and place it in the cup very gently. It will float. It will turn north.
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