What is orrery?
Orrery is a model of the solar system that is designed to show the location of different planets and their relationships to each other. Using an internal hourly and gear toothed gear, the orrery can be performed to move, demonstrating the rotary patterns of various bodies in the solar system. These devices are sometimes called planetariums, which can be confusing for people who connect planetariums with large domes on which different images are reflected. For example, the Greeks have created several devices that resemble Orreries. The production of these devices really took off in the 18th century, when the famous orrers for Charles Boyl, the fourth Earl of Orrera, were commissioned, and people became more interested in the solar system and objects that inhabit it. High quality orrie can now get a high price, because construction techniques needed to build one are quite demanding; Handsters all over the world continue to produce Orreries in their workshops.
It may be a surprise to find out that many orreries do not include all planets. The sun is almost always represented, usually like a large ball in the center of the orrery, but the planets and the moon are very different. Earth and Jupiter are commonly included with Mars, Mercury and Venus, but other planets may or may not be displayed, depending on the intended use of the Orrie and the taste of the person that built it. Moons can also be included in a very complex orrry; This significantly increases the costs, because the months must be made into orbit planets, as the planets themselves orbit themselves in the sun.
Orrieries are not usually built to be a scale of scale, because the relative sizes of objects in the solar system cause it to be forbidden, as well as their comparative distances. However, it is typical to make the tracks as accurate as possible, so even if the planets may not be the right size or right distance from each other, it will complete its orbitNot exactly, which allows people to see how and when planets interact with each other.
Some classrooms have simple orreries to demonstrate basic themes in astronomy, although they more often use stationary models that must be moved manually to illustrate things such as eclipse and transit. It is also not unusual to see the orrers in the scientific museum or the astronomical center, and examples of antique orrersies can be found in some museums.