"खगोल शास्त्र" का संशोधनहरू बिचको अन्तर

The early [[astronomer]]s were [[trader]]s andर [[sailor]]s who depended on the stars to guide them at night andर [[farmer]]s who knew by the rising andर setting of certain [[constellation]]s that planting, [[flooding]] , or [[harvest]]ing times were near. They were also the ancient civilizations who built such places as [[Stonehenge]] andर the native [[North America]]n [[Medicine wheel|medicine wheels]] for unknown, but probably [[sacred]], reasons andर needed precise knowledge of the phases of the [[Moon#Earth.27s_moon|moon]], the northernmost andर southernmost [[season]]al points of the sun, andर other information for their purposes.

Other observers believed the future could be predicted by where the [[planet]]s were in the sky when a person was born. Even though the study of stars andर planets for this reason is not usually thought of as a science today, these [[astrology|astrologers]] kept careful records of their observations. These observations were of great importance to astronomers durin the past two [[century|centuries]] in trying to make sense of the [[universe]].

Not only is astronomy a very old science, it is also one that can be practiced today with no special equipment or with very inexpensive equipment. Amateur astronomers have contributed a lot of new andर useful information, usually about new [[asteroid]]s or [[comet]]s, but sometimes about events such as the birth or death of stars. While some astronomy research does take a great deal of money (for example, a project like the [[Hubble Space Telescope]]), good astronomy can be done with a simple pair of [[binoculars]].

A pair of binoculars is, in fact, the ''best'' tool for a new astronomer. Many new astronomers buy expensive or poorly made [[telescope]]s, but do not know how to use them, do not know what they are looking at, andर soon become frustrated andर go on to another hobby. Amateurs should buy books or charts showing the constellations andर the important stars they contain. They will take time to learn andर understand the [[Celestial mechanics|motion]]s of the [[Earth]], the moon, andर the planets. They will spend some time working andर learning with only their eyes andर a simple recording tool such as a notebook.

Binoculars are an excellent tool for a beginner, because they are inexpensive, they do not need to be set up or taken down, they are easy to use, andर they let the user see interesting things such as the moon's [[crater]]s, double stars, star clusters such as the [[Pleiades]], andर the moons of other planets. They are even better than telescopes for looking at things such as the closer galaxies or very bright comets. When an amateur astronomer has taken some time to learn andर understand the night sky, ''then'' it is time to buy a telescope.

Astronomy has become a very large science in the past few hundred years, andर has many branches.

There are also astronomers who never look at the sky at all. These ''[[theoretical]]'' astronomers use the laws of [[physics]] andर [[mathematics]] in combination with [[computers]] to create ''[[Model (abstract)|models]]'' of how the universe behaves, then they compare their models to what is observed. Their goal is to understand andर predict the events which happen in the universe andर how the universe was formed.

* [http://www.dustbunny.com/afk/ Astronomy site specifically designed for kids andर their parents. ]