stellar stellar distance of each system are very Hao, such as auspicious system near the solar system is the most alpha Zen gray, stay away 4.26 light-years, or about 40 trillion kilometers. But the stars in the solar system near the world more, such as the moon away the world less than 2 second light, the sun away the world 500 second light. Or about 8.3 light-minute
.Astronomers measure the distance of a star or stars?
.The star is far from the world of stars to us. And the distance between the stars are so far away. So the use of units to tell the distance is kilometers, such as used to tell the distance on earth is the value of the number, source that is difficult to understand.Called light years is the distance that the light moves in time 1 year is a unit time display but light years is a unit of distance
.Measuring the distance from the earth to the stars do in many ways. One way is finding a parallax ดาวดวง. That night, which is a measuring distance of stellar relatively near Earth accurately than auspicious star which is so far awayIs to see the stars change position when observed from earth in separate time 6 months. The observation point and 2 times is located along a 2 times the distance between earth and the sun.And the distance between the earth and the sun. It may also measure the distance of a star by other methods, such as from light that appears Chandon าวฤก Phong such
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, measuring the distance from the earth to the stars by using parallax
.When the world is at the E1 who noticed stellar S in S2 scapula S1 to displaystyle S_2 = 2. Theta at an angle แพรัล relax of the stars. S notice from the point of difference 2A or 2 units, astronomy, when a = 1 AU, as the corner displaystyle. Theta.1 astronomical unit, if displaystyle. Theta was p arcsecond. Distances of stars S from earth is the displaystyle < br / >. Frac 1 p}} {{ The parsec
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