Question

define astronomical unit, light year and parasec​

Answer 1

Answer:

One light year is almost six trillion miles. And an astronomical unit is the average distance between the earth and the sun. So the distance to the sun is by definition one AU. A parsec is the distance at which one astronomical unit subtends an angle of one second of arc.

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Answer 2

the distance that light travels in one year, about 9.4607×1012 kilometres

प्रकाश वर्ष; एक वर्ष में प्रकाश द्वारा तय की जाने वाली दूरी जो लगभग 9.4607×1012 किलोमीटर ....

The parsec is a unit of length used to measure the large distances to astronomical objects outside the Solar System. One parsec is approximately equal to 31 trillion kilometres, or 210,000 astronomical units, and equates to about 3.3 light-years.

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