What are astronomical yardsticks used to determine distances to celestial objects?
Astronomical unit. Parsec. Light years.
Distance between earth and Moon is about 375000 Kilometers.
Sun is one astronomical unit from Earth
Light travels 300,000 kilometer/second.The distance traveled by light in one year is called light year.
= 300000x365.24x24x60x60 kilo0meters is one light year.
3.26 light years make one parsec.