What are astronomical yardsticks used to determine distances to celestial objects?

1 Answer

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.