Answer :
Answer is: Distance between the sun and Earth
Explanation:
Distance between Earth and Saturn is not correct answer because this distance varies greatly. When comparing distance we need some distance that is pretty much the same all the times. This is why distance between the sun and Earth is chosen to meassure distances in solar system.
Answers "Speed of rotation of Saturn" and "Speed of rotation of Earth" are not correct because they represent speed which can not measure distance.
Explanation:
Distance between Earth and Saturn is not correct answer because this distance varies greatly. When comparing distance we need some distance that is pretty much the same all the times. This is why distance between the sun and Earth is chosen to meassure distances in solar system.
Answers "Speed of rotation of Saturn" and "Speed of rotation of Earth" are not correct because they represent speed which can not measure distance.
Answer:
Distance between earth and sun.
Explanation:
The distance between earth and sun is used to compare the distance between the objects in our solar system. It is because the distance between earth and sun is called as one Astronomical unit.
1 Astronomical unit (AU) is equal to 149,597,870.7 Km.
It is the mean distance between earth and sun.
The time taken by light to cover 1 Astronomical Unit is 499 seconds.
This is a big unit of distance.