Question

When would it be most appropriate to measure space using astronomical units

Answer 1

An AU is usually used to measure the average distance between the center of the earth to center of the sun. Interplanetary distances are best measured by an AU.

Answer 2

The most appropriate place to use astronomical units to measure distance is the 'distance between the planets'.

Step-by-step explanation:

• Astronomical Unit is the distance of the earth’s center to the sun. It is used to 'measure the extremely large distance'.

• For example, the distance between 'earth and mercury', the distance between 'two galaxies' etc. are measured in astronomical unit.

• The distance of mercury and sun is about one third of the astronomical unit.

• So the interplanetary distance can be measured by using astronomical distance.