Question

The distance between exoplanets and planet earth is measured in ________. miles meters lightyears kilometers

Answer 1

The distance between exo-planets and planet earth is measured in Light years, all other units are quite small, so they are inconvenient.

In short, Your Answer would be Option C

Hope this helps!

Answer 2

Light years

Step-by-step explanation:

The distance between exoplanets and planet earth is measured in light years. It is defined as the distance covered by light in one earth year. It is equal to

9.46 × 10¹⁵ meters. It is equal to 5.88 trillion miles.

The speed of light is 3 × 10⁸ m/s

Length of earth year is 365 days. On converting days into seconds we get 3.15 × 10⁷ seconds

So, on solving one light year equals 9.46 × 10¹⁵ meters

Hence, the correct option is (c) "light years ".