Question

the nearest known exoplanet from earth is 4.25 light years away .how many km is this? give your answer in standard form

Answer 1

4.021 × 10¹³ km

Explanation:

The conversion factor of light years to km is;

1 light year = 9.461 × 10¹² km

Thus;

4.25 light years = 4.25 × 9.461 × 10¹² km = 4.021 × 10¹³ km