Question

We use light-years to measure distances outside of our solar system.
a) True
b) False

Answer 1

Distances in space are measured in light-years. One light-year is approximately 9.5 trillion kilometers or 9.5 x 10^12 meters. Andromeda, the nearest large galaxy, is approximately 1.9 x 10^19 meters away.

Step-by-step explanation:

Distances in space are indeed measured in light-years, making statement 'a) True' correct. A light-year is the distance that light travels in one year. In terms of meters, one light-year is equivalent to approximately 9.5 trillion kilometers or about 9.5 x 1012 meters. To calculate the distance to Andromeda, which is 2.00 x 106 light years away, we can multiply this value by the length of a light-year to find that it is approximately 1.9 x 1019 meters away.