Question

Outside our solar system the closest star to earth is Proxima century life from the start takes 2200000 minutes to reach earth. light in the Sun takes 8.3 minutes to reach. the speed of light is 18 00 0000 km/minute by calculation compare the distance of proxima century the Earth to the distance of the Sun from the Earth

Answer 1

2200000 = 2.2E6 min for light from Proxima to reach earth

8.3 min from light sun to reach earth

2.2E6/8.3 = 2.56E5 times for light from Proxima

Proxima is about 256,000 times farther away than the sun

Since the sun is about 93,000,000 = 9.3E7 miles from earth

Proxima is then 9.3E7 * 2.56E5 = 2.4E13 miles away

Note - the speed of light is

3.00E8 m/s * 60 s/min / 1000 m/km = 1.8E7 km/min as given