Question

If a galaxy is approximately 1 million light years away and 1 light year is about 1016 meters. About how many meters away is the galaxy?

a) 1.5×1010
b) 2.0×1010
c) 1.0×1015
d) 2.0×1015
e) 1.0×1016
f) 2.0×1016
g) 1.0×1019
h) 2.0×1019
i) 1.0×1022
j) 2.0 × 1022

Answer 1

The galaxy that is 1 million light years away is approximately 1.0x10^22 meters away, calculated by multiplying 1 million light years by the distance of a light year in meters (10^16 meters).

Step-by-step explanation:

If a galaxy is approximately 1 million light years away and 1 light year is approximately 1016 meters, then the distance to the galaxy in meters can be found by multiplying these two values together:

1. Distance in light years: 1 million light years (1×106 light years)
2. Distance of one light year in meters: 1016 meters
3. To find the total distance in meters: 1×106 × 1016 = 1022 meters

Therefore, the correct answer is 1022 meters, which corresponds to option (i) 1.0×1022.