How far from earth to betelgeuse in miles?

Answer 1

Betelgeuse is 640 light-years away from the Earth.

1 light-year is the distance traveled by light in 1 year.

speed of light = 3 x 108 meters per second

So, 1 ly = 3 x 108 x 365 x 24 x 60 x 60 = 9.46 x 1015 meters

640 light-years = 640 x 9.46 x 1015 = 6.05 x 1018 meters

1 meter = 0.621 x 10-3 miles

640 light-years = 6.05 x 1018 x 0.621 x 10-3 = 3.76 x 1015 miles

That is 3,760,000,000,000,000 miles.

Answer 2

Betelgeuse is approximately 642.5 light-years away from Earth. In miles, that distance is about 3.784 × 10^15 miles.