Question

On the 1 to 10 billion scale, about how far is it to the nearest stars besides the Sun?

Answer 1

On the scale 1 to 10 Billion km, the distance of the nearest star Proxima Centauri in the constellation Centaurus is 13100 units of 10 B km = 8141 units of 10 B miles..

Explanation:

The distance of Proxima Centasuri = 4.246 ligh years = 4.246 X 206264,8 AU = 875800.3408 AU = 875800.34o8 X 149597870.7 km = 1.31017866 E+14 km.
Here, 1 unit =10 billion km = 1. E+10 km.
So, Proxima Centauri is at a distance of 1.31017866 E+14 km / 1. E+10
=13100, in the new unit = 1. E+10 km = 8141 units of 10 B miles..

As the known distance 4.246 ly has only 4 sd, the answer was rounded to 4 sd. This is a necessary convention, for reliability. .