How many light years away is the asteroid belt from the sun?
The asteroid belt is between Mars & Jupiter, about 22 light minutes away from the sun (the earth, by contrast, is about 8 light minutes from the sun).
Rigel is in Orion, but not in its belt. It is the very bright star at the bottom right as we look at Orion. It is estimated to be anything between 700 and 900 light years away. 700 light years would be about 6,612,165,304,151,910 kilometres and 900 light years would be about 8,501,335,391,052,460 kilometres.