1012 meters 1 billion kilometers ~7 astronomical units 十亿公里 Enclosed in the path of massive Jupicer,these are the orbits of the smaller earthlike inner planets:Mars,Earth,Venus,Mercury.Another swarm of objects too small and faint to make out without telescopic aid is present as well:Asteroids and meteors ply this darkness in the belt between the orbits of Mars and Jupiter m▣P.C▣m十亿公里