posted on Sep, 20 2014 @ 07:25 AM
Its because we can only see the fireballs intersecting with Earth. They are so small that we don't see them hitting other planets or the Sun. That is
why the fireballs seem to intersect only with Earth. I believe that sun gets hit by fireballs all the time, but its impossible to notice them because
of Sun's glare and that they are really small objects, only meters wide. The space is full of these objects, its no wonder that sometimes bigger
objects surprise us by hitting before we notice one, like Chelyabinsk meteor in 2013. Despite it was over 17 meters wide, it was not observed before
its hit, it was total surprise.