If a comet and/or meteor is coming at us from a direction behind the sun, then we wont see it coming anyway. Even the most powerful telescopes wont see it coming until its too late. So itll pop us without warning. Because nobodys going to look up and think, whats that black spot on the sun?
Nobody?
Hmmm..
I shot this black spot in front of the sun on 6/5/2013...Not a comet, but yes, people are watching.