nordlead on 25 September 2009
#2 does not mean that the planet is on the other side of the sun. It just means that it is the same distance from the sun as the earth is. So your question is actually pretty pointless since we could just look straight at it unless it happened to be on the opposite side of the sun. We could then use a whole bunch of various methods to easily see it since it isn't that far away.
