I do not now support global radio silence (so they can’t find us), but it might be a good idea.

For quite a while, probably about since Ceres was discovered, astronomers theorised about the possibility of there being an object at the Earth-180 point; it’d have the same period, if it was at the same distance.

Unfortunately, this doesn’t quite hold. The Earth’s orbit is (very, very) slightly inclined, and slightly more elliptical; as such, over a period of time, there isn’t a permanently obscured point directly behind the sun. (This was addressed in the Sagan/Shklovsky book, so I think it’s been a solved problem for a few decades now)

So if there was anything big there, we’d have noticed it – eclipse photographs show up this kind of problem well.

As far as smaller objects go, the opposite point isn’t gravitationally stable; the stable points are sixty degrees ahead and behind us in orbit. If it was there, then gravitational pertubations would tend to mean it would “fall out” of position, and wind up at one of the stable points. Not sure of the timescale for this, mind you.

Because you don’t care about the primitives on SolIII.

It is very easy to put our craft into orbit exactly opposite the earth, on the other side of the sun, and as close or as far from the sun as we would like

No, you need to use your engines to keep station if you don’t match Earth’s orbit.

It is very easy to put our craft into orbit exactly opposite the earth, on the other side of the sun, and as close or as far from the sun as we would like (to duplicate the heat intensity, and rotation cycle), similar to our original systems. Actually, there are several orbiting visitors that are enjoying this solar system. Why bother alerting earth’s inhabitants of our existence when they are fighting each other most of time.

This message is the first from the Intergalatic Union (IU), and a suggestion that you earth people should attempt to work out your problems. Your women look really attractive. Our mating connectors may be too long.