Originally, you had to use sensor sweep to find foreign planets, mine sweep to find minefields, and WRS to find wormholes. The sensor sweep mission now does all of these.
(4.0e) Wormhole scanning now happens at the same place as sensor sweeping, too.
This is to simplify game play. For some things, you do not even have to scan in order to see them, so it makes little sense having to perform three different orders to see the others.
If you do not like this, turn it off by setting ExtendedSensorSweep to No. The original missions still function. To actually sweep or scoop mines, you still need mine sweep, of course.
