Below you can find the In 1986 this european probe observed halley's comet as it passed the earth Jeopardy Words Answer. The answer to In 1986 this european probe observed halley's comet as it passed the earth has 6 letters. This clue belongs to the Comet probes category and is part of Jeopardy Word Level 2516. If you scroll near the bottom you will find other clues and answers part of level 2516