Can you pass this 1980s quiz?
The arrival of which comet in 1986 was met by a series of American, Soviet, Japanese, and ESA probes?
Comet Kohoutek
Borrelly's Comet
Halley's Comet
Comet Encke
Hot Quizzes Trending Now
Puzzles
3.82 M Players
An electric train is moving north. Which way does the smoke blow?