Misc: what type of insect performs a waggle dance?

Questions

Astronomy The tides on the earth's oceans are actually created by gravitational pull from the ?

Astronomy This cluster of stars is also known as the Seven Sisters.?

Astronomy This comet appears every 76.3 years.?

Astronomy This planet's diameter is most equal to that of the earth's.?

Astronomy What does "Ursa Major" mean in everyday English?