What Are Comet Tails? - Universe Today
Comets are renowned for their big beautiful tails that stretch across the sky. But what’s in those things, anyway? And how can comets get multiple tails? In the past, humans generally used one of two greetings for comets: 1. Dear God, what is that thing? Terrible omens! Surely we will all die in fire. 2. … Continue reading "What Are Comet Tails?"