Did you know that comets are often described as "dirty snowballs"? This nickname comes from their composition, which includes ice, dust, and rocky materials. When a comet approaches the sun, the heat causes the ice to vaporize, creating a glowing coma and sometimes a spectacular tail that can stretch for millions of kilometers. Each comet has a unique orbit, and many take thousands of years to complete a single journey around the sun. Their breathtaking displays remind us of the wonders of our solar system.