Comets are bodies of stone splinters and frozen gases that evaporate near the Sun. These gases form a tail, which is visible in the sky with the naked eye. All comets in the Solar System together weigh less than the Earth. They fly at a speed of about 1,200 km/h. And the most famous of them, of course, is Halley’s Comet. It returns to the Sun and is observed every 76 years. It was first spotted 2,500 years ago, and the last time was in 1986.
So, have fun and be aware!