These objects are divided into short-period, which come from the Kuiper Belt, and long-period, which come from the Oort Cloud.
One group of these objects is named after Heinrich Kreutz. A transparent, silicon-based solid known as aerogel is used to collect samples of these objects. They can be divided into Type I and Type II depending on the nature of their (*) coma. These objects are divided into short-period, which come from the Kuiper Belt, and long-period, which come from the Oort Cloud. For 10 points, name these astronomical objects often described as "dirty snowballs," the most famous of which is named after Edmond Halley.
One group of these objects is named after Heinrich Kreutz. A transparent, silicon-based solid known as aerogel is used to collect samples of these objects.
comets