The Oort Cloud is primarily composed of very faint comets, which are not detectable by telescopes on earth. However, a number of larger objects resembling comets in composition have been discovered. To date these Trans-Neptunian objects are as follows: | The Oort Cloud is primarily composed of very faint comets, which are not detectable by telescopes on earth. However, a number of larger objects resembling comets in composition have been discovered. To date these Trans-Neptunian objects are as follows: |