They're not planets, but red-shifted absorption lines in the spectrum of beta pictoris were posited to be formed by these objects. JFCs and HTCs are subclasses of these objects, many of which are designated by a number, followed by a P, then a slash and a name. The Rosetta probe launched the Philae lander onto one of these 
They're not planets, but red-shifted absorption lines in the spectrum of beta pictoris were posited to be formed by these objects. JFCs and HTCs are subclasses of these objects, many of which are designated by a number, followed by a P, then a slash and a name. The Rosetta probe launched the Philae lander onto one of these objects. Remnants of these objects are responsible for the Orionids, (*) Perseids, and Leonids, the last of which is caused by Tempel-Tuttle. Short period ones originate in the Kuiper Belt, and long period ones originate in the Oort cloud. For 10 points, name these astronomical objects that contain an icy nucleus surrounded by a coma and tail, that include Hale-Bopp and one named for Edmund Halley.
They're not planets, but red-shifted absorption lines in the spectrum of beta pictoris were posited to be formed by these objects.
comets