Why is it called that? The pronunciation and the history of the name.
One of the first observational surprises was that Kuiper belt objects
can be grouped according to the shapes
and sizes of their orbits. We currently recognise these classes:
Escaped Kuiper belt objects (probably)
Plutoids Medical treatment neither possible nor necessary.
Comments about Planet X, with which large Kuiper belt objects are commonly
Inactive Halley type comets.
Think Piece A short article about planetary science sociology and politics. Also
available in French (thanks, Audrey). [pdf file]
The International Astronomical Union and the new view of Pluto.