Thomas Jones: When is a planet not a planet?
18 August 2005
“... System. It’s currently known only as 2003 UB313, because it was first seen – or, rather, ‘the data from which the object was discovered were obtained’, as one of its discoverers, Michael Brown, carefully puts it – in the second half of October 2003 (the 21st fortnight of the year; U is the 21st letter of the alphabet). Brown and his colleagues, Chad Trujillo and David Rabinowitz, have ...”