General Knowledge Quiz for Thursday, 14 April 2011

A new general knowledge quiz is available every day. Try today's quiz or work through our archive of daily and themed quizzes.

Question 1: What are Gliese 876 d, OGLE-2005-BLG-390Lb, MOA-2007-BLG-192Lb, COROT-Exo-7b, Gliese 581 d and Gliese 581 c?