A much lower density for the transiting extrasolar planet WASP-7 J. Southworth, M. Dominik, U. G. Jørgensen, S. Rahvar, C. Snodgrass, K. Alsubai, V. Bozza, P. Browne, M. Burgdorf, S. Calchi Novati et al. (22 more) A&A, 527 (2011) A8 Published online: 18 January 2011 DOI: 10.1051/0004-6361/201016183