Venus transit 2004: Illustrating the capability of exoplanet transmission spectroscopy P. Hedelt, R. Alonso, T. Brown, M. Collados Vera, H. Rauer, H. Schleicher, W. Schmidt, F. Schreier and R. Titz A&A, 533 (2011) A136 Published online: 16 September 2011 DOI: 10.1051/0004-6361/201016237