Jan. 1, 2013 - Dec. 31, 2013
Cerro Paranal,deserto di atacama,Cile at Very Large Telescope
Jan. 1, 2011 - Dec. 31, 2012
Astrofisico at ESA - European Space Agency
Jan. 1, 2010 - Dec. 31, 2011
Houston at NASA - National Aeronautics and Space Administration
Jan. 1, 2006 - Dec. 31, 2010
Hawaii at W. M. Keck Observatory
