Mercury

1) http://www.nasa.gov/worldbook/mercury_worldbook.html

2) http://www.youtube.com/watch?v=nK6ETuXgwb4

3) http://www.solarviews.com/eng/mercury.htm

Titan

1) http://space.about.com/od/saturn/a/titaninfo.htm

2) http://www.esa.int/esaMI/Cassini-Huygens/SEM696HHZTD_0.html

3) http://www.esa.int/esaMI/Cassini-Huygens/SEM696HHZTD_0.html