Hi everyone ! I am doing a report of some papers on extrasolar planets and I would like to clarify some points! 1) What is the difference between oberving in the IR at 4microns or 24microns ? what do you get in difference in observation ? 2)how can a measure of flux decrement can affect our understanding of the atmosphere of the planet ? and finally 3) if water and CO are being revealed, how does this affect the survival prospects of extrasolar planets ? I hope you will be able to help me! Thanks to all !