Abstract: Observations of the spectrum of Venus have been carried out in an effort to identify possible minor atmospheric constituents. A search was made for water vapor near 8200Å, C3O2 below 3500Å, two unidentified absorptions ...

Abstract: Assuming that the shapes of weak methane lines are determined by hydrogen and helium and helium collisional broadening, the value of H/He in the Jovian atmosphere is found to be much greater than unity. A preliminary ...