Obs. : 2019-01-13
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.524e+11
Venus      3.400e+11
Earth      3.464e+11
Mars       3.474e+11
Jupiter    3.417e+11
Saturn     3.524e+11
Uranus     3.457e+11
Neptune    3.551e+11
Pluto      3.524e+11