Obs. : 2018-10-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.436e+11
Venus      3.465e+11
Earth      3.466e+11
Mars       3.489e+11
Jupiter    3.436e+11
Saturn     3.489e+11
Uranus     3.466e+11
Neptune    3.472e+11
Pluto      3.524e+11