Obs. : 2018-01-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.737e+11
Venus      3.775e+11
Earth      3.840e+11
Mars       3.754e+11
Jupiter    3.754e+11
Saturn     3.737e+11
Uranus     3.769e+11
Neptune    3.781e+11
Pluto      3.778e+11