Obs. : 2018-01-24
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.438e+11
Venus      3.495e+11
Earth      3.390e+11
Mars       3.385e+11
Jupiter    3.385e+11
Saturn     3.408e+11
Uranus     3.379e+11
Neptune    3.460e+11
Pluto      3.438e+11