Obs. : 2018-09-06
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.374e+11
Venus      3.392e+11
Earth      3.472e+11
Mars       3.415e+11
Jupiter    3.409e+11
Saturn     3.417e+11
Uranus     3.515e+11
Neptune    3.469e+11
Pluto      3.404e+11