Obs. : 2015-04-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.787e+11
Venus      4.752e+11
Earth      5.442e+11
Mars       4.787e+11
Jupiter    4.781e+11
Saturn     5.414e+11
Uranus     4.841e+11
Neptune    4.886e+11
Pluto      5.176e+11