Obs. : 2016-04-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.129e+11
Venus      4.100e+11
Earth      3.873e+11
Mars       3.886e+11
Jupiter    3.939e+11
Saturn     3.921e+11
Uranus     4.100e+11
Neptune    4.041e+11
Pluto      3.975e+11