Obs. : 2017-05-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    2.716e+11
Venus      2.729e+11
Earth      2.833e+11
Mars       2.735e+11
Jupiter    2.765e+11
Saturn     2.803e+11
Uranus     2.711e+11
Neptune    2.738e+11
Pluto      2.788e+11