Obs. : 2020-04-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.591e+08
Venus      6.239e+08
Earth      6.288e+08
Mars       6.554e+08
Jupiter    6.551e+08
Saturn     6.551e+08
Uranus     6.488e+08
Neptune    6.527e+08
Pluto      6.551e+08