Obs. : 2020-04-06
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.384e+08
Venus      6.104e+08
Earth      6.206e+08
Mars       6.273e+08
Jupiter    6.258e+08
Saturn     6.258e+08
Uranus     6.357e+08
Neptune    6.384e+08
Pluto      6.258e+08