Obs. : 2020-02-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.169e+08
Venus      6.014e+08
Earth      6.078e+08
Mars       6.151e+08
Jupiter    6.205e+08
Saturn     6.205e+08
Uranus     5.916e+08
Neptune    6.146e+08
Pluto      6.205e+08