Obs. : 2020-06-06
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.384e+08
Venus      6.390e+08
Earth      6.480e+08
Mars       6.197e+08
Jupiter    6.338e+08
Saturn     6.338e+08
Uranus     6.356e+08
Neptune    6.177e+08
Pluto      6.338e+08