Obs. : 2019-12-31
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.159e+08
Venus      6.340e+08
Earth      6.127e+08
Mars       6.034e+08
Jupiter    6.159e+08
Saturn     6.322e+08
Uranus     6.117e+08
Neptune    6.285e+08
Pluto      6.322e+08