Obs. : 2018-10-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.181e+11
Venus      3.186e+11
Earth      3.241e+11
Mars       3.250e+11
Jupiter    3.222e+11
Saturn     3.228e+11
Uranus     3.251e+11
Neptune    3.258e+11
Pluto      3.242e+11