Obs. : 2018-04-10
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.490e+11
Venus      3.456e+11
Earth      3.460e+11
Mars       3.436e+11
Jupiter    3.458e+11
Saturn     3.436e+11
Uranus     3.484e+11
Neptune    3.476e+11
Pluto      3.444e+11