Obs. : 2017-04-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.744e+11
Venus      3.730e+11
Earth      3.715e+11
Mars       3.817e+11
Jupiter    3.781e+11
Saturn     3.663e+11
Uranus     3.768e+11
Neptune    3.711e+11
Pluto      3.661e+11