Obs. : 2009-02-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.434e+11
Venus      3.447e+11
Earth      3.441e+11
Mars       3.434e+11
Jupiter    3.434e+11
Saturn     3.397e+11
Uranus     3.502e+11
Neptune    3.509e+11
Pluto      3.317e+11