Obs. : 2012-04-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.614e+11
Venus      4.338e+11
Earth      4.236e+11
Mars       4.294e+11
Jupiter    4.517e+11
Saturn     4.192e+11
Uranus     4.666e+11
Neptune    4.704e+11
Pluto      4.284e+11