Obs. : 2023-06-28
Planet	Ly alpha (photons/cm^2/sec)
Mercury    9.233e+08
Venus      9.056e+08
Earth      8.434e+08
Mars       9.065e+08
Jupiter    8.568e+08
Saturn     8.634e+08
Uranus     8.568e+08
Neptune    8.671e+08
Pluto      8.517e+08