Obs. : 2023-06-09
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.876e+08
Venus      8.675e+08
Earth      9.584e+08
Mars       8.675e+08
Jupiter    8.885e+08
Saturn     9.162e+08
Uranus     8.876e+08
Neptune    9.055e+08
Pluto      9.558e+08