Obs. : 2025-09-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.798e+08
Venus      7.822e+08
Earth      9.130e+08
Mars       8.106e+08
Jupiter    8.173e+08
Saturn     9.100e+08
Uranus     8.569e+08
Neptune    9.011e+08
Pluto      9.035e+08