Obs. : 2025-12-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.186e+08
Venus      8.186e+08
Earth      9.136e+08
Mars       8.125e+08
Jupiter    9.172e+08
Saturn     8.561e+08
Uranus     9.202e+08
Neptune    8.561e+08
Pluto      8.146e+08