Obs. : 2020-04-09
Planet	Ly alpha (photons/cm^2/sec)
Mercury    6.481e+08
Venus      6.236e+08
Earth      6.315e+08
Mars       6.385e+08
Jupiter    6.376e+08
Saturn     6.376e+08
Uranus     6.463e+08
Neptune    6.453e+08
Pluto      6.376e+08