Obs. : 2019-08-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.400e+11
Venus      3.380e+11
Earth      3.501e+11
Mars       3.380e+11
Jupiter    3.454e+11
Saturn     3.481e+11
Uranus     3.531e+11
Neptune    3.501e+11
Pluto      3.481e+11