Complex sentence: Another evidence of the haze was obtained in 2002 due to new occultation: the part of stellar light, which even in the middle of the event reached Earth (due to refraction in Pluto's atmosphere), demonstrated increase of intensity with wavelength.
Split into simpler sentences: Another evidence of the haze was obtained in 2002 due to a new occultation. The stellar light which managed to reached Earth during the occultation (due to refraction in Pluto's atmosphere), demonstrated an increase of intensity with wavelength.