Salat ul Kusuf (نمازكسوف)is a two or Four rakaah prayer performed during a solar eclipseسورج گرہن,
Salat ul Khusuf (نماز خسوف)is a two or Four rakaah prayer performed during a lunar eclipse (چاند گرہن)
Khasoof or Kasoof is a Nafl Not Obligatory Prayers.