Dark matter is a hypothetical type of matter.
Sheykh Ali Mahalleh -LRB- شيخ علي محله , also Romanized as Sheykh ` Ali Mahalleh -RRB- is a village in Virmuni Rural District , in the Central District of Astara County , Gilan Province , Iran .. Province. Provinces of Iran. Gilan. Gilan Province. County. Counties of Iran. Astara. Astara County. Central. Central District ( Astara County ). Rural District. Rural Districts of Iran. Virmuni. Virmuni Rural District. Virmuni Rural District. Virmuni Rural District. Central District. Central District ( Astara County ). Astara County. Astara County. Gilan Province. Gilan Province. Iran. Iran. At the 2006 census , its population was 94 , in 23 families .