english: Dark matter is only very weakly interacting with light, which means it doesn't shine or reflect light in the way that stars and planets do, but, in every other way, it behaves like ordinary matter -- it attracts things gravitationally.
non_english: Tamna materija vrlo malo dolazi u kontakt sa svetlošću, što znači da ne sija i ne reflektuje svetlost kao što to rade zvezde i planete, ali u svakom drugom smislu ponaša se kao obična materija - privlači stvari gravitacijom.