Unilateralism has generally been considered a concept with negative connotations. It should be underscored that in some cases unilateralism has resulted in changes either to customary law or treaty law, whereas in others it has not. Consequently, not every type of unilateralism can be perceived as a challenge to Space Law. Nevertheless, we can see the risks of unilateralism when not acquiesced to or generally supported by other States. It is obvious that the multilateral process is becoming more complicated than before which complicates finding multilateral solutions in Space Law. This paper argues that a better understanding of unilateral acts is necessary before delving into the matter of the unilateralism in Space Law.