istemulsolarestealcatuitdinSoare,celenouaplanetelegateprinatractiedeacesta,satelitiiacestora,comete,meteoriti,gazsiprafinterplanetar.Celenouaplaneteseaflainacelasipla,eleserotescdin vestspreestinjurulSoarelui.Unnor demeteoritiseaflaintreplaneteleMartesiJupiter.SistemulSolaresteinvelitdeunnor denucleudecometa(nor de tipOort).Intregulsistemsolar are incentruSoarele, careemanain cosmos ocantitateenormadecaldurasilumina.