whAt DiD somE sCiEntists try to ExplAin By suggEsting thAt stArs rEpEl EACh othEr
A．why stArs movE so quiCkly.
B．why FEw stArs hAvE plAnEts.
C．why stArs ArEn't moving towArD onE AnothEr.
D．why stArs hAvEn't movED FArthEr ApArt.