基本解釋星子假說同根派生 planetesimal hypothesis相關(guān)詞英英字典柯林斯英英字典 the discredited theory that the close passage of a star to the sun caused many small bodies (planetesimals) to be drawn from the sun, eventually coalescing to form the planets planetesimal hypothesis劍橋字典planetesimal hypothesis柯林斯字典專業(yè)釋義地球科學(xué)星子假說