1·Planets are believed to emerge from the accretion of particles in a disk of gas and dust as they whirl around the star.
行星被认为是由围绕恒星旋转的气体和尘埃组成的圆盘中的粒子累积而成。
2·There are commonly the helical structures in the celestial body from many gigantic whirl nebulae to small meteoric stone and dust falling to the Earth.
天体中， 从众多的硕大的旋涡状星云， 到坠落于地球上的微小的陨砂、陨尘， 普遍存在着螺旋状的结构形态。