另外，近期对太阳系外行星的研究结论表示，行星数量并不算少。
Also, recent searches for extrasolar planets have concluded that planets are not rare.
太阳系已命名的卫星数量和已命名的行星数量比例要大于20：1。
The named moons of the solar system outnumber planets by more than 20 to 1, and they display a remarkable diversity.
直到现在尚不清楚这是否说明这些恒星所拥有的行星数量也很少。
It was unclear until now whether that meant they'd also be planet-poor.
应用推荐