1. Loose collections of these ices and small rocky particles form into comets. 这些冰和小岩石粒的松散集合形成了彗星。
2. However, unlike Jupiter, the terrestrial planets today are nearly void of light gases and ices. 然而，如今的类地行星与木星不同，几乎没有轻气体和冰。
3. They can go beneath the ice, and then to hibernate as the ices closes in, until we need them to carry out their research in unreachable areas. 它们能潜入冰层下面，然后结冰时就进入冬眠，直到我们需要它们在无法到达的地方进行研究。
4. Far from the sun, in the outer solar system, beyond Jupiter's orbit, temperatures are low enough to permit ices to form out of water and out of gases like methane and carbon dioxide. 在远离太阳的外太阳系，在木星轨道之外，温度低到足以使冰从水以及甲烷和二氧化碳等气体中形成。
