11.   The Earth and the other planets revolve around the sun.

12.   The greenhouse gas that he thought could have provided the warming blanket over the two planets was ammonia.

13.   The three planets will remain close together Thanksgiving evening, when a new crescent moon will join them.

14.   This primordial matter no longer exists in its original form on Earth, or on any of the other planets.

15.   Each evening, the alignment will assume different shapes, as the five planets take their orbital paths around the sun.

16.   The other two planets are huge.

17.   When the nine planets rotate to such a position that the earth is separated from the other eight by the sun, major climatic changes occur, Xu said.