Peppy had had enough. This cycle of fusion and explosion was getting to her - she wanted to find someplace nice to settle down for a while. Explain how astronomers think that these two types formed. Last October, the first planet orbiting a sun-like star was detected around the star 51 Pegasus. Since then, half a dozen other planet detections have been made.
Astronomers are finally able to start testing their ideas about how planets form.
If you think the theory is broken, speculate on how it might be fixed. Describe how the initial atmospheres of terrestrial planets form. Over time, the atmosphere in which Peppy resided changed. And when she communicated with carbon atoms on other planets, she found that the conditions there were wildly different from where she lived. Describe how the atmospheres of Venus, Earth, and Mars evolved into what they are today.