| planet be | 8.82 | Planets are circular. | ||
| planet have | 2.24 | Do all the planets have moons? | ||
| planet orbit | 1.32 | The planets orbit around the sun. | ||
| planet form | 1.12 | The very beginning, when the planets in the solar system were forming. | ||
| planet exist | 0.53 | But such telescopes could do no more than tell us that the planets exist. | ||
| planet move | 0.53 | The planets move as they should and the sun shines. | ||
| planet appear | 0.46 | Extrasolar planets have now appeared almost next door to the solar system, too. | ||
| planet remain | 0.39 | So the planet remained a barren rock. | ||
| planet rotate | 0.39 | The planets rotate around the sun. | ||
| planet turn | 0.39 | The planet turns round once every twenty four hours. | ||
| planet warm | 0.39 | On the other hand, the planet has been warming somewhat. | ||
| planet align | 0.33 | But the planets have aligned. | ||
| planet come | 0.33 | All the planets are coming into alignment. | ||
| planet face | 0.33 | Some environmentalists have concluded that the planet faces certain doom. | ||
| planet seem | 0.33 | The planets will seem to be in a fairly straight line. | ||
| planet cool | 0.26 | The planet cooled as a result. | ||
| planet do | 0.26 | What are the planets doing? | ||
| planet grow | 0.26 | The planet grows to fill the screen, the saucer glows as it passes into the atmosphere. |