| A | B |
|---|
| Mercury | Closest to the sun, this planet awaits a visit from the Messenger spacecraft. |
| Jupiter | Largest of all the planets, this gas giant is home to the Great Red Spot. |
| Mars | This red planet has ice caps made of carbon dioxide. |
| Uranus | Seasons last 20 years on this planet, the only one to lie on its side. |
| Neptune | Farthest from the sun, the planet has six known rings and 13 moons. |
| Venus | Sometimes called Earth's twin, this planet is actually much hotter than our home. |
| Saturn | Famous for its rings, this planet is second in size. |
| Earth | So far as we know, life exists only on this watery planet. |
