| 1 | In 1930, astronomer Clyde Tombaugh discovered the dwarf planet Pluto while looking at photographs of the night sky. | |
| 2 | Even tiny Pluto, which was demoted to dwarf status, has four moons. | |
| 3 | Now, new research indicates that Pluto may have suffered a similar fate. | |
| 4 | The next breath you take could have come from beyond Pluto. | |
| 5 | It has been observed, for instance that Mars, Jupiter and Pluto are all warming up. |