| The Newtonian telescope is a type of reflecting telescope still in popular use. |
| In 1973 she built a reflecting telescope with a nine-inch mirror that she ground and polished herself. |
| Today, the reflecting telescope is considered as one of the most powerful scientific instruments ever invented. |
| The reflecting telescope, however, had in turn certain drawbacks of its own. |
| The school's Newtonian reflecting telescope gave hundreds of the pupils the chance to watch the transit live on a projected screen. |
| He developed a general rule for the focal length of lenses and described a reflecting telescope. |
