| heliometer | (n) an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope |
| Heliometer | n. [ Helio- + -meter: cf. F. héliomètre. ] (Astron.) An instrument devised originally for measuring the diameter of the sun; now employed for delicate measurements of the distance and relative direction of two stars too far apart to be easily measured in the field of view of an ordinary telescope. |
| ヘリオメーター | [heriome-ta-] (n) heliometer [Add to Longdo] |
| 太陽儀 | [たいようぎ, taiyougi] (n) heliometer [Add to Longdo] |