heliometer

heliometer has 2 senses in the JumbleFix dictionary. Letters: 10.

Definitions

• n.. 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.
• 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