Hakuluettelo:
Käännös:
photoheliometer (suomeksi)
- Määritelmät:
- (lb, en, historical) A double-lens instrument for measuring slight variations of the Sun's diameter by photography, based on the common chord of two overlapping images.
Viimeisimmät haut: photoheliometer, Red-billed Francolin, amateur nights, longtimer, Evergreen, enhaloing