heliometer

the astronomer used a heliometer to measure the distance to the star.

heliometers are essential tools in solar research.

in the 19th century, heliometers revolutionized astronomy.

she learned to calibrate the heliometer for accurate readings.

the heliometer helped confirm the existence of exoplanets.

using a heliometer requires specialized training.

the data from the heliometer was crucial for the study.

he explained how the heliometer works to the students.

many observatories have upgraded to digital heliometers.

the accuracy of the heliometer is unmatched in the field.