ヘリオスコープ

ヘ

リ

オ

ス

コ

ー

プ

Meanings

1

A specialized astronomical instrument for observing the sun, typically by projecting its image onto a screen or using filters.

こく

点てん

を

観かん

測そく

し

て

いる

。

At the observatory, they observe sunspots using a helioscope.

Borrowed from English 'helioscope', ultimately from Greek 'hēlios' (sun) and 'skopein' (to look at).