A heliometer (from Greek ἥλιος 'sun' and 'measure') is an instrument originally developed from the mid-eighteenth to early nineteenth centuries for measuring the variation of the Sun's diameter at different seasons of the year, but the modern version of the instrument is capable of much wider use. == Description == The basic concept is to introduce a split element into a telescope's optical path so as to produce a double image.
A heliometer (from Greek ἥλιος 'sun' and 'measure') is an instrument originally developed from the mid-eighteenth to early nineteenth centuries for measuring the variation of the Sun's diameter at different seasons of the year, but the modern version of the instrument is capable of much wider use. == Description == The basic concept is to introduce a split element into a telescope's optical path so as to produce a double image.
Source: Wikipedia "Heliometer" · CC BY-SA 4.0
Share this article: X · Bluesky