actinometer
Sign in to savethumb|255px|An actinometer instrument from the 1800s designed by John Herschel and used to estimate the temperature of the Sun's surface.
Wikidata facts
- Subclass of
- meteorological instrument
Show 2 more facts
- time of discovery or invention
- 1825-00-00
- Commons category
- Measuring instruments (sunshine)
Sources (2)
via Wikidata · CC0