photometric quantity

measure used in astronomy

en-GB/ˌfəʊtəʊˈmɛtɹɪk ˈkwɒntɪtɪ/
en-US/ˌfoʊtoʊˈmɛtɹik ˈkwɑntɪti/

หมวดหมู่:

photometric quantity