hetegony

hetegony means the study of the origin of the planets in the solar system.

Etymology

From Ancient Greek ἔτης (étēs, “clansman”), from Proto-Indo-European *swé (“self”), plus -gony. See also ἑταῖρος (hetaîros, “companion”). Probably invented by Hannes Alfvén.https://web.archive.org/web/20170401121945/http://worldwidewords.org/nl/lumr.htm

noun

The study of the origin of the planets in the solar system.

Definitions & examples from Wiktionary (CC BY-SA 3.0).