出典:Wiktionary
出典:『Wiktionary』 (2025/03/18 20:16 UTC 版)
Formed from planet by analogy with infinitesimal.
planetesimal (plural planetesimals)
planetesimal (not comparable)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/20 08:41 UTC 版)
Planetesimals (English pronunciation: /plænɨˈtɛsɨməlz/) are solid objects thought to exist in protoplanetary disks and in debris disks.