Last Updated
：2025/11/22
planetesimal
（ plural ）
Quizzes for review
(astronomy) Any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction.
音声機能が動作しない場合はこちらをご確認ください
See correct answer
planetesimal
During the early stages of the solar system, a planetesimal accreted dust and ice until it became a protoplanet.
See correct answer
During the early stages of the solar system, a planetesimal accreted dust and ice until it became a protoplanet.
音声機能が動作しない場合はこちらをご確認ください
English - English
Word Edit Setting
- Users who have edit permission for words - All Users
- Screen new word creation
- Screen word edits
- Screen word deletion
- Screen the creation of new headword that may be duplicates
- Screen changing entry name
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Sentence Edit Setting
- Users who have edit permission for sentences - All Users
- Screen sentence deletion
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Quiz Edit Setting
- Users who have edit permission for quizzes - All Users
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
