Last Updated：2025/11/22
(astronomy) A phenomenon caused by light reflected off surfaces distant from the source, and arriving at the observer with a delay relative to this distance, analogous to an echo of sound.
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
light echo
Edit Histories（0）
Source Word
light echo
（ plural ）
（ plural ）
