出典:Wiktionary
出典:『Wiktionary』 (2026/03/10 00:44 UTC 版)
From Ancient Greek Ἠχώ (Ēkhṓ, “sound”).
Echo
From Ancient Greek Ἠχώ (Ēkhṓ).
出典:Wikipedia
出典:『Wikipedia』 (2011/05/29 07:51 UTC 版)
The Exoplanet Characterisation Observatory (EChO) is a proposed space telescope that has been selected for further studies as part of the Cosmic Vision roadmap of the European Space Agency, and is competing with three other missions for the M3 slot in the programme.
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