TED】Jeremy Kasdin.地球型惑星の検出に役立つかもしれない花形の星影 (地球型惑星の検出に役立つかもしれない花形の星影｜ジェレミー・カスディン) (【TED】Jeremy Kasdin: The flower-shaped starshade that might help us detect Earth-like planets (The flower-shaped starshade that might help us detect Earth-like planets