exoplanetは、地球と同様の特性を持つ惑星ですよね？写真を見るだけで、これらのプロパティをどのように決定できますか？これらのプロパティは何ですか？私のためにこのテーマに光をこぼしてもらえますか？
Exoplanet is a planet which has similar properties with Earth, isn't it? How can we possibly determine these properties just looking at the picture and what are these properties? Can you spill some light on this subject for me, please?