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Scientists say a world that's 490 light-years away qualifies as the first confirmed Earth-sized exoplanet that could sustain life as we know it — but in an environment like nothing we've ever seen.<p>The planet, known as Kepler-186f, is "more of an Earth cousin than an Earth twin," Elisa Quintana, an …Universe
칠곡에는 팔거천이있다<br>팔공산에서 내려오는 하천으로<br>이를 밟지아니하고 둘러 산행하는것이 팔거환종주이다. 도상 60km 실제는 그 이상이다. 오늘은 국우터널에서 함지산 팔달교 금오동 명봉산 회귀 30km 를 6시간에 돌아왔다.<br>다음을 기약하며....