整理一下Kepler-452b的小檔案：
特殊意義：適居帶中首顆尺寸接近地球且繞行類日恆星的行星。
"Kepler-452b is the first near-Earth-Size planet
in the habitable zone of a star very similar to the sun."
Kepler-452b
◎ 所在位置：天鵝座，距太陽系約1,400光年處
◎ 體積：約較地球大60%
◎ 質量：未知
◎ 組成物質：未知
◎ 分類：超級地球
◎ 繞行恆星：Kepler-452
◎ 公轉週期：385日
◎ 軌道半長軸：1.05 AU (天文單位，即地球與太陽的平均距離)
◎ 恆星光譜：G2 (與太陽同為黃色恆星，也具有相似的溫度與質量)
◎ 恆星年齡：約60億歲，(較太陽年長15億歲)
其餘亮點：
1. 依據先前的研究，像Kepler-452b這樣尺寸的行星有相當可能具有岩石地表(類地行星)
"previous research suggests that planets the size of Kepler-452b
have a better than even chance of being rocky."
2. Kepler-452b從恆星所接收的能量略高於地球從太陽所接收的10%。
"Today Kepler-452b is receiving 10 percent more energy from its parent star
than the Earth is from the Sun."
3. 推測質量可能是地球的5倍。(現場是說2倍)
"However, since it is 60 percent bigger than Earth, it is likely to be
approximately five Earth masses, ..."
Jon Jenkins: "Kepler 452B is around twice the mass of Earth."
4. 表面可能擁有液態水、活躍的火山以及行光合作用的植物。
"Kepler could also have liquid water, active volcanoes and photosynthesising
plants on its surface."
以上。
出處：
1. Kepler-452b: Earth's Bigger, Older Cousin