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原文:
Why might you want to visit super-earth Cancri 55 e? Its extremely hot climate would be a deterrent, and fresh lava flows might be common. Discovered in 2004, the planet Cancri 55 e has twice the diameter of our Earth and about 10 times Earth’s mass. The planet orbits its 40 light-year distant Sun-like star well inside the orbit of Mercury, so close that it is tidally locked, meaning that it always keeps the same face toward the object it orbits — like our Moon does as it orbits the Earth. Astronomers have recently measured temperature changes on this exoplanet using infrared observations with the Spitzer Space Telescope. Given these observations, an artist created the featured video with educated guesses about what one revolution of Cancri 55 e might look like. Depicted are full phase, when the planet is fully illuminated, and new (dark) phase when it passes near the line of sight to Earth. The illustrated red bands on the Cancri 55 e indicate bands of lava that might flow on the planet. A recent density determination for 55 Cancri e show that this exoplanet is not made primarily of oxygen, as are the inner planets in our Solar System, but rather of carbon. Therefore, one reason to visit Cancri 55 e might be to study its core, because this planet’s great internal pressure might be sufficient to make the carbon found there into one huge diamond. New for Programmers: NASA Open API for APOD
中文翻譯:
🇭🇰 如果你對外太空充滿好奇，為什麼不考慮訪問超地球 Cancri 55 e 呢？雖然它的極端熱氣候和可能的熔岩流可能讓人卻步，但這顆行星的特點卻值得我們深入研究。
🌍 **Cancri 55 e** 於2004年被發現，直徑是地球的兩倍，質量約為地球的十倍。它距離我們約40光年，繞著一顆類似太陽的恆星運行，位置比水星還要靠近，因此它是潮汐鎖定的，意味著它總是將同一面朝向那顆恆星，就像我們的月球一樣。
🔭 最近，天文學家利用斯皮策太空望遠鏡進行了紅外觀測，測量了這顆外星行星的溫度變化。藝術家根據這些觀測結果創作了視頻，展示了 Cancri 55 e 一個完整革命的樣子，包括全面亮起的「滿相」和接近我們視線的「新月」相。在視頻中，紅色的熔岩帶顯示了行星上可能存在的熔岩流。
💎 55 Cancri e 的最近密度評估顯示，該行星並非主要由氧組成（如我們太陽系內的行星），而是由碳組成。因此，前往 Cancri 55 e 的一個理由是研究它的核心，因為那裡的巨大內部壓力可能足以將碳變成一個巨大的鑽石。
✨ 一場宇宙探險，讓我們深入探索這顆神秘的超地球，開啟全新的科學發現！
#Cancri55e #超地球 #外星探索 #太空科學 #鑽石星球 #宇宙探險 #天文學 #科學研究
來源:NASA每日圖片
