美国国家航空航天局(NASA)每日一图-2017年6月26日

2017 June 26

Artistic Impression: The Surface of TRAPPIST-1f  Illustration Credit: NASA, JPL-Caltech, Spitzer Team, T. Pyle (IPAC)

Explanation: If you could stand on the surface of the newly discovered Earth-sized exoplanet TRAPPIST-1f, what would you see? Presently, no Earthling knows for sure, but the featured illustration depicts a reasoned guess based on observational data taken by NASA's Sun-orbiting Spitzer Space Telescope. In 2017, four more Earth-sized planets were found by Spitzer, including TRAPPIST-1f, in addition to three discovered in 2015 from the ground. From the planet's surface, near the mild terminator between night and day, you might see water, ice, and rock on the ground, while water-based clouds might hover above. Past the clouds, the small central star TRAPPIST-1 would appear more red than our Sun, but angularly larger due to the close orbit. With seven known Earth-sized planets -- many of which pass near each other -- the TRAPPIST-1 system is not only a candidate to have life, but intercommunicating life -- although a preliminary search has found no obvious transmissions.

2017年6月26日

艺术的印象:trappist-1f表面信贷的例子:美国宇航局加州理工学院喷气推进实验室,斯皮策的团队,T。派尔(ipac)

解说:如果你能站在这个新发现的地球大小的系外行星表面trappist-1f,你会看到什么?目前,没有人确切地知道,但这幅有特色的插图描绘了一个合理的猜测,根据美国宇航局的太阳飞行的斯皮策太空望远镜所拍摄的观测数据。在2017年,斯皮策发现了四颗地球大小的行星,其中包括TRAPPIST-1f,另外还有三颗从地面发现的三颗行星。从行星的表面,在夜晚和白天的温和终结者附近,你可以看到地面上的水、冰和岩石,而水上的云则可能盘旋在上面。在云中,小中心恒星TRAPPIST-1会比我们的太阳更红,但由于轨道的关闭,angularly的红移会更大。七个已知的地球大小的行星--其中许多靠近对方--trappist-1系统不仅是候选人,有生命,但互通的生活--虽然初步搜索没有发现明显的传输。

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