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亚博app安全有保障:NASA发现超级地球 或存在生命


本文摘要:After completing its first year of observations in the southern sky, NASAs Transiting Exoplanet Survey Satellite has spotted some intriguing new exoplanets only 31 light-years away from Earth.美国nasa的入境系从外行星精确测量通讯卫星(TESS)在顺利完成对东半球天上的第一年观察后,找到几个间距地球仅有31亿光年的有趣的新系外行星。


After completing its first year of observations in the southern sky, NASAs Transiting Exoplanet Survey Satellite has spotted some intriguing new exoplanets only 31 light-years away from Earth.美国nasa的入境系从外行星精确测量通讯卫星(TESS)在顺利完成对东半球天上的第一年观察后,找到几个间距地球仅有31亿光年的有趣的新系外行星。Multiple exoplanets -- planets orbiting stars outside our solar system -- were discovered orbiting an M-dwarf star, called GJ 357 in the Hydra constellation. The star is 40% cooler than our sun and only about a third of the suns mass and size. A study describing the three planets was published this week in the journal Astronomy Astrophysics.生物学家找到数颗围绕着长蛇座M矮星GJ 357经营的系外行星,系从外行星所说的是围绕太阳系外行星经营的行星。这颗行星的温度比太阳光较低40%,品质和容积仅有太阳光的三分之一上下。

一项描述这三颗行星的科学研究这周公布发布在《天文学与天体物理学》刊物上。The first exoplanet discovered around the star was GJ 357 b.生物学家寻找的第一架围绕这颗行星经营的系外行星是GJ 357 b。

The exoplanet is 22% larger and 80% more massive than Earth, making it a super-Earth. The researchers estimate that it has an average temperature of 490 degrees Fahrenheit. It completes one orbit around the star every 3.9 days.这颗系外行星容积比地球大22%,质量比地球低80%,使之沦落“非常地球”。科学研究工作人员估计它的均值温度为490华氏度(折合254℃)。这颗行星的公转周期为3.九天。

We describe GJ 357 b as a hot Earth, said Enric Pallé, study co-author and astrophysicist at the Institute of Astrophysics of the Canary Islands. Although it cannot host life, it is noteworthy as the third-nearest transiting exoplanet known to date and one of the best rocky planets we have for measuring the composition of any atmosphere it may possess.“大家将GJ 357 b描述为一个‘热地球’,”科学研究的合作方、加那利群岛天体物理研究室的星体科学家贝尼特斯·担心佩讲到。“虽然它没法支撑点生命,但特别注意的是,它是目前为止不明的‘第三短程’入境系从外行星,也是能够用于精确测量其具有的一切大气成分的最好岩质行星之一。”The researchers also discovered more signals of exoplanets in the system.科学研究工作人员仍在星球中找到更为多系外行星的数据信号。

GJ 357 d, a super-Earth that is 6.1 times the Earths mass, is the most intriguing because it orbits the star at a distance where the temperature might be just right to support liquid water on the surface.另一颗“非常地球”GJ357d的品质是地球的6.1倍,最令其科学研究工作人员很感兴趣,因为它围绕行星经营的间距使其表层的温度有可能正好合适液体的不会有。GJ 357 d is located within the outer edge of its stars habitable zone, where it receives about the same amount of stellar energy from its star as Mars does from the Sun, said Diana Kossakowski, study co-author at the Max Planck Institute for Astronomy. If the planet has a dense atmosphere, which will take future studies to determine, it could trap enough heat to warm the planet and allow liquid water on its surface.“GJ 357 d位于其行星宜居带上的外边沿,它从行星对接到的动能与火花从太阳光对接到的动能类似,”马克斯普朗克天文学研究室的科学研究年出版者戴安娜王妃·科萨科夫斯基讲到。“假如这颗行星有聚集的地球大气层,它很有可能会捕获充裕的发热量使本身气候问题,表层就可以留存液体,而否不会有地球大气层还务必更进一步科学研究。

”The researchers dont know if the super-Earth is rocky like our own planet, but it orbits the star every 55.7 days and has a temperature of negative 64 degrees Fahrenheit. An atmosphere could cause it to be warmer.生物学家行远必自不准确这颗“非常地球”否和地球一样属于岩质行星,但它的公转周期为55.七天,温度为零下64华氏度。假如行星上面有地球大气层,温度不容易高些。



This is exciting, as this is humanitys first nearby super-Earth that could harbor life -- uncovered with help from TESS, said Lisa Kaltenegger, study author, associate professor of astronomy and director of Cornells Carl Sagan Institute. With a thick atmosphere, the planet GJ 357 d could maintain liquid water on its surface like Earth and we could pick out signs of life with upcoming telescopes soon to be online.调查报告的编写人、天文学副教授职称、宾夕法尼亚大学梅帝·萨根研究室优点莉萨·柯廷福讲到:“这很令人激动,由于它是人们在TESS的帮助下寻找的第一颗有可能不会有生命的近距‘非常地球’。假如不会有聚集的地球大气层,行星GJ357 d有可能像地球一样表层可留存液体,大家或许能够根据即将发布的望眼镜找寻生命的征兆。

If GJ 357 d were to show signs of life, it would be at the top of everyones travel list—and we could answer a 1,000-year-old question on whether we are alone in the cosmos.“假如GJ 357 d行星上面有生命征兆,它将沦落每一个人旅游报表上的第一到达站,哪个并发症大家数千年的难题或许也将找答案,哪个难题便是:人们是否宇宙空间中唯一不会有的生命。”In the middle of those two planets is GJ 357 c. Its 3.4 times the mass of Earth and zips around the planet every 9.1 days, reaching a temperature of 260 degrees Fahrenheit.行星GJ357 c位于这二颗行星正中间,品质是地球的3.4倍,公转周期为9.1天,温度超出260华氏度。



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