First ’exomoon’ may have been found

天文学家首次发现太阳系外也有“月球”的证据
时间:2018-10-06 单词数:2380

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导读:美国天文学家首次发现强有力证据,表明太阳系外也存在“月球”——围绕行星的卫星。它距地球约8000光年,围绕一个巨大的气态行星旋转。

太阳系外的月球_英语新闻

Astronomers have announced the possible discovery of the first known moon outside our Solar System.

天文学家宣布,可能在我们的太阳系外发现了第一颗已知的月球。

This "exomoon" is not like any in our cosmic neighbourhood: it’s the size of Neptune and orbits a planet the size of Jupiter - but with 10 times the mass.

这颗“系外月球”与我们宇宙里的任何东西都不同:它的体积有海王星那么大,绕着一颗木星大小的行星运行 - 但这颗行星的质量是木星的10倍。

The object was spotted in data from Nasa’s Kepler spacecraft, and later observed using the Hubble telescope.

该物体被纳入美国宇航局开普勒太空船的数据后,天文学家使用哈勃望远镜进行了观测。

Astronomers David Kipping and Alex Teachey have published their results in Science Advances journal.

天文学家David Kipping和Alex Teachey已将他们的成果发表在《Science Advances》杂志上。

But they say that further observations are needed to understand the distant planetary system.

但是他们说需要进一步的观察才能理解这个遥远的行星系统。

"We’ve tried our best to rule out other possibilities such as spacecraft anomalies, other planets in the system or stellar activity, but we’re unable to find any other single hypothesis which can explain all of the data we have," said Dr Kipping, from Columbia University in New York.

“我们对所观测到的现象已尽力排除其他可能性,如航天器异常,太阳系中的其他行星或恒星活动,但我们无法找到任何其他单一假设来解释我们我们的数据,”来自纽约哥伦比亚大学的Kipping博士说。

To date, astronomers have discovered more than 3,500 exoplanets - worlds orbiting stars other than the Sun.

迄今为止,天文学家已发现超过3500颗系外行星 - 即环绕除太阳以外运行的星体。

A hunt for exomoons - bodies that orbit these distant planets - has proceeded in parallel. But so far, these natural satellites have lingered at the limits of detection with current techniques.

天文学家也在同时寻找“系外月球” - 即围绕遥远行星的星体。但到目前为止,这些天然星体很难被现有技术的探测到。

The researchers monitored a planet known as Kepler 1625b as it passed in front of its parent star.

这颗被命名为Kepler 1625b的星体在环绕其母星运行的时候,研究人员对其进行了监测。

This 19-hour event, known as a transit, blocked out some of the light coming from the star, which lies at a distance of 8,000 light-years from Earth.

这个19小时的活动,被称为“过境”,它阻挡了来自恒星的一些光线,而这颗恒星距离地球有8000光年。

来源:BBC爱语吧作者:Sylvia

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