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HD209458b

HD209458b

HD209458b

HD209458b

1

The planet , called HD209458b, passes in front of the Earth every three -and-a-half days, making accurate measurements possible over time .

这颗行星称为 HD209458b ，每三天半经过地球一次，因此，人们可以连续多次进行准确测量。

2

Hydrodynamic loss would also explain why astronomers find no large planets much closer to their stars than HD 209458b is.

流体动力散逸也能解释，为什麽天文学家无法在 HD209458b 的轨道之内找到大型行星。

3

In fact , astronomers have seen the telltale signs of hydrodynamic escape outside the solar system , on the Jupiter-like planet HD 209458b.

事实上，天文学家已经在太阳系外发现，类似木星的行星 HD209458b 有流体动力所造成的大气散逸的迹象。

4

As one example , a gas giant planet called HD 209458b has been found to contain oxygen , carbon and water .

举个例子，人们发现一颗被称为 HD209458b 的巨大的气体行星含有氧、碳和水。

5

HD 209458b, for example , was found with water, methane and carbon dioxide in its atmosphere, all key ingredients for life .

例如，在编号 HD209458b 的系外行星的大气层里就发现水、甲烷和二氧化碳的存在，这些都是孕育生命的关键元素。

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