【科学60秒】蒸发中的伪"扫把星"_英语听力练习mp3下载-科学-沪江听力酷

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【科学60秒】蒸发中的伪"扫把星"

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Whaddya get when you cross a planet with a comet? Well, HD 209458 b looks like a candidate. It’s a gas giant planet also called Osiris, and it’s orbiting so close to its star that some of its atmosphere ___1___ by the stellar wind. Astronomers think that it may then have a tail like a comet’s.
The researchers studied the ___2___ object using the Hubble Space Telescope and reported their finding in the July 10th issue of The Astrophysical Journal.
The planet is about 153 light-years from Earth, and weighs a bit less than Jupiter. But its zippy orbit is a hundred times closer to its star than Jupiter’s is.
Astronomers got information about the planet by observing its effect on its star’s light ___3___. They found that most of the gas ___4___ from the planet by its star was moving at 22,000 miles per hour. But don’t worry about the planet disappearing entirely any time soon. The current best estimate to ___5___: a trillion years.