科學(xué)60秒:蒸發(fā)中的偽"掃把星"
來源：滬江聽寫酷
2011-05-03 00:00
文章較難，大家聽寫填空即可~
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.
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.
gets blown away odd when it moved in front of the star from our point of view being driven away complete the vaporization
哪天你看到一顆貌似彗星的行星，那會是啥星呢？嗯，有可能是HD 209458 b哦。它是顆氣態(tài)大行星，也叫“歐西里斯”星。它的運行軌跡過于接近其恒星，致使它的部分大氣層被恒星吹起。天文學(xué)家們認(rèn)為這樣一來，這顆行星就像彗星一樣有了一條尾巴。 研究人員用哈勃太空望遠(yuǎn)鏡觀測了這顆奇特星球，并且將他們的發(fā)現(xiàn)發(fā)表在了《天文物理期刊》7月10日大事記中。 這顆行星距離地球約153光年，略輕于土星。不過它的運行軌道與其恒星之間的距離要比土星與其恒星之間的距離近100倍。 天文學(xué)家通過觀測當(dāng)它運行到觀測點與其恒星之間時對恒星的光的影響發(fā)現(xiàn)，這顆行星上大部分被其恒星吹起的氣體的流速達到了每小時22000英里。不過，我們大可不必?fù)?dān)心這顆星球很快就會消失，據(jù)目前最準(zhǔn)確的估計，這顆行星完全蒸發(fā)得花1萬億年的時間。
