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(huì)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(yùn)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(yùn)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(yùn)行到觀測點(diǎn)與其恒星之間時(shí)對(duì)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(dá)到了每小時(shí)22000英里。不過，我們大可不必?fù)?dān)心這顆星球很快就會(huì)消失，據(jù)目前最準(zhǔn)確的估計(jì)，這顆行星完全蒸發(fā)得花1萬億年的時(shí)間。