天文學(xué)家已經(jīng)發(fā)現(xiàn)了數(shù)以百計(jì)的太陽系外行星。但是，現(xiàn)在該給新成員騰讓地方了，這顆行星圍繞著某顆恒星旋轉(zhuǎn)，用事實(shí)證明了傳統(tǒng)理論可不完全正確。
開頭：Astronomers have already…
結(jié)尾：…back then with an update.
Astronomers have already discovered hundreds of exoplanets. But make way for the new kid. Which is orbiting a kind of star that models say it shouldn’t. Researchers found the exoplanet while looking at the star HIP 13044 — or Sergio, for Star of Extra-Galactic Origin. It’s in what once was a separate galaxy, which the Milky Way gobbled up billions of years ago. The scientists saw Sergio wobbling due to the gravitational tug of a Jupiter-sized gas planet, which the scientists dubbed Sergio Junior. They detail their find in the journal Science. You don’t ordinarily find planets hanging around a star like Sergio. First, it's really old — past the Red Giant phase, when stars balloon in size and swallow up planets in close orbits. And planets tend to form around metal-rich stars, like our Sun. But Sergio has only one percent the metal content of our Sun. That doesn't jibe with one widely accepted model of planetary formation. The Sergios may offer a glimpse of the future of our own planetary system — in about five billion years. We hope to be back then with an update.
天文學(xué)家已發(fā)現(xiàn)了數(shù)以百計(jì)的太陽系外行星。但是，現(xiàn)在該給新成員騰讓地方了，這顆行星圍繞著某顆恒星旋轉(zhuǎn)，用事實(shí)證明了傳統(tǒng)理論可不完全正確。 研究人員是在研究HIP 13044恒星的時(shí)候發(fā)現(xiàn)了這顆太陽系外行星。恒星HIP 13044 又名Sergio（塞爾吉奧），取“在銀河系外起源的恒星”之意。它在曾經(jīng)是一個(gè)獨(dú)立的星系，在幾十億年前被銀河系吞并了。 科學(xué)家們觀察到Sergio（塞爾吉奧）由于受到一個(gè)木星大小的氣態(tài)行星造成的引力而變得不穩(wěn)定，科學(xué)家將這顆氣態(tài)行星戲稱為Sergio（塞爾吉奧）二世。他們在《科學(xué)》雜志上詳細(xì)敘述了自己的發(fā)現(xiàn)。 通常，你不會在如Sergio（塞爾吉奧）這樣的恒星周圍發(fā)現(xiàn)行星。首先，它非常非常老了——它經(jīng)歷過紅巨星階段，這一階段的恒星會急劇膨脹，吞噬在臨近軌道運(yùn)行的行星。而行星往往會在富含金屬的恒星——好似我們的太陽這種恒星——周圍形成?？蒘ergio（塞爾吉奧）的金屬含量只有太陽的百分之一。這種情況跟一個(gè)被廣泛接受的行星形成模型并不一致。 Sergios（塞爾吉奧）或許可以讓我們一窺自己的行星系統(tǒng)——大約50億年后的未來。到那時(shí)候，我們希望還能回來再更新節(jié)目給大家。