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(单词翻译)
This is Scientific American’s 60-Second Science. I’m Christopher Intagliata. Got a minute?
Astronomers1 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 HIP2 13044—or Sergio, for Star of Extra-Galactic Origin. It’s in what once was a separate galaxy3, which the Milky4 Way gobbled up billions of years ago.
The scientists saw Sergio wobbling due to the gravitational tug5 of a Jupiter-sized gas planet, which the scientists dubbed6 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 jibe7 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.
Thanks for the minute. For Scientific American’s 60-Second Science, I’m Christopher Intagliata
1 astronomers | |
n.天文学者,天文学家( astronomer的名词复数 ) | |
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2 hip | |
n.臀部,髋;屋脊 | |
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3 galaxy | |
n.星系;银河系;一群(杰出或著名的人物) | |
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4 milky | |
adj.牛奶的,多奶的;乳白色的 | |
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5 tug | |
v.用力拖(或拉);苦干;n.拖;苦干;拖船 | |
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6 dubbed | |
v.给…起绰号( dub的过去式和过去分词 );把…称为;配音;复制 | |
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7 jibe | |
v.嘲笑,与...一致,使转向;n.嘲笑,嘲弄 | |
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