The recent discovery of numerous extrasolar planets confirms that our solar system is not unique 從最近發(fā)現(xiàn)的大量太陽系以外的行星,可以確定我們的太陽系并非獨一無二的。
So say three teams of scientists who used the spitzer space telescope to capture the light spectrum of two known extrasolar planets 三支科學(xué)家小組用“斯必擇”空間望遠鏡捕獲了兩個已知的太陽系外行星的光譜。
Gives overview of the solar system , the milky way galaxy , extrasolar planets , cosmology and astrophotography . includes images , additional resources , and forums -站點設(shè)立于廣西柳州,內(nèi)容包含天文知識,圖片欣賞,宇宙生物探討課題,同時包含論壇交流服務(wù)。
With some 50 extrasolar planets under their belt astronomers have to announce something really strange to get anyone ' s attention . last week they did just that 現(xiàn)在天文學(xué)家已經(jīng)在太陽系之外發(fā)現(xiàn)了50多顆行星,他們只有發(fā)現(xiàn)一些真正奇怪的東西才能吸引人們的注意力。
Studying these giant planets and their weird satellites helps us understand not only the formation of the solar system but also the planetary systems of extrasolar worlds 研究這些巨行星和它們千奇百怪的衛(wèi)星,將有助我們了解太陽系的形成過程,以至太陽系外其他的行星系統(tǒng)。
To accomplish this , scientists focused the telescope on two of the 14 extrasolar planets that are known to pass directly in front of their star when observed from earth 為實現(xiàn)這一目標,科學(xué)家將望遠鏡鎖定在14顆太陽系外行星中的兩顆上,這些行星是已知的從地球可以看到其直接從它們的主星前面經(jīng)過的系外行星。
Three other extrasolar planets believed to be of rocky composition have been reported , but they orbit a pulsar - the flashing corpse of an exploded star - rather than a normal type of star 之前人們曾報道過另外三顆據(jù)信由巖石組成的太陽系外行星,但是,它們是圍繞著一顆脈沖星(恒星爆發(fā)后遺留的發(fā)光的殘存物)運轉(zhuǎn)的,而不是一顆常態(tài)的恒星。
But starting with the 1995 discovery of the first extrasolar planet a gassy monster like jupiter but orbiting seven times as close to its star as mercury orbits around our sun each new find has seemed stranger than the last 但1995年發(fā)現(xiàn)了第一顆太陽系之外的行星一顆像木星一樣的巨大氣態(tài)星球,它圍繞自己的母星運行的距離比水星繞著太陽運行時的距離還近7倍。
For example , if there is a planet orbiting around the neutron star , it will wobble a little and the pulses will come a little early or late . we can then deduce the mass and the radius of the orbit of the planet from the arrival time of the pulses . this is how the first extrasolar planet is discovered 例如假若有一顆行星圍繞一顆中子星運行,它會令中子星出現(xiàn)搖動,引致脈沖的間隔變長或短,由此我們根據(jù)脈沖周期的變化,可推斷出行星的質(zhì)量和軌道半徑,這亦是天文學(xué)家找出第一顆地外行星時所用的方法。