first near-Earth-size planet orbiting in the

第一顆跟地球的大小相似的星球圍繞著

habitable zone of a star very similar to our Sun.

一顆與太陽相似，位於適居帶內的行星

Located about 1,400 light-years from Earth in the

距離地球約1400光年

constellation of Cygnus, the newly discovered

位於天鵝座，這個新發現的

planet resides in the Kepler-452 system.

星球位於開普勒452體系裡。

The planet, called Kepler-452B, is about

名為開普勒452B這個星球的

60 percent larger than Earth.

體積比地球大百分之60

While its mass and composition are not known,

目前暫不清楚這個行星的成分

researchers believe that it is likely

但研究者覺得這星球很可能

to be a rocky world.

是岩石構造。

The host star of Kepler-452B is the same

開普勒452B的恆星

G-type as our Sun.

跟我們的太陽屬於同一等級：G type

It is 6 billion years old, 1.5 billion years older

開普勒452B的年齡已有60億歲，比太陽還長15億年

than our Sun and is 10 percent larger and

比地球還大百分之10

20 percent brighter.

以及比地球還亮百分之20

Kepler-452B receives only 10 percent more energy

開普勒452B從恆星接受的力量

from its star than the Earth does from the Sun.

比起地球只多百分之10

Since the Kepler mission was launched in 2009,

2009年發射的開普勒望任務

it has identified 4,696 planet candidates,

到目前為止已經鑒定4,696顆行星候選者，

one thousand of which have been confirmed as planets.

確認了1000多顆成為行星

Of those confirmed, 12 are near-Earth-size and in

再這些行星中，12顆有地球的大小

the habitable zone of their star.

於適恆星居帶內裡

The mission has provided data that has helped to

開普勒任務提供豐富的數據讓我們

redefine our understanding of stars and planetary systems in our galaxy.

對恆星與行星系更有瞭解

Researchers will use this data to continue to make

未來研究者會繼續用這數據

discoveries for years to come.

發現更多行星

(Electronic Sounds of Data) (Musical Tones)

(音樂)