美国宇航局发现“新地球”
<p><span word="A">A</span> <span word="planet">planet</span> <span word="more">more</span> <span word="like">like</span> <span word="Earth">Earth</span> <span word="than">than</span> <span word="any">any</span> <span word="yet">yet</span> <span word="discovered">discovered</span> <span word="has">has</span> <span word="been">been</span> <span word="identified">identified</span> <span word="as">as</span> <span word="a">a</span> <span word="potential">potential</span> <span word="future">future</span> <span word="home">home</span> <span word="for">for</span> <span word="mankind">mankind</span>.</p><p><span word="Kepler">Kepler</span> 22<span word="b">b</span> <span word="contains">contains</span> <span word="both">both</span> <span word="land">land</span> <span word="and">and</span> <span word="water">water</span> <span word="and">and</span> <span word="has">has</span> <span word="temperatures">temperatures</span> <span word="which">which</span> <span word="average">average</span> <span word="around">around</span> 72 <span word="degrees">degrees</span> (22 <span word="Celsius">Celsius</span>).</p><p><span word="It">It</span> <span word="also">also</span> <span word="contains">contains</span> <span word="the">the</span> <span word="right">right</span> <span word="atmosphere">atmosphere</span> <span word="to">to</span> <span word="potentially">potentially</span> <span word="support">support</span> <span word="life">life</span>.</p><p><span word="It">It</span> <span word="is">is</span>, <span word="however">however</span>, 600 <span word="light">light</span> <span word="years">years</span> <span word="from">from</span> <span word="Earth">Earth</span>.</p><p><span word="The">The</span> <span word="planet">planet</span>, <span word="where">where</span> <span word="a">a</span> <span word="year">year</span> <span word="lasts">lasts</span> 290 <span word="days">days</span>, <span word="was">was</span> <span word="first">first</span> <span word="spotted">spotted</span> <span word="two">two</span> <span word="years">years</span> <span word="ago">ago</span>.</p>
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