ct 发表于 2007-1-22 16:27:00

太阳最终会吞没地球？(组图)

<p>UploadFile/2007-1/20071221626486158.jpg<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 太阳</p><p>UploadFile/2007-1/200712216262552073.jpg<br/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 地球</p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; mso-char-indent-count: 2.0; mso-char-indent-size: 14.0pt;"><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">英国天文学家首次观察到，在非常遥远的星空中，有一颗棕矮星正与白矮星相伴而行，这一现象证明，这颗棕矮星并没有像科学界预测的那样被红巨星吞没，这对科学家预测太阳系行星未来的命运具有很大帮助，因为</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><font face="Times New Roman">50</font></span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">亿年后，当太阳走到生命尽头时，地球也将面临同样被吞没的命运。这一发现将发表在本周出版的英国《自然》杂志上。</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><p></p></span></p><p><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">据科学家推算，太阳的燃料尚可维持</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">50</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">亿年，</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">50</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">亿年后太阳将走到生命尽头。届时，太阳核心的温度将增加</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">4000</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">倍，体积增加数千倍，变成一颗红巨星。它将首先吞没水星，接着是金星，然后就是地球。科学家此前认为，在宇宙中，大小介于恒星与行星之间的棕矮星，当其恒星发生类似太阳的变化时，也同样无法避免被吞没的命运。</span></p>

ct 发表于 2007-1-22 16:31:00

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; mso-char-indent-count: 2.0; mso-char-indent-size: 14.0pt;"><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">英国科学家利用位于智利的天文望远镜观察到，编号为</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><font face="Times New Roman">WD0137</font></span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">－</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><font face="Times New Roman">349</font></span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">的棕矮星却奇迹般避免了被红巨星吞没的命运。据英国莱斯特大学天文学家马特</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><font face="Times New Roman">·</font></span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">伯利透露，这颗棕矮星的大小相当于太阳系的木星，质量为木星的</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><font face="Times New Roman">55</font></span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">倍，靠近一颗白矮星，其运行轨道非常小，与白矮星互转一圈仅需要</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><font face="Times New Roman">2</font></span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">个小时，轨道运行速度为每小时</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><font face="Times New Roman">80</font></span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">万公里。天文学家认为，此前这颗棕矮星与其恒星的距离，有可能相当于地球到太阳的距离。</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 28pt; mso-char-indent-count: 2.0; mso-char-indent-size: 14.0pt;"><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">伯利表示，这个发现引起了天文学家的兴趣，他们希望了解，太阳系外是否还有更小的星体能幸免于被红巨星吞没。但伯利认为，当太阳走到生命尽头时，地球恐怕难于逃脱被吞没的命运，这是由于地球的质量与棕矮星相比还是太小了，而木星届时能否幸存则难以推测。</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black;"><p></p></span></p><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">不过，由于这颗棕矮星与白矮星的距离非常近，根据爱因斯坦的相对论预测，两颗星之间的距离将会慢慢变小。赫特福德大学的阿尔夫认为，大约经过</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">14</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">亿年后，两星的轨道周期将缩短为</span><span lang="EN-US" style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">1</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">小时，届时由于两星相距过近，白矮星将像一个巨大的真空吸尘器一样，吸光其伴星的气体，最终，这颗棕矮星还是难逃白矮星带给它的灭顶之灾。据《科技日报》</span>

呆鸟 发表于 2007-1-24 20:05:00

这就好象说人会死亡一样

风之泪 发表于 2007-2-11 15:05:00

<p>不会呀</p><p>这么牛?</p>

fanyk709 发表于 2007-4-26 19:59:00

是不是也

小学徒 发表于 2007-6-7 23:16:00

不知道多少年后不会再有人类了,这是科学家说的`

落在半空的泪 发表于 2007-8-16 15:13:00

<p>反正到那一天，</p><p>&nbsp;&nbsp; 我已经不在了！~</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 所以不担心了！</p>

ssen663 发表于 2013-5-22 10:53:46

反正看不到了，不管了

157469305 发表于 2013-7-15 11:46:51

很遥远的事、、不用担心
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