¿¼ÊÔ,ÆÀ¼Û
![]() ![]() |
|
з¢ÏÖ£ºÓпÅÀàµØÐÐÐÇÊÊÒËÉúÎï´æ»î | |
×÷Õߣºmaisie ÎÄÕÂÀ´Ô´£º±¾Õ¾Ô´´ µã»÷Êý ¸üÐÂʱ¼ä£º2010-10-8 16:23:09 ÎÄÕ¼È룺maisie ÔðÈα༣ºmaisie | |
|
|
[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ 2p8^pM1k{i([,N&[FroG] з¢ÏÖ£ºÓпÅÀàµØÐÐÐÇÊÊÒËÉúÎï´æ»î[ÎÄÕÂÀ´×Ô:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ H7{H`/21U5mNDr06] [ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ €JZ2}Q3#CWV\_'NFroG] Ì«¿Õ̽Ë÷Ñо¿ÈËÔ±×î½ü·¢ÏÖÁËÒ»¿Å´óСÀàËÆµØÇòµÄÐÐÐÇ£¬Õâ¿ÅÐÐÐÇÎ§ÈÆÀëµØÇò20¹âÄêµÄÒ»¿ÅºãÐÇÔËת£¬Æä±íÃæÎ¶ÈÊÊÒ˲úÉúҺ̬ˮԴ£¬Òò¶øºÜÓпÉÄÜÊÇÁíÒ»¸öÊʺÏÉúÎï´æ»îµÄÐÇÇò¡£¾ÝÑо¿ÈËÔ±½éÉÜ£¬Õâ¿Å±»ÃüÃûΪGliese[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ 4h3TDs@3{=T' FroG] Astronomers have discovered a potentially habitable planet of similar size to Earth in orbit around a nearby star.[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ B#Ml]aR=Xak/mFroG] A team of planet hunters spotted the alien world circling a red dwarf star called Gliese 581, 20 light years away.[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ p.9~N|5x=8V="^D4FroG] The planet is in the "Goldilocks zone" of space around a star where surface temperatures are neither too hot nor too cold for liquid water to form.[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ 9\dh=y~X)WB2EyKFroG] "Our findings offer a very compelling case for a potentially habitable planet," said Steven Vogt, an astronomer at the[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ fUbdA{pZLk?-/djavFroG] If confirmed, the planet would be the most Earth-like that has ever been discovered in another solar system and the first strong contender for a habitable one.[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ B@B?gKcF7Q{F:5:^FroG] More than 400 exoplanets have been discovered by astronomers, but most are gas giants, like Jupiter, that would be inhospitable to life as we know it.[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ J}Tm? $;88pdNw!-_FroG] Astronomers used the Keck telescope in[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ bB ELGZi\?A`e]FroG] One of the planets, named Gliese[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ B\6_w3H+2A~pbmxFroG] Unlike the previously discovered planets, Gliese[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ Geqtj(I+/9s]jI=FroG] One side of the planet is always facing the star, much as one side of the moon constantly faces Earth. This means that the far side of the planet is constantly in darkness. The most habitable region of the planet would be the line between the light and dark regions.[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ %$5Q}:dn\_'Y]j/FroG] "Any emerging life forms would have a wide range of stable climates to choose from and to evolve around, depending on their longitude," Vogt said.[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ vU7JB?,p]fp.;:@D€2FroG] The average temperature on the planet is estimated to be between -31 to[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ =/;(W b9xuh#e]oFroG] "The number of systems with potentially habitable planets is probably on the order of 10 or 20 percent, and when you multiply that by the hundreds of billions of stars in the Milky Way, that's a large number. There could be tens of billions of these systems in our galaxy," said Vogt.[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ %=gHU7d5qbu8#KVFroG] [ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ {))er!H ,UxKSW&FroG] |
|
![]() ![]() |