在线国产一区二区_成人黄色片在线观看_国产成人免费_日韩精品免费在线视频_亚洲精品美女久久_欧美一级免费在线观看

  Home>index
       
 

Scientists discover 10th planet's moon
(AP)
Updated: 2005-10-02 09:11

LOS ANGELES - The astronomers who claim to have discovered the 10th planet in the solar system have another intriguing announcement: It has a moon.

While observing the new, so-called planet from Hawaii last month, a team of astronomers led by Michael Brown of the California Institute of Technology spotted a faint object trailing next to it.

Because it was moving, astronomers ruled it was a moon and not a background star, which is stationary.

The moon discovery is important because it can help scientists determine the new planet's mass. In July, Brown announced the discovery of an icy, rocky object larger than Pluto in the Kuiper Belt, a disc of icy bodies beyond Neptune. Brown labeled the object a planet and nicknamed it Xena after the lead character in the former TV series "Xena: Warrior Princess." The moon was nicknamed Gabrielle, after Xena's faithful traveling sidekick.

By determining the moon's distance and orbit around Xena, scientists can calculate how heavy Xena is. For example, the faster a moon goes around a planet, the more massive a planet is.

But the discovery of the moon is not likely to quell debate about what exactly makes a planet. The problem is there is no official definition for a planet and setting standards like size limits potentially invites other objects to take the "planet" label.

Possessing a moon is not a criteria of planethood since Mercury and Venus are moonless planets. Brown said he expected to find a moon orbiting Xena because many Kuiper Belt objects are paired with moons.
Page: 12



Shenzhou VI blasts off into sky
Celebrating Chongyang Festival
Astronauts for Shenzhou VI to be selected
  Today's Top News     Top China News
 

Second manned spacecraft successfully takes off

 

   
 

Next goals: Permanent space lab, and moon

 

   
 

AP: Chinese crew starts space mission

 

   
 

Reuters: Countdown to 2nd manned space trip

 

   
 

CPC sets blueprint for next five years

 

   
 

Chinese rescuers in Pakistan offer hope

 

   
  Many ministries misused funds, report says
   
  China approves new five-year economic plan
   
  Premier: We'll do our best to help
   
  National standards for disposable chopsticks issued
   
  Snow urges China for more action on yuan
   
  Nuke power firm plans project in Hainan
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  Related Stories  
   
NASA plans to announce new class of planets
   
Simple telescopes discover new planet
   
Simple telescopes discover new planet
   
Stargazers ready for close encounter with Mars
   
Chinese restaurant renames after complaint from US restaurant chain
   
Nokia to promote 'Planet of the Apes' on cell phones
   
"Planet of the Apes" spins atop US box office
  News Talk  
  It is time to prepare for Beijing - 2008  
Advertisement
         
主站蜘蛛池模板: 日韩精品大片 | 青青草久久 | 国产不卡在线观看 | 涩五月婷婷 | 久久久久久久久久国产精品 | 久草免费在线视频 | 亚洲免费黄色 | 日韩欧美精品 | 午夜激情福利视频 | 亚洲天堂网在线观看 | 欧美黄色网 | 亚洲一级精品 | 久久r| 亚洲欧美精品一区二区 | 毛片av在线| 亚洲国产日韩在线 | 日韩精品久久久 | 日韩高清一区 | 成人欧美一区二区三区白人 | 黄色1级视频 | 特级丰满少妇一级aaaa爱毛片 | 中文字幕在线观看一区二区三区 | 三级黄色在线观看 | 亚洲视频一区在线观看 | 色黄大色黄女片免费中国 | 日本www在线观看 | 五月天在线 | 日韩精品免费 | 日日操夜夜骑 | 蜜桃成人av | 色妞网站| av香蕉| 韩日精品视频 | 在线a视频 | 91精品视频在线 | av免费在线播放 | 特一级黄色片 | 欧美一级艳片视频免费观看 | 欧美一级片在线播放 | 97视频在线免费观看 | 欧美亚洲国产日韩 |