[新闻]这是谁？
http://starfan.lamost.org/5000/usr/23/23_143.jpg 别担心——你不是惟一一个以为这是张漂亮的业余土星照片的人。土星是我们太阳系中
的光环之王！但是，再瞧瞧，亮度和周围的卫星位置也许有点儿陌生...并且，与行星
圆面相比，光环是否有些异常明亮了呢？好的，它不是土星。
它是哪颗行星？
【星语者频道】新闻
http://starfan.lamost.org/cgi-bin/starfan/forums.cgi?forum=23 是天王星吧！
是谁拍的？绝了！ 不会吧！天王星的光环也太亮了吧！而且它的卫星也太玄了吧！哈勃的天王星照片： 还有照片上卫星如此之亮，太不可思议了。
哦！原來是VLT拍的
怪不得啦，不要死想著業餘拍的。 这不是木星吗！怎么大家都不知道呢？这四颗卫星是木星最明显的标志。 是在可见光波段上拍的么？
錯，是天王星
木星的環比天王星暗而細長.....而且你看過南歐天文台新聞就無話可信般相信了。Don't worry - you are not the only one who thought this was a nice amateur photo of planet Saturn, Lord of the Rings in our Solar System!
But then the relative brightness and positions of the moons may appear somewhat unfamiliar... and the ring system does look unusually bright when compared to the planetary disk...??
Well, it is not Saturn, but Uranus, the next giant planet further out, located at a distance of about 3,000 million km, or 20 times the distance between the Sun and the Earth.
The photo shows Uranus surrounded by its rings and some of the moons, as they appear on a near-infrared image that was obtained in the Ks-band (at wavelength 2.2 µm) with the ISAAC multi-mode instrument on the 8.2-m VLT ANTU telescope at the ESO Paranal Observatory (Chile). The exposure was made on November 19, 2002 (03:00 hrs UT) during a planetary research programme. The observing conditions were excellent (seeing 0.5 arcsec) and the exposure lasted 5 min. The angular diameter of Uranus is about 3.5 arcsec.
The observers at ISAAC were Emmanuel Lellouch and Thérése Encrenaz of the Observatoire de Paris (France) and Jean-Gabriel Cuby and Andreas Jaunsen (both ESO-Chile). 如果叫我判断,这肯定不是木星和土星.木星的光环比煤碳还黑.只有空间探测器在逼近木星时才能见到.大星与小星的大小比例也不对.土星的卫星也没这么亮这么大.所以,我只能判断出那几颗小星是恒星,至于那大星是天王星就不得而知了.
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