作者Gwaewluin (神无月 孝臣)
看板sky
标题Re: IAU GA 2006 草案决议
时间Fri Aug 25 11:10:58 2006
稍微整理了一下
草案：
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5A
The IAU therefore resolves that planets and other bodies in our Solar System
be defined into three distinct categories in the following way:
(1) A planet is a celestial body that (a) is in orbit around the Sun, (b)
has sufficient mass for its self-gravity to overcome rigid body forces so
that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has
cleared the neighbourhood around its orbit.
行星：
(a)要绕着太阳旋转
(b)要有足够的质量使自身的重力可和刚体的力维持流体静力平衡（也就是要接近圆形）
(c)有能力能清除其轨道附近其他物体的天体
(2) A dwarf planet is a celestial body that (a) is in orbit around the Sun,
(b) has sufficient mass for its self-gravity to overcome rigid body forces so
that it assumes a hydrostatic equilibrium (nearly round) shape2, (c) has not
cleared the neighbourhood around its orbit, and (d) is not a satellite.
矮行星：
(a)要绕着太阳旋转
(b)要有足够的质量使自身的重力可和刚体的力维持流体静力平衡（也就是要接近圆形）
(c)没有能力能清除其轨道附近其他物体的天体
(d)不是个卫星
(3) All other objects orbiting the Sun shall be referred to collectively as
"Small Solar System Bodies".
其他绕太阳旋转的则称为Small Solar System Bodies（太阳系小天体吧）
5B
Insert the word "classical" before the word "planet" in Resolution 5A,
Section (1), and footnote . Thus reading:
(1) A classical planet is a celestial body . . .
在第一草案的行星前加入classical一字（应该是翻做经典）
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决议：
==============================================================================
The IAU members gathered at the 2006 General Assembly agreed that a "planet"
is defined as a celestial body that (a) is in orbit around the Sun, (b) has
sufficient mass for its self-gravity to overcome rigid body forces so that it
assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared
the neighbourhood around its orbit.
This means that the Solar System consists of eight "planets" Mercury, Venus,
Earth, Mars, Jupiter, Saturn, Uranus and Neptune. A new distinct class of
objects called "dwarf planets" was also decided. It was agreed that "planets"
and "dwarf planets" are two distinct classes of objects. The first members of
the "dwarf planet" category are Ceres, Pluto and 2003 UB313 (temporary name).
More "dwarf planets" are expected to be announced by the IAU in the coming
months and years. Currently a dozen candidate "dwarf planets" are listed on
IAU's "dwarf planet" watchlist, which keeps changing as new objects are found
and the physics of the existing candidates becomes better known.
The "dwarf planet" Pluto is recognised as an important proto-type of a new
class of trans-Neptunian objects. The IAU will set up a process to name these
objects.
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5A通过，但是5B则没有通过
於是太阳系只剩下八大行星：
水星、金星、地球、火星、木星、土星、天王星、海王星
而依照此定义的第一批矮行星则有了三个：
谷神星、冥王星、2003 UB313（也就是Xena）
而IAU将会继续定出更多的矮行星出来，并且设定一个命名程序
八大行星应该不会再变了
矮行星应该会愈变愈多
--
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that deserve life. Can you give that to them? Then be not too eager to deal out
death in the name of justice, fearing for your own safty. Even the wise cannot
see all ends.
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◆ From: 140.120.25.235
1F：推 divergent:推一个 请问可以借转个人版吗?? 08/25 11:47
2F：→ Gwaewluin:请 08/25 11:48
3F：推 hoseumou:侏儒行星里没有看到夏隆 所以他还是冥王星的卫星是吗?? 08/25 11:49
4F：→ Gwaewluin:我自己的猜测也是这样啦 08/25 11:58
5F：推 burdette:c的翻译法好像不太对 08/25 12:00
6F：推 mpcb:5A c 翻错 08/25 12:21
7F：推 Gwaewluin:不好意思，请问正确的翻译为？ 08/25 12:27
8F：→ mpcb:你要不要翻一下前面美联社的新闻... 08/25 12:43
9F：推 burdette:也许是:其运行轨道与周围卫星轨道范围清楚区分 08/25 13:50
10F：推 ccc73123:5A c天文馆的翻译 (c) 清除了轨道邻近区域中的物质 08/25 15:52