Re: IAU GA 2006 草案決議

看板sky作者時間19年前 (2006/08/25 18:02), 編輯推噓1(100)
留言1則, 1人參與, 最新討論串3/3 (看更多)
※ 引述《Gwaewluin.bbs@ptt.cc (神無月 孝臣)》之銘言: : 稍微整理了一下 : 草案: : ============================================================================= : 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)要繞著太陽旋轉 : (b)要有足夠的質量使自身的重力可和剛體的力維持流體靜力平衡(也就是要接近圓形) : (c)有能力能清除其軌道附近其他物體的天體 has cleared ?? 有點疑惑, 是說 1. 將附近星體直接吸納近行星本體 或 捕獲當成其衛星, 應該是這 兩重意義吧?!而且還是用完成式的, 表示是要已經清掉了才算?! -- ※ 發信站: 深太空九號(ds9.twbbs.org) ◆ From: 140.109.112.59

08/26 03:01, , 1F
沒錯 所以穀神星不算行星 因為他沒清掉小行星帶的天體
08/26 03:01, 1F
文章代碼(AID): #14xig-00 (sky)
文章代碼(AID): #14xig-00 (sky)