Archive for the ‘ 太空宇宙 Space ’ Category
從小就學會太陽系有九大行星. 不過最近科學家要redefine星球的意思. 新的definition可能會導致很多本來小小的asteroid也會變成planet…. 太陽系除了現在的 Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto 之外, 可能會在火星木星中間多加 Ceres; Pluto的月亮Charon可能也分類為行星; Pluto後面再多加新行星Xena (2003 UB313) – 20060816planets.pdf 新的行星definition: Planet: A round thing orbiting a star. More precisely, according to the draft definition: “A planet is a celestial body that (a) has sufficient mass for its self-gravity to overcome rigid body [ READ MORE ]
On this day...
No posts on this day.
Archives
Click to support us