太阳系是由受太阳引力约束的天体组成的系统，它的最大范围约可延伸到1光年以外。太阳系的主要成员有：太阳（恒星）、八大行星（包括地球）、无数小行星、众多卫星（包括月亮），还有彗星、流星体以及大量尘埃物质和稀薄的气态物质.在太阳系中，太阳的质量占太阳系总质量的99.8%，其它天体的总和不到有太阳的0.2%。太阳是中心天体，它的引力控制着整个太阳系，使其它天体绕太阳公转，太阳系中的九大行星（水星、金星、地球、火星、木星、土星、天王星、海王星）都在接近同一平面的近圆轨道上，朝同一方向绕太阳公转。
距离(AU) 半径(地球) 质量(地球) 轨道倾角(度) 轨道 偏心率 倾斜度 密度(g/cm3)
太阳 0 109 332,800 --- --- --- 1.410
水星 0.39 0.38 0.05 7 0.2056 0.1° 5.43
金星 0.72 0.95 0.89 3.394 0.0068 177.4° 5.25
地球 1.0 1.00 1.00 0.000 0.0167 23.45° 5.52
火星 1.5 0.53 0.11 1.850 0.0934 25.19° 3.95
木星 5.2 11.0 318 1.308 0.0483 3.12° 1.33
土星 9.5 9.5 95 2.488 0.0560 26.73° 0.69
天王星 19.2 4.0 17 0.774 0.0461 97.86° 1.29
海王星 30.1 3.9 17 1.774 0.0097 29.56° 1.64
八大行星中，一般把水星、金星、地球和火星称为类地行星，它们的共同特点是其主要由石质和铁质构成，半径和质量较小，但密度较高。把木星、土星、天王星和海王星称为类木行星，它们的共同特点是其主要由氢、氦、冰、甲烷、氨等构成，石质和铁质只占极小的比例，它们的质量和半径均远大于地球，但密度却较低。
远计算，行星到太阳的距离（用a表示）a=0.4+0.3*2n-2（天文单位）其中n表示由近到远第n个行星（详见上表） 地球、火星、木星、土星、天王星、海王星的自转周期为12小时到一天左右，但水星、金星自转周期很长，分别为58.65天、243天和6.387天，多数行星的自转方向和公转方向相同，但金星则相反。 除了水星和金星，其它行星都有卫星绕转，构成卫星系。
在太阳系中，现已发现1600多颗彗星，大多数彗星是朝同一方向绕太阳公转，但也有逆向公转的。彗星绕太阳运行中呈现奇特的形状变化。 太阳系中还有数量众多的大小流星体，有些流星体是成群的，这些流星群是彗星瓦解的产物。大流星体降落到地面成为陨石。 太阳系是银河系的极微小部分，它只是银河系中上千亿个恒星中的一个，它离银河系中心约8.5千秒差距,即不到3万光年。太阳带着整个太阳系绕银河系中心转动。可见，太阳系不在宇宙中心，也不在银河系中心。 太阳是50亿年前由星际云瓦解后的一团小云塌缩而成的，它的寿命约为100亿年。By the sun in the solar system by gravitational bound by the celestial bodies formed, to the maximum extent it can be extended to about 1 light-years away. The main members of the solar system: the sun (star), the eight planets (Earth), numerous asteroids, a large number of satellites (including the moon), comets, meteoroid and a large amount of dust material and thin gaseous material. In the solar system, the sun The quality of the solar system accounted for 99.8 percent of the total mass, and other celestial bodies are less than the sum of 0.2 percent of the sun. Sun is the Center for Astrophysics, which controls the gravity of the solar system as a whole, so that other celestial bodies around the sun, the solar system's nine planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) are close to the same plane near Circular orbit, in the same direction around the sun.
Distance (AU) radius (Earth) quality (Earth) orbit inclination angle (degrees) orbital eccentricity gradient density (g/cm3)
Sun 0 109 332,800 --- --- --- 1.410
Mercury 0.39 0.38 0.05 7 0.2056 0.1 ° 5.43
Venus 0.72 0.95 0.89 3.394 0.0068 177.4 ° 5.25
Earth 1.0 1.00 1.00 0.000 0.0167 23.45 ° 5.52
Mars 1.5 0.53 0.11 1.850 0.0934 25.19 ° 3.95
Jupiter 5.2 11.0 318 1.308 0.0483 3.12 ° 1.33
Saturn 9.5 9.5 95 2.488 0.0560 26.73 ° 0.69
Uranus 19.2 4.0 17 0.774 0.0461 97.86 ° 1.29
Neptune 30.1 3.9 17 1.774 0.0097 29.56 ° 1.64
Eight planets, the general Mercury, Venus, Earth and Mars as the terrestrial planets, their common feature is its stone and iron from the main structure, and quality of the smaller radius, but a higher density. The Jupiter, Saturn, Uranus and Neptune known as the Jovian planets, their common feature is mainly hydrogen, helium, ice, methane, ammonia, etc., stone and iron accounted for only a very small proportion of their quality And are much greater than the radius of the Earth, but the density is lower.
Long terms, the distance between planets to the sun (a use that) a = 0.4 +0.3 * 2n-2 (an astronomical unit) n one that is far from near to the first planet-n (see the table) of the Earth, Mars, Jupiter, Saturn , Uranus, Neptune's rotation period to 12 hours a day or so, Mercury, Venus's rotation period is very long, were 58.65 days, 243 days and 6.387 day, most of the planet's rotation and the direction of the revolution in the same direction, but Venus is the opposite. In addition to Mercury and Venus, other planets have Raozhuan satellite, the satellite system poses.
In the solar system, has now found more than 1600 comets, most of the comet is in the same direction around the sun, but there are also reverse the revolution. Comet around the Sun in the operation of a strange shape change. In the solar system are a large number of small meteoroids, and some groups of the meteoroid is, the meteor is the product of the collapse of the comet. Large meteoroid landed on the ground to become meteorites. The solar system is an insignificant part of the galaxy, the Milky Way that it is only in the 100,000,000,000 stars in one of its center of the Milky Way from the 1000 second gap of about 8.5, or less than 30,000 light-years. With the sun throughout the solar system rotating around the center of the Milky Way. Can be seen, not in the solar system center of the universe, not in the center of the Milky Way. The sun is 50 million years ago by the collapse of interstellar cloud after a mission Xiaoyun from the collapse of its life span is about 100 million years.
距离(AU) 半径(地球) 质量(地球) 轨道倾角(度) 轨道 偏心率 倾斜度 密度(g/cm3)
太阳 0 109 332,800 --- --- --- 1.410
水星 0.39 0.38 0.05 7 0.2056 0.1° 5.43
金星 0.72 0.95 0.89 3.394 0.0068 177.4° 5.25
地球 1.0 1.00 1.00 0.000 0.0167 23.45° 5.52
火星 1.5 0.53 0.11 1.850 0.0934 25.19° 3.95
木星 5.2 11.0 318 1.308 0.0483 3.12° 1.33
土星 9.5 9.5 95 2.488 0.0560 26.73° 0.69
天王星 19.2 4.0 17 0.774 0.0461 97.86° 1.29
海王星 30.1 3.9 17 1.774 0.0097 29.56° 1.64
八大行星中，一般把水星、金星、地球和火星称为类地行星，它们的共同特点是其主要由石质和铁质构成，半径和质量较小，但密度较高。把木星、土星、天王星和海王星称为类木行星，它们的共同特点是其主要由氢、氦、冰、甲烷、氨等构成，石质和铁质只占极小的比例，它们的质量和半径均远大于地球，但密度却较低。
远计算，行星到太阳的距离（用a表示）a=0.4+0.3*2n-2（天文单位）其中n表示由近到远第n个行星（详见上表） 地球、火星、木星、土星、天王星、海王星的自转周期为12小时到一天左右，但水星、金星自转周期很长，分别为58.65天、243天和6.387天，多数行星的自转方向和公转方向相同，但金星则相反。 除了水星和金星，其它行星都有卫星绕转，构成卫星系。
在太阳系中，现已发现1600多颗彗星，大多数彗星是朝同一方向绕太阳公转，但也有逆向公转的。彗星绕太阳运行中呈现奇特的形状变化。 太阳系中还有数量众多的大小流星体，有些流星体是成群的，这些流星群是彗星瓦解的产物。大流星体降落到地面成为陨石。 太阳系是银河系的极微小部分，它只是银河系中上千亿个恒星中的一个，它离银河系中心约8.5千秒差距,即不到3万光年。太阳带着整个太阳系绕银河系中心转动。可见，太阳系不在宇宙中心，也不在银河系中心。 太阳是50亿年前由星际云瓦解后的一团小云塌缩而成的，它的寿命约为100亿年。By the sun in the solar system by gravitational bound by the celestial bodies formed, to the maximum extent it can be extended to about 1 light-years away. The main members of the solar system: the sun (star), the eight planets (Earth), numerous asteroids, a large number of satellites (including the moon), comets, meteoroid and a large amount of dust material and thin gaseous material. In the solar system, the sun The quality of the solar system accounted for 99.8 percent of the total mass, and other celestial bodies are less than the sum of 0.2 percent of the sun. Sun is the Center for Astrophysics, which controls the gravity of the solar system as a whole, so that other celestial bodies around the sun, the solar system's nine planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) are close to the same plane near Circular orbit, in the same direction around the sun.
Distance (AU) radius (Earth) quality (Earth) orbit inclination angle (degrees) orbital eccentricity gradient density (g/cm3)
Sun 0 109 332,800 --- --- --- 1.410
Mercury 0.39 0.38 0.05 7 0.2056 0.1 ° 5.43
Venus 0.72 0.95 0.89 3.394 0.0068 177.4 ° 5.25
Earth 1.0 1.00 1.00 0.000 0.0167 23.45 ° 5.52
Mars 1.5 0.53 0.11 1.850 0.0934 25.19 ° 3.95
Jupiter 5.2 11.0 318 1.308 0.0483 3.12 ° 1.33
Saturn 9.5 9.5 95 2.488 0.0560 26.73 ° 0.69
Uranus 19.2 4.0 17 0.774 0.0461 97.86 ° 1.29
Neptune 30.1 3.9 17 1.774 0.0097 29.56 ° 1.64
Eight planets, the general Mercury, Venus, Earth and Mars as the terrestrial planets, their common feature is its stone and iron from the main structure, and quality of the smaller radius, but a higher density. The Jupiter, Saturn, Uranus and Neptune known as the Jovian planets, their common feature is mainly hydrogen, helium, ice, methane, ammonia, etc., stone and iron accounted for only a very small proportion of their quality And are much greater than the radius of the Earth, but the density is lower.
Long terms, the distance between planets to the sun (a use that) a = 0.4 +0.3 * 2n-2 (an astronomical unit) n one that is far from near to the first planet-n (see the table) of the Earth, Mars, Jupiter, Saturn , Uranus, Neptune's rotation period to 12 hours a day or so, Mercury, Venus's rotation period is very long, were 58.65 days, 243 days and 6.387 day, most of the planet's rotation and the direction of the revolution in the same direction, but Venus is the opposite. In addition to Mercury and Venus, other planets have Raozhuan satellite, the satellite system poses.
In the solar system, has now found more than 1600 comets, most of the comet is in the same direction around the sun, but there are also reverse the revolution. Comet around the Sun in the operation of a strange shape change. In the solar system are a large number of small meteoroids, and some groups of the meteoroid is, the meteor is the product of the collapse of the comet. Large meteoroid landed on the ground to become meteorites. The solar system is an insignificant part of the galaxy, the Milky Way that it is only in the 100,000,000,000 stars in one of its center of the Milky Way from the 1000 second gap of about 8.5, or less than 30,000 light-years. With the sun throughout the solar system rotating around the center of the Milky Way. Can be seen, not in the solar system center of the universe, not in the center of the Milky Way. The sun is 50 million years ago by the collapse of interstellar cloud after a mission Xiaoyun from the collapse of its life span is about 100 million years.
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第1个回答 2008-12-04
MERCURY水星,VENUS金星,EARTH地球,MARS火星,JUPITER木星,SATURN土星,URANUS天王星,NEPTUNE海王星,PLUTO冥王星
水星的英文名字Mercury来自罗马神墨丘利。符号是上面一个圆形下面一个交叉的短垂线和一个半圆形(Unicode: ?). 是墨丘利所拿魔杖的形状。在第5世纪，水星实际上被认为成二个不同的行星，这是因为它时常交替地出现在太阳的两侧。当它出现在傍晚时，它被叫做墨丘利；但是当它出现在早晨时，为了纪念太阳神阿波罗，它被称为阿波罗。毕达哥拉斯后来指出他们实际上是相同的一颗行星。中国古代则称水星为“辰星”。
中国古人称金星为“太白”或“太白金星”，也称“启明”或“长庚”。古希腊人称为阿佛洛狄特，是希腊神话中爱与美的女神。而在罗马神话中爱与美的女神是维纳斯，因此金星也称做“维纳斯”。金星的天文符号用维纳斯的梳妆镜来表示。金星的位相变化金星同月球一样，也具有周期性的圆缺变化（位相变化），但是由于金星距离地球太远，用肉眼是无法看出来的。关于金星的位相变化，曾经被伽利略作为证明哥白尼的日心说的有力证据。
地球是太阳系中行星之一，按离太阳由近及远的次序排列为第三。它是太阳系类地行星中最大的一颗，也是现代科学目前确证目前惟一存在生命的行星。行星年龄估计大约有45亿年(4.5×109)。在行星形成后不久，即捕获其惟一的天然卫星－月球。地球上惟一的智慧生物是人类。
因为它在夜空中看起来是血红色的,所以在西方，以罗马神话中的战神玛尔斯(或希腊神话对应的阿瑞斯)命名它。在古代中国，因为它荧荧如火，故称“荧惑”。火星有两颗小型天然卫星:火卫一Phobos和火卫二Deimos(阿瑞斯儿子们的名字)。两颗卫星都很小而且形状奇特，可能是被引力捕获的小行星。英文里前缀areo-指的就是火星。
木星是太阳系九大行星之一，按离太阳由近及远的次序排列为第五颗。它也是太阳系最大的行星，自转最快的行星。中国古代用它来纪年，因而称为岁星。
在西方称它为朱庇特，是罗马神话中的众神之王，相当于希腊神话中的宙斯。
土星是一个巨型气体行星,是太阳系中仅次于木星的第二大行星。土星的英文名字Saturn（以及其他绝大部分欧洲语言中的土星名称）是以罗马神的农神萨杜恩命名的。中国古代称之为镇星或填星。
天王星是太阳系的九大行星之一，排列在土星外侧、海王星内侧而名列第七，颜色为灰蓝色，是一颗巨型气体行星(Gas Giant)。以直径计算，天王星是太阳系第三大行星；但若以质量计算，则比海王星轻而排行第四。天王星的命名，是取自希腊神话的天神乌拉诺斯。
海王星为太阳系九大行星中的第八个，是一个巨行星。海王星是第一个通过天体力学计算后被发现的行星。因为天王星的轨道与计算的不同，1845年约翰·可夫·亚当斯和埃班·勤维叶推算了在天王星外的一个未知行星可能的位置。1846年9月23日柏林天文台台长约翰·格弗里恩·盖尔真的在这个位置发现了一颗新的行星：海王星。
目前海王星是太阳系内离太阳第二远的行星。海王星的名字是罗马神话中的海神涅普顿（Neptune）。
冥王星是太阳系九大行星中离开太阳最远、最小的一颗行星，1930年被发现。因为它离太阳最远，因此也非常寒冷，这和罗马神话中的冥王普鲁托所住的地方很相似，因此称为“Pluto”。
水星的英文名字Mercury来自罗马神墨丘利。符号是上面一个圆形下面一个交叉的短垂线和一个半圆形(Unicode: ?). 是墨丘利所拿魔杖的形状。在第5世纪，水星实际上被认为成二个不同的行星，这是因为它时常交替地出现在太阳的两侧。当它出现在傍晚时，它被叫做墨丘利；但是当它出现在早晨时，为了纪念太阳神阿波罗，它被称为阿波罗。毕达哥拉斯后来指出他们实际上是相同的一颗行星。中国古代则称水星为“辰星”。
中国古人称金星为“太白”或“太白金星”，也称“启明”或“长庚”。古希腊人称为阿佛洛狄特，是希腊神话中爱与美的女神。而在罗马神话中爱与美的女神是维纳斯，因此金星也称做“维纳斯”。金星的天文符号用维纳斯的梳妆镜来表示。金星的位相变化金星同月球一样，也具有周期性的圆缺变化（位相变化），但是由于金星距离地球太远，用肉眼是无法看出来的。关于金星的位相变化，曾经被伽利略作为证明哥白尼的日心说的有力证据。
地球是太阳系中行星之一，按离太阳由近及远的次序排列为第三。它是太阳系类地行星中最大的一颗，也是现代科学目前确证目前惟一存在生命的行星。行星年龄估计大约有45亿年(4.5×109)。在行星形成后不久，即捕获其惟一的天然卫星－月球。地球上惟一的智慧生物是人类。
因为它在夜空中看起来是血红色的,所以在西方，以罗马神话中的战神玛尔斯(或希腊神话对应的阿瑞斯)命名它。在古代中国，因为它荧荧如火，故称“荧惑”。火星有两颗小型天然卫星:火卫一Phobos和火卫二Deimos(阿瑞斯儿子们的名字)。两颗卫星都很小而且形状奇特，可能是被引力捕获的小行星。英文里前缀areo-指的就是火星。
木星是太阳系九大行星之一，按离太阳由近及远的次序排列为第五颗。它也是太阳系最大的行星，自转最快的行星。中国古代用它来纪年，因而称为岁星。
在西方称它为朱庇特，是罗马神话中的众神之王，相当于希腊神话中的宙斯。
土星是一个巨型气体行星,是太阳系中仅次于木星的第二大行星。土星的英文名字Saturn（以及其他绝大部分欧洲语言中的土星名称）是以罗马神的农神萨杜恩命名的。中国古代称之为镇星或填星。
天王星是太阳系的九大行星之一，排列在土星外侧、海王星内侧而名列第七，颜色为灰蓝色，是一颗巨型气体行星(Gas Giant)。以直径计算，天王星是太阳系第三大行星；但若以质量计算，则比海王星轻而排行第四。天王星的命名，是取自希腊神话的天神乌拉诺斯。
海王星为太阳系九大行星中的第八个，是一个巨行星。海王星是第一个通过天体力学计算后被发现的行星。因为天王星的轨道与计算的不同，1845年约翰·可夫·亚当斯和埃班·勤维叶推算了在天王星外的一个未知行星可能的位置。1846年9月23日柏林天文台台长约翰·格弗里恩·盖尔真的在这个位置发现了一颗新的行星：海王星。
目前海王星是太阳系内离太阳第二远的行星。海王星的名字是罗马神话中的海神涅普顿（Neptune）。
冥王星是太阳系九大行星中离开太阳最远、最小的一颗行星，1930年被发现。因为它离太阳最远，因此也非常寒冷，这和罗马神话中的冥王普鲁托所住的地方很相似，因此称为“Pluto”。
第2个回答 2008-12-19
nihao/By the sun in the solar system by gravitational bound by the celestial bodies formed, to the maximum extent it can be extended to about 1 light-years away. The main members of the solar system: the sun (star), the eight planets (Earth), numerous asteroids, a large number of satellites (including the moon), comets, meteoroid and a large amount of dust material and thin gaseous material. In the solar system, the sun The quality of the solar system accounted for 99.8 percent of the total mass, and other celestial bodies are less than the sum of 0.2 percent of the sun. Sun is the Center for Astrophysics, which controls the gravity of the solar system as a whole, so that other celestial bodies around the sun, the solar system's nine planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) are close to the same plane near Circular orbit, in the same direction around the sun.
Distance (AU) radius (Earth) quality (Earth) orbit inclination angle (degrees) orbital eccentricity gradient density (g/cm3)
Sun 0 109 332,800 --- --- --- 1.410
Mercury 0.39 0.38 0.05 7 0.2056 0.1 ° 5.43
Venus 0.72 0.95 0.89 3.394 0.0068 177.4 ° 5.25
Earth 1.0 1.00 1.00 0.000 0.0167 23.45 ° 5.52
Mars 1.5 0.53 0.11 1.850 0.0934 25.19 ° 3.95
Jupiter 5.2 11.0 318 1.308 0.0483 3.12 ° 1.33
Saturn 9.5 9.5 95 2.488 0.0560 26.73 ° 0.69
Uranus 19.2 4.0 17 0.774 0.0461 97.86 ° 1.29
Neptune 30.1 3.9 17 1.774 0.0097 29.56 ° 1.64
Eight planets, the general Mercury, Venus, Earth and Mars as the terrestrial planets, their common feature is its stone and iron from the main structure, and quality of the smaller radius, but a higher density. The Jupiter, Saturn, Uranus and Neptune known as the Jovian planets, their common feature is mainly hydrogen, helium, ice, methane, ammonia, etc., stone and iron accounted for only a very small proportion of their quality And are much greater than the radius of the Earth, but the density is lower.
Long terms, the distance between planets to the sun (a use that) a = 0.4 +0.3 * 2n-2 (an astronomical unit) n one that is far from near to the first planet-n (see the table) of the Earth, Mars, Jupiter, Saturn , Uranus, Neptune's rotation period to 12 hours a day or so, Mercury, Venus's rotation period is very long, were 58.65 days, 243 days and 6.387 day, most of the planet's rotation and the direction of the revolution in the same direction, but Venus is the opposite. In addition to Mercury and Venus, other planets have Raozhuan satellite, the satellite system poses.
In the solar system, has now found more than 1600 comets, most of the comet is in the same direction around the sun, but there are also reverse the revolution. Comet around the Sun in the operation of a strange shape change. In the solar system are a large number of small meteoroids, and some groups of the meteoroid is, the meteor is the product of the collapse of the comet. Large meteoroid landed on the ground to become meteorites. The solar system is an insignificant part of the galaxy, the Milky Way that it is only in the 100,000,000,000 stars in one of its center of the Milky Way from the 1000 second gap of about 8.5, or less than 30,000 light-years. With the sun throughout the solar system rotating around the center of the Milky Way. Can be seen, not in the solar system center of the universe, not in the center of the Milky Way. The sun is 50 million years ago by the collapse of interstellar cloud after a mission Xiaoyun from the collapse of its life span is about 100 million years.本回答被提问者采纳
Distance (AU) radius (Earth) quality (Earth) orbit inclination angle (degrees) orbital eccentricity gradient density (g/cm3)
Sun 0 109 332,800 --- --- --- 1.410
Mercury 0.39 0.38 0.05 7 0.2056 0.1 ° 5.43
Venus 0.72 0.95 0.89 3.394 0.0068 177.4 ° 5.25
Earth 1.0 1.00 1.00 0.000 0.0167 23.45 ° 5.52
Mars 1.5 0.53 0.11 1.850 0.0934 25.19 ° 3.95
Jupiter 5.2 11.0 318 1.308 0.0483 3.12 ° 1.33
Saturn 9.5 9.5 95 2.488 0.0560 26.73 ° 0.69
Uranus 19.2 4.0 17 0.774 0.0461 97.86 ° 1.29
Neptune 30.1 3.9 17 1.774 0.0097 29.56 ° 1.64
Eight planets, the general Mercury, Venus, Earth and Mars as the terrestrial planets, their common feature is its stone and iron from the main structure, and quality of the smaller radius, but a higher density. The Jupiter, Saturn, Uranus and Neptune known as the Jovian planets, their common feature is mainly hydrogen, helium, ice, methane, ammonia, etc., stone and iron accounted for only a very small proportion of their quality And are much greater than the radius of the Earth, but the density is lower.
Long terms, the distance between planets to the sun (a use that) a = 0.4 +0.3 * 2n-2 (an astronomical unit) n one that is far from near to the first planet-n (see the table) of the Earth, Mars, Jupiter, Saturn , Uranus, Neptune's rotation period to 12 hours a day or so, Mercury, Venus's rotation period is very long, were 58.65 days, 243 days and 6.387 day, most of the planet's rotation and the direction of the revolution in the same direction, but Venus is the opposite. In addition to Mercury and Venus, other planets have Raozhuan satellite, the satellite system poses.
In the solar system, has now found more than 1600 comets, most of the comet is in the same direction around the sun, but there are also reverse the revolution. Comet around the Sun in the operation of a strange shape change. In the solar system are a large number of small meteoroids, and some groups of the meteoroid is, the meteor is the product of the collapse of the comet. Large meteoroid landed on the ground to become meteorites. The solar system is an insignificant part of the galaxy, the Milky Way that it is only in the 100,000,000,000 stars in one of its center of the Milky Way from the 1000 second gap of about 8.5, or less than 30,000 light-years. With the sun throughout the solar system rotating around the center of the Milky Way. Can be seen, not in the solar system center of the universe, not in the center of the Milky Way. The sun is 50 million years ago by the collapse of interstellar cloud after a mission Xiaoyun from the collapse of its life span is about 100 million years.本回答被提问者采纳
第3个回答 2008-12-04
在英文中，大行星都是以罗马神话中神的名字来命名的。分别是：
水星：神使墨丘利（Mercury）；
金星：爱神维纳斯（Venus）；
地球：大地之神垓娅（Earth）；
火星：战神玛尔斯（Mars）；
木星；主神朱庇特（Jupiter）；
土星：农神萨图恩（Saturn）；
天王星：朱庇特的祖父，第一代天神乌拉诺斯（Uranus）；
海王星：海神尼普顿（Neptune）；
附加一个现在是矮行星的冥王星：冥神普路托（Pluto）。
水星：神使墨丘利（Mercury）；
金星：爱神维纳斯（Venus）；
地球：大地之神垓娅（Earth）；
火星：战神玛尔斯（Mars）；
木星；主神朱庇特（Jupiter）；
土星：农神萨图恩（Saturn）；
天王星：朱庇特的祖父，第一代天神乌拉诺斯（Uranus）；
海王星：海神尼普顿（Neptune）；
附加一个现在是矮行星的冥王星：冥神普路托（Pluto）。
第4个回答 2008-12-04
中文资料呢
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