تم تعطيل الجافا سكربت. للحصول على تجربة أفضل، الرجاء تمكين الجافا سكربت في المتصفح الخاص بك قبل المتابعة.

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الرسالة: [QUOTE="سرجيوُس, post: 3438385, member: 106640"] [FONT=Arial][SIZE=5]مرجع اخر “[COLOR=Blue]It takes the solar system about 225-250 million years to complete one orbit (a galactic year),[17] and so is thought to have completed about 20-25 orbits during its lifetime or 0.0008 orbit since the origin of humans. The orbital speed of the solar system is 217 km/s, i.e. 1 light-year in ca. 1400 years, and 1 AU in 8 days.” [/COLOR][COLOR=Blue][URL]http://en.wikipedia.org/wiki/Milky_Way[/URL][/COLOR] Our solar system orbits around the super massive black hole at the center of our galaxy making one rotation approximately every 225-250 million years لدينا مدارات النظام الشمسي حول الثقب الأسود الهائل سوبر في مركز مجرتنا جعل التناوب واحدة تقريبا كل 225-250 سنوات +++++++++++++++++ The Sun's Orbit The planets rotate and circle the Sun. Does the Sun rotate and circle something larger? Yes, the Sun is only one of many stars in our galaxy, the Milky Way. It is located in one of the spiral arms about 30,000 light years from the center. It moves at a speed of 200 - 300 km/sec in its orbit around the galactic nucleus, and takes roughly 200 million of our years to make one orbit of the Galaxy, or one "galactic year". Drs. Eric Christian and Louis Barbier وهذا موقع ناسا [URL]http://helios.gsfc.nasa.gov/qa_sun.html[/URL][/SIZE][/FONT] [/QUOTE]