Copernicus solar system Cogito ergo sum I think

哥白尼的日心理論 Copernicus solar system

Cogito ergo sum I think, therefore I am. 我思故我在 迪卡爾 René Decarte (1596 -1650) —近代數學之父 思考方法的先驅 If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things. 如果真想成為真理的追求者，一生中 至少要有一次對一切事物存疑的經驗， 而且懷疑得越深遠越好 能顛覆自己的觀念，才是真正思想自由的人

希臘哲學家 德謨克利特（Democritus, 460 -370 BC）最早提出銀河是由遠處的 星星所組成的。 十七世紀，Galileo用望遠鏡觀察星空確定銀河裡有無數無窮的星星。 The Greek philosopher Democritus (460 BC– 370 BC) was the first known person to propose that the Milky Way might consist of distant stars. Actual proof of this came in 1610 when Galileo Galilei used a telescope to study the Milky Way and discovered that it was composed of a huge number of faint stars. Digital Sky LLC

無球粒隕石 碳質球粒隕石 achondrite carbonaceous chondrite H. Raab 鐵質隕石 石鐵隕石 iron meteorite stony-iron meteorite 隕石球粒的主要成分有氧、矽、鎂、鐵， 與小行星及石質行星的成份相近。 隕石球粒的化學分析提供了對小行星及對 石質行星形成過程的了解。 The Willamette Meteorite (composed of over 91% iron and 7. 62% nickel, with traces of cobalt and phosphorus) was discovered in the Willamette Valley of Oregon, US. User: Dante Alighieri 資料來源 http: //research. kahaku. go. jp/department/engineering/3/inseki/koube_inseki 2. html