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| 開拓知識疆界 | 反映時代面貌 | 改變世界的傳奇攝影 | 考察與探險大發現 |

A different astronomy and space science related image is featured each day, along with a brief explanation.

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Twitter is without a doubt the best way to share and discover what is happening right now.

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people ...