NASA的三架大型天文台——哈勃太空望远镜、斯皮策太空望远镜与钱德拉X射线天文台近日联合拍摄了一张银河中心区域的大型复合照片。
A giant composite image of the Milky Way's center has been taken by NASA's three Great Observatories - the Hubble and Spitzer Space Telescopes and the Chandra X-ray Observatory.
这是教育作家凯伦·施韦策提供的一张主人席位。
This is a guest post from education writer Karen Schweitzer.
张培力，艺术家，策展人，中国录像艺术之父。
Zhang Peili is an artist and a curator, and a video art pioneer in China.
张培力，艺术家，策展人，中国录像艺术之父。
Zhang Peili is an artist and a curator, and a video art pioneer in China.
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