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哈勃空间望远镜

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body.skin-minerva .mw-parser-output table.infobox caption{text-align:center} 哈勃太空望遠鏡 發現號太空梭在STS-82維修任務中拍攝的哈伯太空望遠鏡 基本资料 NSSDC ID 1990-037B 组织机构 NASA/ESA 发射日期 1990年4月24日 任务时长 至今已運作28年9個月25日 除役日期 大約2030–2040年 质量 11,000 公斤(24,250 磅) 轨道类型 橢圓 轨道高度 559 公里,366英里 轨道周期 96-97 分鐘 轨道速度 7,500 公尺/秒(16,800英里/時) 重力加速度 8.169公尺/秒 2 位置 低地球軌道 望远镜类型 RC反射鏡 波段 可见光、紫外線、近紅外線 口径 2.4 公尺(94 英吋) 集光面积 约4.3 平方公尺(46 平方英呎) 焦距 57.6 m(189 ft) 仪器 NICMOS 紅外相機/光譜儀 ACS 光學巡天相機 WFPC2 廣角相機(光學) STIS 光學光譜儀/相機 FGS 三個精細導星感測器 网站 http://www.nasa.gov/hubble http://hubble.nasa.gov http://hubblesite.org http://www.spacetelescope.org 各光学望远镜主镜尺寸比较 哈勃太空望遠鏡 ( 英语: Hubble Space Telescope , HST ),是以天文學家愛德溫·哈伯為名,在地球軌道的望遠鏡。哈勃望远镜接收地面控制中心(美国马里兰州的霍普金斯大学内)的指令并将各种观测数据通过无线电传输回地球。由于它位于地球大氣層之上,因此獲得了地基望遠鏡所沒有的好處:影像不受大氣湍流的擾動、視相度絕佳,且无大氣散射造成的背景光,還能觀測會被臭氧層吸收的紫外線。於1990年發射之後,已經成為天文史上最重要的儀器。它成功弥补了地面觀測的不足,幫助天文學家解決...

Katsukawa school

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The Katsukawa school (勝川派, -ha ) was a school of Japanese ukiyo-e art, founded by Miyagawa Shunsui. It specialized in paintings ( nikuhitsu-ga ) and prints of kabuki actors ( yakusha-e ), sumo wrestlers, and beautiful women ( bijin-ga ). The painter Miyagawa Shunsui changed his surname to Katsukawa. One of his students, Katsukawa Shunshō, took his surname and abandoned the school's tradition of painting well-dressed beauties in favour of yakusha-e portraits of kabuki actors, a domain once dominated by the Torii school. This new focus revived the actor print, which had lost popularity after Suzuki Harunobu's portraits of beauties rose to prominence in the late 1760s. [1] Shunshō introduced the ōkubi-e "large-headed picture" in the 1760s. [2] He and other members of the Katsukawa school, such as Shunkō, popularized ōkubi yakusha-e prints and the dusting of mica in the backgrounds to produce a luxurious glittering effect. [3] Shunsui was the son and stud...

Yamato-e

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Scene from The Tale of Genji by Tosa Mitsuoki, from the 17th century Tosa school revival of the style Yamato-e ( 大和絵 ) is a style of Japanese painting inspired by Tang dynasty paintings and fully developed by the late Heian period. It is considered the classical Japanese style. From the Muromachi period (15th century), the term Yamato-e has been used to distinguish work from contemporary Chinese-style paintings ( kara-e 唐絵 ), which were inspired by Chinese Song and Yuan-era ink wash paintings. Characteristic features of Yamato-e include many small figures and careful depictions of details of buildings and other objects, the selection of only some elements of a scene to be fully depicted, the rest either being ignored or covered by a "floating cloud", an oblique view from above showing interiors of buildings as though through a cutaway roof, and very stylised depiction of landscape. Yamato-e very often depict narrative stories, with or without accompanying text,...