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English: On the morning of February 1st, 2011, NASA’s Wide-field Infrared Survey Explorer, or WISE, took its last snapshot of the sky. This “last light” image is reminiscent of the “first light” image from WISE, taken only 13 months prior. WISE’s final picture shows thousands of stars in a patch of the Milky Way Galaxy, covering an area 3 times the size of the full Moon, in the constellation Perseus. In the upper left corner, a faint wispy cloud can be seen bending around a pulsating variable star called EV Persei. After its coolant ran out in October of 2010, WISE warmed up from -260 degrees to -200 degrees C. This image contains data from the two detectors largely unaffected by the warm-up: 3.4 and 4.6 microns (the 12 and 22 micron detectors are no longer useful at the warmer temperatures). The colour is representational: cyan (blue-green) shows light detected by the 3.4 micron channel of WISE, and red shows light seen by the 4.6 micron channel. This region of the sky had been observed by WISE previously in all four of its detectors as part of its primary survey, and it is hard to see any difference in the quality of the last-light images at 3.4 and 4.6 microns.
日期
来源 WISE
作者 NASA/JPL-Caltech/WISE Team

Position (J2000): RA=01h 50m 16s; Dec=+54° 16’ 14”. Constellation: Perseus. Fields of View: 0.76 x 0.76 degrees. Orientation: North is 207.4 degrees left of vertical. Color Mapping: Cyan=3.4 microns; Red=4.6 microns.

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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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当前2011年3月18日 (五) 20:462011年3月18日 (五) 20:46版本的缩略图2,000 × 2,000(761 KB)Originalwana{{Information |Description ={{en|1=On the morning of February 1st, 2011, NASA’s Wide-field Infrared Survey Explorer, or WISE, took its last snapshot of the sky. This “last light” image is reminiscent of the “first light” image from WISE,

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