NASA每日一图之4月19日----红外的猎户座
Do you recognize the constellation Orion? This striking but unfamiliar looking picture of the familiar Orion region of the sky was produced using survey data from the now-defunct InfraRed Astronomical Satellite (IRAS). The above image combines information recorded at three different invisible infrared wavelengths and covers about 30x24 degrees on the sky. Most of Orion's visually impressive stars don't stand out, but bright Betelgeuse does appear as a small bright purplish dot on the lower left. The bright region on the right contains the Great Nebula in Orion, while the bright region just above the image bottom is the Rosette Nebula. Surrounding these regions are a jumble of chaotic glowing gas and dark dust jettisoned by stars forming and exploding over millions of years.你能认出这是猎户座吗？熟悉的猎户天区在图中显得惊人而又陌生。这张图片是用已结束任务的红外天文卫星infraRed Astronomical Satellite （IRAS）的巡天数据合成的。上面的图象综合了3个不同的红外波段的信息，覆盖了30x24 度的天区。猎户座中大多数在可见波段著名的恒星都不突出，但明亮的猎户座α作为一个明亮的紫色小点出现在左下方。图中右边的明亮区域包含了猎户大星云，而下方的明亮区域是美丽的玫瑰星云。围绕着这些区域的是杂乱的炽热气体和暗尘埃，它们是数百万年前恒星形成和爆发时被抛射出来的。
IRAS http://lambda.gsfc.nasa.gov/product/iras/
猎户座中大多数在可见波段著名的恒星 http://antwrp.gsfc.nasa.gov/apod/ap030207.html
猎户座α http://antwrp.gsfc.nasa.gov/apod/ap040927.html
玫瑰星云 http://antwrp.gsfc.nasa.gov/apod/ap010214.html
暗尘埃 http://antwrp.gsfc.nasa.gov/apod/ap030706.html 好棒 不错啊
！ 不错，
感觉绚丽多了 不错啊！ 感觉更绚丽了。 好图 楼上的要适可而止啊！
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