File:Hubble Sees a Horsehead of a Different Color.jpg

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العربية: استخدم عُلماءُ الفلك مقراب (تلسكوپ) هابل الفضائي لِتصوير سديم رأس الحصان الشهير، بالأشعَّة دون الحمراء احتفالًا بِالذكرى الثالثة والعشرين لِإطلاق المقراب المذكور إلى الفضاء على متن المكُّوك دسكڤري، وذلك يوم 24 نيسان (أبريل) 1990.

يبدو السديم للناظر وكأنه كائنٌ يخرج من الرغوة البيضاء البينجميَّة. ظهر سديم رأس الحصان في كُتُب علم الفلك مُنذُ اكتشافه منذُ أكثر من قرنٍ تقريبًا. وهو هدف رصدٍ مُفضَّل عند عُلماء الفلك المُتخصصين والهُواة. يظهرُ مُظللًا في الضوء المرئي. ويبدو شفافًا وأثيريًّا عندما يُنظرُ إليه بالأشعَّة ما دون الحمراء. تبرُزُ النُجود الغنيَّة لِسيم رأس الحصان وخلفها نُجُوم مجرَّة درب التبَّانة ومجرَّاتٍ بعيدةٍ أُخرى تسهل رؤيتها بالأشعَّة دون الحمراء.

انتج مقراب هابل بياناتٍ علميَّةٍ مُبهرةٍ طيلة عقدين. وخلال هذه الفترة، استفاد من بضعة تحسيناتٍ بطيئةٍ قامت بها البعثات الفضائيَّة المُتتالية، بما فيها بعثة سنة 2009 التي أُضيفت فيها أدوات تصويرٍ حديثة، بما فيها كاميرا تلتقط صُورًا عالية الجودة ذات زوية واسعة، وهي التي التقطت صورة السديم الجديدة هذه.
English: Astronomers have used NASA's Hubble Space Telescope to photograph the iconic Horsehead Nebula in a new, infrared light to mark the 23rd anniversary of the famous observatory's launch aboard the space shuttle Discovery on April 24, 1990.

Looking like an apparition rising from whitecaps of interstellar foam, the iconic Horsehead Nebula has graced astronomy books ever since its discovery more than a century ago. The nebula is a favorite target for amateur and professional astronomers. It is shadowy in optical light. It appears transparent and ethereal when seen at infrared wavelengths. The rich tapestry of the Horsehead Nebula pops out against the backdrop of Milky Way stars and distant galaxies that easily are visible in infrared light.

Hubble has been producing ground-breaking science for two decades. During that time, it has benefited from a slew of upgrades from space shuttle missions, including the 2009 addition of a new imaging workhorse, the high-resolution Wide Field Camera 3 that took the new portrait of the Horsehead.
Date
Source http://www.nasa.gov/multimedia/imagegallery/image_feature_2493.html
Author NASA/ESA/Hubble Heritage Team

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