Copyright:
Mike Selby
中文翻譯:
在遙遠的星空中，有一種美麗的星雲，叫做 Waterfall Nebula！這個星雲的正式名稱是 Herbig-Haro 222，它出現在大獵戶座分子雲的 NGC 1999 區域。這片延展的氣體像一條長長的瀑布，延伸著大約十光年，但其實它在宇宙中是隨著整個結構向右上方移動的！科學家們最近觀察到，這個瀑布星雲很可能是一個巨大的氣體波浪，就像快船引起的水波一樣。這個神奇的波浪是由靠近畫面左下角的多星系 V380 Orionis 所引起的。Waterfall Nebula 距離我們大約 1,500 光年，位於獵戶座的星座中。這幅圖片是本月初在智利的 El Sauce Observatory 所拍攝的呢！
原文:
What created the Waterfall Nebula? The origin is still being researched. The structure, officially designated Herbig-Haro 222, appears in the region of NGC 1999 in the Great Orion Molecular Cloud complex. The elongated gaseous stream stretches about ten light years but appears similar to a long waterfall on Earth. Recent observations indicate that HH-222 is likely a gigantic gaseous bow shock, similar to a wave of water caused by a fast-moving ship. The origin of this shock wave is thought to be a jet outflow from the multiple star system V380 Orionis off the lower left of the frame. Therefore, gas does not flow along the waterfall, but rather the entire structure moves toward the upper right. The Waterfall Nebula lies about 1,500 light years away toward the constellation of Orion. The featured image was captured earlier this month from El Sauce Observatory in Chile. Jigsaw Nebula: Astronomy Puzzle of the Day
來源:NASA每日圖片
