APOD251231 HH-222:瀑布星云
HH-222:瀑布星云
图像提供与版权: Mike Selby[1]
英文原文:Explanation: 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 , though, 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 year s 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 说明: 瀑布星云是如何形成的? 其起源仍在研究中。这个结构,正式名称为赫比格-哈罗天体[2] 222 (HH 222),位于猎户座大分子云[3]复合体中的NGC 1999[4]区域。 这条延伸的气体流约十光年[5]长,但看起来类似于地球上的长瀑布[6]。 最近的观测[7]显示,HH-222[8]可能是一个巨大的气体弓形震波[9],类似于高速航行的船只激起的水波[10]。 然而,人们认为这个震波[11]的起源是位于画面左下方的多重恒星[12]系统猎户座 V380 [13]所喷出的喷流。 因此,气体[14]并非沿着瀑布流动[15],而是整个结构向右上方移动。 瀑布星云[16]位于猎户座[17]方向,距离地球约1,500光年[18]。 这幅照片[19]是本月初在智利[20]的柳树(El Sauce)天文台[21]在拍摄的。
拼图星云: 每日天文谜题[22]
明日的图片: open space[23]
Authors & editors: Robert Nemiroff[24] (MTU[25]) & Jerry Bonnell[26] (UMCP[27])
NASA Official: Amber Straughn Specific rights apply[28].
NASA Web Privacy[29], Accessibility[30], Notices[31];
A service of: ASD[32] at NASA[33] / GSFC[34],
NASA Science Activation[35]
& Michigan Tech. U.[36]
太空天文实验室(成功大学物理系)
<br/> 编辑:<a href="mailto:hantzong.su@gmail.com" style="color:gray;" target="_blank">苏汉宗</a>
编辑:陈炳志[37]
[1]https://throughlightandtime.com/about/
[2]https://en.wikipedia.org/wiki/Herbig%E2%80%93Haro_object
[3]http://apod.nasa.gov/apod/ap070125.html
[4]http://apod.nasa.gov/apod/ap180307.html
[5]https://spaceplace.nasa.gov/light-year/
[6]http://apod.nasa.gov/apod/ap190112.html
[7]https://ui.adsabs.harvard.edu/abs/2013AJ....146..118R/abstract
[8]https://www.astroexplorer.org/details/aj481802f1
[9]https://en.wikipedia.org/wiki/Bow_shock
[10]https://youtu.be/95sQcSulRFM
[11]https://www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/airplane/shock.html
[12]https://science.nasa.gov/universe/stars/
[13]https://en.wikipedia.org/wiki/V380_Orionis
[14]http://apod.nasa.gov/apod/ap250528.html
[16]https://en.wikipedia.org/wiki/HH_222
[17]https://spaceplace.nasa.gov/constellations/
[18]https://science.nasa.gov/exoplanets/what-is-a-light-year/
[19]https://throughlightandtime.com/hh-222-ha-rgb-rev-3-cdk-1000-26-dec-2025/
[20]https://en.wikipedia.org/wiki/Chile
[21]https://youtu.be/shbwtlPIDI4
[22]https://www.scigames.org/apps/webjigsaw2/index.php
[23]http://apod.nasa.gov/apod/ap260101.html
[24]http://www.phy.mtu.edu/faculty/Nemiroff.html
[26]https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
[28]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[29]https://www.nasa.gov/about/highlights/HP_Privacy.html
[30]https://www.nasa.gov/general/accessibility/
[31]https://www.nasa.gov/privacy/
[32]https://astrophysics.gsfc.nasa.gov/
[34]https://www.nasa.gov/centers/goddard/
[35]https://science.nasa.gov/learners
[37]mailto:alfred@ncku.edu.tw
http://apod.nasa.gov/apod/ap251231.html
http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap251231.html