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Astronomy版 - Astronomy Picture of Day: Beautiful Trifid
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相关话题的讨论汇总
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发帖数: 1994
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A Beautiful Trifid
Credit & Copyright: Jim and Janet Castano, Adam Block, NOAO, AURA, NSF
Explanation: The beautiful Trifid Nebula (aka M20), a photogenic study in cosmic contrasts,
lies about 5,000 light-years away toward the nebula rich constellation Sagittarius. A star
forming region in the plane of our galaxy, the Trifid alone illustrates three basic types of
astronomical nebulae; red emission nebulae dominated by light from hydrogen atoms, blue
reflection nebulae produced by dust reflec
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每日一图 疏散星团M38每日一图 美洲天文台的夜空 -大小麦哲伦和南十字架
相关话题的讨论汇总
话题: trifid话题: beautiful话题: nebulae话题: picture话题: astronomy