The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula in the Milky Way situated south of Orion's Belt in the constellation of Orion, [b] and is known as the middle "star" in the "sword" of Orion. It is one of the brightest nebulae and is visible to the naked eye in the night sky with an apparent magnitude of 4.0.

猎户座大星云（M42，NGC 1976）是一个位于猎户座的弥漫星云，距地球1344 ± 20光年，为最接近我们的一个恒星形成区。 它的亮度相当高，在全天仅次于船底座星云，在无光害的地区用肉眼就可观察。

獵戶座大星雲 （M 42， NGC 1976）是一個位於 银河系 的 弥漫星雲，在天空中坐落在 猎户座 的 猎户腰带 位置 [b]，作为 猎户之剑 的中心。 猎户座大星云是亮度最高的星云之一，在夜空中 裸眼 可见， 视星等 为4.0。

2002年3月6日 · The Hubble Space Telescope continues to reveal various stunning and intricate treasures that reside within the nearby, intense star-forming region known as the Great Nebula in Orion. Copyright © Anglo-Australian Observatory. Photograph by David Malin. Are you a journalist? Subscribe to the ESA/Hubble Media Newsletter.

2013年8月21日 · The Orion Nebula is a famous diffuse emission/reflection nebula located in the constellation Orion. It is also known as Messier 42 (M42) or the Great Orion Nebula. Its designation in the New General Catalogue is NGC 1976. The brightest stars in the nebula form an asterism known as the Trapezium Cluster.

2024年10月8日 · The astronomical object called M 42 is a HII Region

猎户座大星云（M42，NGC 1976）是位于猎户座的反射星云，也是位于猎户座的弥漫星云。 1656年由荷兰天文学家惠更斯发现，直径约16光年，视星等4等，距地球1500光年，同位置也在中国星名“伐一”“伐二”“伐三”附近…

The New General Catalogue of Nebulae and Clusters of Stars (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and emission nebulae.

The images With Blue Borders were taken using equipment provided by the MAS Observatory Click on the Image to View It Full Size

Messier 42 or M42 (also designated NGC 1976) is a nebula in the constellation Orion. It has an apparent visual magnitude of 4 and its angular diameter is 85x60 arc-minutes. M42 lies at an estimated distance of 1600 light years. The Equinox 2000 coordinates are RA= 5h 35.4m, Dec= -05° 27´ which makes M42 best seen during the winter.