trifid nebula

Divergent and emission mixing nebula

There are three very obvious black tracks on the Trifid Nebula, and its shape seems to be three pieces of light leaf Closely and harmoniously together, it is called the Trifid Nebula. Because of the three distinctive black stripes on the nebula, some astronomers also call them Trifid Nebula 。 The Trifid Nebula is located in Sagittarius 。

Chinese name: trifid nebula
Foreign name: M 20
Alias: Trifid Nebula 、 NGC6514
Classification: Divergence And emission mixing type Nebula
Discoverer: Charles Messier or Legendre (not sure)
Discovery time: June 5, 1764
Apparent magnitude: 6.3 etc

Right ascension: 18:2:18.0s
Declination: -23°2′00.0″
Distance from ground: About 5600 light years
Constellations: sagittarius
Apparent diameter: 29X27
Estimated age: 300000 years
Brightest star: HD 164492A

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trifid nebula

M20 （ NGC six thousand five hundred and fourteen ）Also called trifid nebula or Trifid Nebula It is a divergent and emission mixed nebula. Its color photos are very beautiful. You can see its pink and bright blue parts. Seen with a small telescope, it is more elusive - the nebula is divided into three regions by the dark ditch formed by the masking material, so it is called the Trifid Nebula. In the center of the nebula, there is another shining Triad - HN 40 。 M20 phase distance earth five thousand Light year , where hot young stars are surrounded by dust and gas. It is located in Sagittarius 。

About Sagittarius

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The Trifid Nebula is located in Sagittarius 。 To find the Trifid Nebula, we need to get familiar with it Sagittarius 。 Sagittarius is a very spectacular constellation, located in the galaxy The widest and brightest area is Galaxy The center direction of the. annually summer It is the best season to observe Sagittarius. At the end of June and the beginning of July, when the sun had just set, Sagittarius rose from the east and could be seen all night long. Sagittarius is the ecliptic 12 constellations One, to the east of it is Capricornus , west scorpio 。 Some people call Sagittarius sagittarius , that is not the standard name. The hero of Sagittarius is MYTHOS Horseman with a man in the middle and a horse in the lower Keloun 。 Caroline is good at archery and archery Greece The most knowledgeable person and many great heroes worship him as their teacher.

trifid nebula (15 sheets)

Since Sagittarius is relatively south north latitude The constellation can not be seen in the area north of 78 °, and the complete Sagittarius can only be seen in the area south of 45 ° north latitude. The complete Sagittarius can be seen in most parts of China. So, how can we find Sagittarius successfully? There are six bright stars in Sagittarius Big Dipper Very similar Nandou Six Stars 。 Although the brightness and size of the six stars of the Southern Dipper are inferior to those of the seven stars of the Northern Dipper, they are also very attractive. If you find the Southern Dipper, you will find Sagittarius.

Sagittarius The scope of Bright star Quite a lot, Second order star 2, Third order star 8. Sagittarius is also famous deep space In addition to the Trifid Nebula, there are 14 other places Messier , such as the famous Lagoon Nebula M8、 Horseshoe Nebula M17 Wait, the Trifid Nebula is Messier star list Middle ranking 20, referred to as M20. So, where is the Trifid Nebula? It's the brighter one on the handle of the six star Southern Dipper Sagittarius The southwest of μ star is about 4 ° away. The Trifid Nebula is 5600 light-years away.

About the Trifid Nebula

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trifid nebula

Use large Astronomical telescope Trifid Nebula Color photograph It makes everyone who has seen it marvel at its beauty. Three peach leaves form a blooming flower flower , beside it is a bright blue flower, so beautiful. Of course, if we use small telescope If you observe the Trifid Nebula, it will not be so beautiful.

trifid nebula

Under relatively good sky conditions (such as rural areas dozens of kilometers away from large cities, Naked eye limit star Wait for 6.0~7 0, etc.), using 7 times Binoculars You can see the Trifid Nebula. With a telescope with an aperture of 6 cm and a magnification of 20~40 times, three filaments in the nebula can barely be seen. It is easy to see the dark streaks in the nebula with a telescope with an aperture of more than 15 cm. Use 20 cm caliber telescope , the magnification is about 120 times. With a wide field of view eyepiece to observe the Trifid Nebula, the nebula can fill the entire field of view. When the magnification is about 190 times, the details of nebula filaments can be observed.

stay trifid nebula At the center of the Open cluster 。 These stars send out strong radiation to bombard hydrogen Atoms make them lose electrons, when electrons proton When combined again, it emits strange light - one of which is the red color seen in the nebula.

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