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NGC 2174 (Monkey Head Nebula)


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NGC 2174
Monkey Head Nebula (モンキー星雲)
Emission Nebula (散光星雲)
Nb EN


別名 (Other names)
CED 67A surrounds N 2175

星座 (Constellation)
オリオン座 (Ori) (Orion)

距離 (Distance)
6,400光年 (6,400 light-years)

NGC 2174は、オリオン座の方角にある輝線星雲のHII領域。モンキー星雲とも呼ばれる。
散開星団NGC 2175に付随して存在する。地球からは6,400光年離れていると考えられている。
この星雲は、階層崩壊によって形成された可能性があると考えられている。

Monkey Head Nebula (NGC 2174) is an emission nebula located 6,400 light years from the Earth in the constellation Orion.

NGC 2174 (Monkey Head Nebula) : Picture

Monkey Head Nebula (NGC 2174)
NGC 2174: Emission Nebula in Orion
(C) Dan Kowall (Photonhunter.com)
A lesser known sight in the nebula-rich constellation Orion, NGC 2174 can be found with binoculars near the head of the celestial hunter. About 6,400 light-years distant, the glowing cosmic cloud surrounds loose clusters of young stars. Covering an area larger than the full Moon on the sky, this stunning narrow band image adopts a typical color mapping of the atomic emission from NGC 2174. The false-color mapping shows otherwise red hydrogen emission in green hues and emphasizes sulfur emission in red and oxygen in blue. Placing your cursor on the image will reveal an alternative image of the nebula made through broad band filters. The broad band image combines filters in a closer analogy to human vision, dominated by the red glow of hydrogen.

NGC 2174 (Monkey Head Nebula)
NGC 2174 (Monkey Head Nebula)
(C) NASA

NGC 2174
The 'van Gogh' of the Infrared Sky
(C) NASA/JPL-Caltech/UCLA
NASA’s Wide-field Infrared Survey Explorer, or WISE, is a little like the Vincent van Gogh of the infrared sky. Just like the famous Impressionist painter created beautiful images of nature through use of color and light, WISE has provided the world with picturesque images of the cosmos by representing infrared light through color. This image of the nebula NGC 2174, on the border of the Gemini and Orion constellations, is a perfect example.

The colors in this image may look like brush strokes of paint but actually represent specific wavelengths of infrared light. Particles of interstellar dust are warmed by the star cluster in the center of the nebula, and glow in wavelengths of 12 and 22-microns, which WISE represents by the colors green and red. The blue and cyan (blue-green) stars scattered throughout the “canvas” of the image are hot compared to the dust, and emit light at 3.4 and 4.6 microns.

Affectionately called the “Monkey nebula” by some, NGC2174 is a cloud of gas and dust that surrounds the star cluster NGC2175. As the star cluster heats up the nebula, the dust begins to glow in infrared light. Strong winds and radiation from the stars blow away the nearby material, creating a shell-like structure. NGC2174 was discovered in 1877 by French astronomer Jean Marie Stephan, who used an 80-centimeter reflecting telescope at the Observatoire de Marseille, France. Today, it is a favorite target for amateur astronomers because it can be seen in binoculars or a small telescope.

Another nebula can be seen in the upper half of this image. In this case, the gas is hollowed out by a massive star named TYC 1326-964-1. The matter in between the stars in this nebula is named [GS55] 85, after the initials of the astronomers who first catalogued it in the 1950s. Several red-colored young stellar objects can be seen scattered throughout this nebula. These are newly formed stars still enshrouded in a cloud of dust. Near the top and toward the left of the image lies a bright blue star known as HR2190, which is actually a red dwarf star. Red dwarfs are on the cooler and dimmer side for stars, so the relative brightness of HR2190 in the image means that it is much closer to us than the nebula.

Wide field image of NGC 2174
Wide field image of NGC 2174 (ground-based view)
(C) NASA, ESA, Digitized Sky Survey (DSS), STScI/AURA, Palomar/Caltech
This image, a composite of red and blue exposures from the Digitized Sky Survey 2, shows the region of sky surrounding NGC 2174, more popularly known as the Monkey Head Nebula. To celebrate its 24th year observing Hubble revisited the Monkey Head Nebula and a brand new image was released of one of its breathtaking pillars. The small square near the centre of this image is where the pillar can be found.

NGC 2174 (Monkey Head Nebula)
NGC 2174 (Monkey Head Nebula)
(C) NASA, ESA, and the Hubble Heritage Team (STScI/AURA)
To celebrate its 24th year in orbit, the NASA/ESA Hubble Space Telescope has released this beautiful new image of part of NGC 2174, also known as the Monkey Head Nebula.

NGC 2174 lies about 6400 light-years away in the constellation of Orion. Hubble previously viewed this part of the sky back in 2011 — the colourful region is filled with young stars embedded within bright wisps of cosmic gas and dust.

This portion of the Monkey Head Nebula was imaged in the infrared using Hubble's Wide Field Camera 3.

Location of the Hubble IR Detail in NGC 2174
Location of the Hubble IR Detail in NGC 2174
(C) NASA and ESA
Acknowledgment: NASA, ESA, and the Hubble Heritage Team (STScI/AURA), and R. Crisp

Visible and Infrared Comparison of NGC 2174
Visible and Infrared Comparison of NGC 2174
(C) NASA and ESA
Acknowledgment: NASA, ESA, and the Hubble Heritage Team (STScI/AURA), and J. Hester

NGC 2174 NGC 2174
NGC 2174
(C) Dan Kowall
NGC 2174
(C) NASA
NGC 2174 NGC 2174
NGC 2174
(C) NASA
NGC 2174
(C) NASA
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NGC 2174 (Monkey Head Nebula) : Movie

Zooming in on NGC 2174
This video sequence begins by zooming through the constellation of Orion, finishing on new NASA/ESA Hubble Space Telescope observations of part of NGC 2174, also known as the Monkey Head Nebula.

Panning across NGC 2174
This video sequence pans across new NASA/ESA Hubble Space Telescope observations of part of NGC 2174, also known as the Monkey Head Nebula.

NGC 2174 lies about 6,400 light-years away. Hubble previously viewed this part of the sky back in 2011, and the space telescope has now revisited the region to celebrate its 24th year of operation.

This image was created using infrared observations from Hubble's Wide Field Camera 3.

Hubblecast 73: Hubble revisits the Monkey Head Nebula for 24th birthday snap
In April of this year, the NASA/ESA Hubble Space Telescope will be celebrating 24 years of observing. To celebrate this milestone, the observatory is releasing a brand new image of part of NGC 2174, otherwise known as the Monkey Head nebula. This new Hubblecast episode showcases this beautiful image, which views a colourful region filled with young stars embedded within bright wisps of cosmic gas and dust.
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「ウィキペディア(wikipedia):フリー百科事典」より文章引用。
NGC 2174. (2013, November 24). In Wikipedia.
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