lobster-nebula

Messier 17: Omega Nebula

Messier 17, the Omega Nebula or Swan Nebula, is a star forming region located about 5,500 light years away towards the constellation Sagittarius. It is one of the most active regions of star formation in the Milky Way, and its fascinating shapes are created by the young, hot stars it contains.

These stars carve away at surrounding dust and gas, stripping away some material and shaping the rest. The ultraviolet radiation also ionizes hydrogen gas. In this process, radiation energizes electrons, stripping them from their nuclei. The electrons recombine into atoms, and release a photon of light, creating the characteristic red glow.

Image from National Geographic, information from HubbleSite.

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     First ImageCat Paw Nebula is an emission nebula where it’s red hue comes from ionized hydrogen. Can be located in Scorpius and is “5,500 light years distant”! Can be also known as the Bear Claw Nebula or NGC 6334. Fun fact, stars 10 times the mass of the Sun have been born here in the past few mil. years

     Second Image: Messier 17 (M17), also known as Star factory is just about as far as the Cat Paw Nebula, some 5,500 light years away in “nebula-rich constellation, Sagittarius "This emission nebula has several names, " Omega NebulaSwan NebulaCheckmark NebulaLobster Nebula, and the Horseshoe Nebula

Sources: * NASA Archives (1)
               * NASA Archives (2)

The Lobster Nebula - NGC 6357

This image from ESO’s VISTA telescope captures a celestial landscape of vast, glowing clouds of gas and tendrils of dust surrounding hot young stars. This infrared view reveals the stellar nursery known as NGC 6357 in a new light. It was taken as part of the VISTA Variables in the Vía Láctea (VVV) survey, which is currently scanning the Milky Way in a bid to map our galaxy’s structure and explain how it formed.

Credit: ESO/VVV Survey/D. Minniti. Acknowledgement: Ignacio Toledo

Heart of the Omega Nebula

A hotbed of newly born stars is swaddled in colorful blankets of glowing gas and cradled in an enormous, cold, dark, hydrogen cloud. As the infant stars evaporate the surrounding cloud, they expose dense pockets of gas that may contain developing stars.

Credit: NASA, H. Ford (JHU), G. Illingworth (UCSC/LO), M.Clampin (STScI), G. Hartig (STScI), the ACS Science Team, and ESA

Stardust

Sweeping the Dust from a Cosmic Lobster

A new image from ESO’s VISTA telescope captures a celestial landscape of glowing clouds of gas and tendrils of dust surrounding hot young stars. This infrared view reveals the stellar nursery known as NGC 6357 in a surprising new light. It was taken as part of a VISTA survey that is currently scanning the Milky Way in a bid to map our galaxy’s structure and explain how it formed.

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A Cosmic Rose With Many Names

This is one of the sharpest images showing the rose-coloured star forming region Messier 17. It not only reveals its full size but also retains great detail throughout the cosmic landscape of gas clouds, dust and newborn stars.

The nebula here, located about 5500 light-years from Earth in the constellation of Sagittarius, may have had more names given over the ages than any other object of its kind. Although officially known as Messier 17, its nicknames include: the Omega Nebula, the Swan Nebula, the Checkmark Nebula, the Horseshoe Nebula and the Lobster Nebula (very graceful).

credit: European Southern Observatory

Composite images obtained with the 3.58-metre NTT at La Silla Observatory. 

The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, Lobster Nebula, and the Horseshoe Nebula (catalogued as Messier 17 or M17 and as NGC 6618) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way.

Credit: ESO

The star-forming region of Messer 17 is more popularly known as the Omega Nebula or Swan Nebula … or perhaps you might know it as the Lobster Nebula, Horseshoe Nebula, or maybe even the Checkmark Nebula. 

No matter how many names it has, the beauty of this star-forming region is quite singular. The cavernous shape, made visible by creating a composite image from the Subaru and Hubble telescopes, is created when the hot winds from young stars sweep the faint wisps of gas and dust outward. 

M17 can be found around 5,000 light-years from Earth in the constellation of Sagittarius. 

-RLO

Image: Subaru Telescope (NAOJ), Hubble Space Telescope, 
Color data: Wolfgang Promper, Processing: Robert Gendler

Source

Wide Field NGC 6357

8,000 light-years away in the direction of the constellation Scorpius, the thick molecular clouds of NGC 6357 are home to many hot young stars. The bright pocket of stars near the center of this emission nebula is the open cluster Pismis 24, which has some of the brightest high-mass stars in our galaxy. At least three stars in the cluster have 70 to 100 times that of our Sun, which is rare given the small size of this stellar neighborhood.

The intense radiation from the stars in Pismis 24 and other star forming regions within the nebula are sculpting the gas and dust into complex shapes and carving out cavities around some of the most brilliant and powerful stars. But beyond their reach there is more dust still, hiding some of the background stars, and making the nebula stand out starkly against the sky.

Sometimes referred to as the Lobster Claw Nebula, NGC 6357 spans some 400 light-years across. That same moniker is sometimes used in reference to Messier 17 (M17, the Omega Nebula) as well. This image is a color composite from the Digitized Sky Survey.

-JF

Image credit: ESA/Hubble, ESA/ESO/NASA, Digitized Sky Survey 2

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The Omega Nebula

The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, Lobster Nebula, and the Horseshoe Nebula (catalogued as Messier 17 or M17 and as NGC 6618) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way.

The Omega Nebula is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter. The cloud of interstellar matter of which this nebula is a part is roughly 40 light-years in diameter and has a mass of 30,000 solar masses. The total mass of the Omega Nebula is an estimated 800 solar masses.

It is considered one of the brightest and most massive star-forming regions of our galaxy. Its local geometry is similar to the Orion Nebula except that it is viewed edge-on rather than face-on.

An open cluster of 35 stars lies embedded in the nebulosity and causes the gases of the nebula to shine due to radiation from these hot, young stars; however the actual number of stars in the nebula is much higher - up to 800, plus >1000 stars in formation on its outer regions.It’s also one of the youngest clusters known, with an age of just 1 million years.