The Cat’s Paw Nebula, also known as the Bear Claw Nebula, is an emission nebula in Scorpius.
The nebula is about 50 light years across and lies at an approximate distance of 5,500 light years from Earth. It is one of the nearest H II regions to the solar system. It has the designation NGC 6334 in the New General Catalogue.
The large glowing cloud earned the nickname Cat’s Paw because it looks like a gigantic pawprint of a cat. The nebula is a popular target of study as a nearby example of a vast, very active stellar nursery.
NGC 6334 is a large star forming region, covering an area in the night sky slightly larger than the full Moon. It is one of the most active stellar nurseries producing massive stars in the Milky Way Galaxy.
The hot young stars embedded in the nebula are responsible for its glow. The stars are each roughly 10 times as massive as the Sun and were formed relatively recently, within the last few million years.
NGC 6334 may contain tens of thousands of stars, many of them concealed deep within the nebula’s dust.
The nebula also contains a vast supply of material needed for star formation, roughly equal to a mass of 200,000 Suns .
A study conducted by researchers from the Harvard-Smithsonian Center for Astrophysics and released in 2013 suggests that the Cat’s Paw Nebula may be undergoing a stellar “baby boom,” a period of rapid star formation.
The region is producing new stars at a more rapid pace than the more famous Orion Nebula (Messier 42), making NGC 6334 one of the most prolific stellar nurseries known in the Milky Way.
The nebula is home to about 2,000 extremely young stars that are still surrounded by protoplanetary disks, rotating disks of dense gas and dust that surround newly formed stars. The majority of these stars are formed in clusters.
The cause of the rapid star formation in NGC 6334 is still unknown. Scientists have ruled out two common causes of stellar baby booms: a nearby supernova explosion and galaxy collision. Neither of these explains the increased star forming activity in the nebula. The starburst period began relatively recently and will likely end within the next few million years.
FACTS
The nebula’s distinctly red glow is the result of an abundance of ionised hydrogen atoms. The dust in NGC 6334 has an extremely low temperature, around -445 F (8 K or -265°C).
This picture shows the sky around multiple star Gliese 667. The bright star at the centre is Gliese 667 A and B, the two main components of the system, which cannot be separated in this image. Gliese 667C, the third component, is visible as a bright star, very close and just under A and B, still in the glare of these brighter stars. The very subtle wobbles of Gliese 667C, measured with high precision spectrographs including HARPS, revealed it is surrounded by a full planetary system, with up to seven planets. This picture also shows two regions of star formation, much further from Earth than Gliese 667. At the upper-left NGC 6357 is visible and towards the bottom of the picture NGC 6334 (The Cat’s Paw Nebula). Image: ESO
The Cat’s Paw Nebula was discovered by the
The Cat’s Paw Nebula was discovered by the British astronomer John Herschel on June 7, 1837. Herschel used one of the largest telescopes available at the time and observed the nebula from the Cape of Good Hope in South Africa.
NGC 6334 lies near the diffuse nebula NGC 6357, popularly known as the War and Peace Nebula, which also contains a number of young stars, as well as proto-stars embedded within dark disks of gas.
In the future, the Cat’s Paw Nebula will look a bit like multiple Pleiades star clusters, each containing up to several thousand stars.
However, as the nebula is more than 10 times farther away than the Pleiades (Messier 45) and obscured by a lot of dust, the sight won’t be nearly as impressive from Earth.
Cat’s Paw Nebula – NGC 6334
Constellation: Scorpius
Coordinates: 17h 19m 58s (right ascension), -35°57’47” (declination)
Distance: 5,500 light years
Angular size: 40′
Designations: Cat’s Paw Nebula, NGC 6334, Bear Claw Nebula, Gum 64, Sharpless 8, RCW 127, ESO 392-EN 009, GC 4288
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