Images of NGC 1291galaxy, Similar withThe Wheel

Astronomy Science ~ This galaxy looks like a toothed wheel or even similar to the weapons 'disc' of Xena. A new image released by t...

Astronomy Science ~ This galaxy looks like a toothed wheel or even similar to the weapons 'disc' of Xena. A new image released by the Spitzer Space Telescope shows the galaxy NGC 1291. While this galaxy is fairly old, aged approximately 12 billion years old, but this galaxy has an unusual ring of the areas of new star formation.

"This galaxy is roll," said Kartik Sheth of the National Radio Astronomy Observatory of Charlottesville, Virginia. "But the new outer ring now starts up with the stars."

NGC 1291 lies about 33 million light-years away in the constellation Eridanus. This galaxy is known as trunked galaxy, because its central area is dominated by a long bar formed by a star (in the new image above, the bar is surrounded by a circle of blue and looks like the letter "S").
NGC 1291
Bar was formed in the early history of galaxies. Turbulent material around the galaxy, forcing the original stars and gas into a large circular orbits, not circular, orbits radial. This creates resonance regions where gas is compressed and trigger the formation of new stars. Our Milky Way galaxy has a bar, though not as prominent as in NGC 1291.

Sheth and his colleagues busy to better understand how stars like this bar forming the fate of the galaxy. In a program called the Spitzer Survey of Stellar Structure in Galaxies or S4G, Sheth and his team analyzed more than 3,000 structures of galaxies in our local neighborhood. Farthest galaxies of the group is located about 120 million light years - just like neighbors than the vastness of the universe.

In the Spitzer image above, infrared light wavelengths shorter visible in blue, infrared light wavelengths longer visible in red. Stars that appear in blue in the middle is a star that is older; most of the gas, or fuel-making stars, which was previously used by earlier generations of stars.

Over time, when the fuel runs out, be silent and central regions of star formation activity shifted to the outskirts of the galaxy.
There, spiral density waves and resonance caused by central bar help turn gas into stars. The outer ring seen here in red is one of the resonance region, where gas has been trapped and sparked lively star formation.

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AstroNation: Images of NGC 1291galaxy, Similar withThe Wheel
Images of NGC 1291galaxy, Similar withThe Wheel
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