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N70 Nebula in the Large Magellanic Cloud
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Name: N 70, N 70 Superbubble, Henize 70, DEM301
Description: Nebula
Position (J2000): RA 5hr 43m 16.17s  Dec -67° 50' 54.16"
Constellation: Dorado
Distance: 170,000 light years
Field of view: 6.70 x 6.70 arcminutes
Orientation: North is 0.0° right of vertical
Image Credit: ESO
Release date: November 17, 1999

Widefield view:    N0912
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This image shows a three-color composite of the N 70 nebula. It is a "Super Bubble" in the Large Magellanic Cloud (LMC), a satellite galaxy to the Milky Way system, located in the southern constellation of Dorado at a distance of about 160,000 light-years. This photo is based on CCD frames obtained with the FORS2 instrument in imaging mode in the morning of November 5, 1999.

N 70 is a luminous bubble of interstellar gas, measuring about 300 light-years in diameter. It was created by winds from hot, massive stars (located in the center of the bubble) and supernova explosions and the interior is filled with tenuous, hot expanding gas. An object like N70 provides astronomers with an excellent opportunity to explore the connection between the life-cycles of stars and the evolution of galaxies.

Very massive stars profoundly affect their environment. They stir and mix the interstellar clouds of gas and dust, and they leave
their mark in the compositions and locations of future generations of stars and star systems.

From Wikipedia:

A superbubble is a cavity which is hundreds of light years across, and is filled with very hot gas blown into the interstellar medium by multiple supernovae and stellar winds. Our Solar System lies near the center of an old superbubble, known as the Local Bubble, whose boundaries can be traced by a sudden rise in dust extinction of stars at distances greater than a few hundred light years.