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N70 Nebula in the Large Magellanic Cloud
N 70, N 70 Superbubble, Henize 70, DEM301
RA 5hr 43m 16.17s Dec -67° 50' 54.16"
170,000 light years
6.70 x 6.70 arcminutes
North is 0.0° right of vertical
November 17, 1999
Widefield view: N0912
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ABOUT THIS IMAGE:
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.
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.
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.