Aquila Planetary Nebulae
Astronomers using NASA's Hubble Space Telescope have obtained images of the planetary nebula NGC 6751. Glowing in the constellation Aquila like a giant eye, the nebula is a cloud of gas ejected several thousand years ago from the hot star visible in its center. 'Planetary nebulae' are shells of gas thrown off by stars of masses similar to that of our own Sun, when the stars are nearing the ends of their lives. The loss of the outer layers of the star into space exposes the hot stellar core. (NASA/Hubble Heritage Team via Reuters)
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