Glowing in the constellation Aquila like a giant eye, the nebula NGC 6751, is a cloud of gas ejected several thousand years ago from the hot star visible in its centre. The hubble observations were obtained in 1998 with the Wide Field Planetary Camera 2 (WFPC2) by a team of astronomers led by Arsen Hajian of the US Naval Observatory in Washington DC. The nebula shows several remarkable and poorly understood features. Blue regions mark the hottest glowing gas, which forms a roughly circular ring around the central stellar remnant. Orange and red show the locations of cooler gas.
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