 The Hubble telescope took this image in 1998. It shows faint arcs and filaments embedded within the diffuse gas of the nebula's smooth bowtie lobes. The nebula's shape appears to have been created by very fierce 500,000 km per hour winds, blowing gas away from the dying central star, that's 310,000 miles per hour. This rapid expansion of the nebula has made it one of the coldest known regions in the universe. Huge waves are sculpted into this two-lobed nebula. It harbors one of the hottest stars known, and its powerful stellar winds generate waves 100 billion km high. The waves are caused by supersonic shocks, formed when the local gas is compressed and heated in front of the rapidly expanding lobes. The atoms caught up in the shock emit the spectacular radiation seen in this image.