4 Planetary Nebulae (image) Rochester Institute of Technology Caption Four planetary nebulae are shown here from the first systematic survey of these dying, Sun-like stars in the solar neighborhood using the Chandra X-Ray Observatory. X-ray emission from Chandra is colored purple and optical emission from the Hubble Space Telescope is colored red, green and blue. The nebulae are NGC 6543, also known as the Cat's Eye, NGC 7662, NGC 7009 and NGC 6826. Credit X-ray: NASA/CXC/RIT/J.Kastner et al.; Optical: NASA/STScI Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.