NGC 6210: The Turtle in Space Planetary Nebula . ... Credit Copyright: R. Rubin (NASA/Ames) et al., ... Planetary nebula NGC 6210 may look like a giant space turtle, but it is actually much more massive and violent. ... NGC 6210 was investigated with the Hubble Space Telescope because it showed evidence of unusual relative abundances of nebular gas. The resulting detailed representative-color picture, above , shows jets of hot gas streaming through holes in an older, cooler shell of gas. ...