Compass and Scale Image of NGC 2818
NGC 2818
10,400 light-years (3.2 kiloparsecs)
This image is roughly 2 arcminutes (6.5 light-years or 2 parsecs) wide.
This image was created from HST data from proposals 11956: K. Noll, Z. Levay, M. Mutchler, L. Frattare, C. Christian, F. Hamilton, and H. Bond (STScI/AURA)
F502N ([O III]), F656N (H-alpha), and F658N ([N II])
The image is a composite of separate exposures made by the WFPC2 instrument on the Hubble Space Telescope. Three filters were used to sample narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:
Blue: F502N ([O III])
Green: F656N (H-alpha)
Red: F658N ([N II])
Illustration Credit:: NASA, ESA, and Z. Levay (STScI);
Science Credit:: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)