Same Beautiful Planetary Nebula
NGC 6543, Cat's Eye Nebula Imaged with Hubble
Credits: (left) NASA, ESA, J.P. Harrington and K.J.
Borkowski (U. Maryland)
(right) NASA, STScI, and Z. Levay
These two images of the Cat's Eye
Nebula were both taken with the Hubble Space Telescope.
The image on the left was taken in 1994 with the
Wide Field Planetary Camera 2 (WFPC2) in filters
that isolate hydrogen, oxygen, and nitrogen. The
image on the right uses a sulfur filter taken with
WFPC2 and combines it with hydrogen and oxygen filters
taken in 2002 with the Advanced Camera for Surveys
High Resolution Camera (ACS/HRC). (Note: the red
line in the image on the right is an artifact of
the HRC "occulting finger" used to block
out starlight on bright sources.)
NGC 6543, Cat's Eye Nebula Imaged with NOT
Credits: (left) R. Corradi (Isaac Newton Group)
and D. Goncalves (Inst. Astrofisica de Canarias)
(right) Nordic Optical Telescope and R. Corradi
(Isaac Newton Group of Telescopes, Spain)
The next two images are also of
the Cat's Eye Nebula, taken with the ground-based
Nordic Optical Telescope (NOT), located on the island
of La Palma, in the Canary Islands. Notice that
the wide field of view of the ground-based telescope
shows nebulosity out beyond the central region that
was imaged by Hubble. Both images were taken by
astronomer, Romano Corradi, in two narrow-band filters:
nitrogen and oxygen. The images differ in the assignment
of the color scheme used to show the differing filters.
The left image shows nitrogen in red and oxygen
in green and blue shades. The right image shows
oxygen in blue and nitrogen in red.
image of the Cat's Eye Nebula shows the full extent
of the ACS images that are not visible in the release
image or the HRC images on this page. Three more
pointings of the ACS Wide Field Camera would be
necessary to cover the faint outer shell structure.
Credit: NASA, STScI, and Z. Levay
Click on any image on this
page for a larger view.