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Interacting galaxies · evidence and sources

Penguin and Egg Galaxies

A distorted spiral and its compact companion reveal a galactic encounter through glowing dust and stretched stellar arms.

Also known as Arp 142, NGC 2936, NGC 2937.

Catalog Position basis, the same label the app shows on the selection card.

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Every aspect, with its origin

One record per aspect. The origin says what kind of thing each value is; the source says where it came from; the limit says what it cannot tell you.

ObservedCatalogComputedReconstructedIllustrativeUndocumented
Position Catalog

Registered image field

J2000 image-field center RA 9.6 h, Dec 2.8°. Field 2 × 2.1 arcminutes; north 18.5° right of vertical.

SourceWebb NIRCam + MIRI
EpochJ2000
LimitThe image field center is not necessarily a galaxy nucleus.
Physical data Catalog

Adopted distance

Approximately 326,000,000 light-years.

SourcePublished distance context
LimitAn approximate reference distance; distances to individual points within the image are not supplied by the observation.
Appearance Reconstructed

Observation-derived appearance

The image includes unrelated background galaxies. Both interacting galaxies share an approximate reference distance; their relative depth is illustrative. Small foreground or background sources inside the selected apertures may remain; they do not have individually measured depths. Projected structure follows the credited observation at its published angular scale and an approximate adopted distance. Shallow depth is illustrative, not measured tomography. The source palette is preserved; brightness is adjusted for the navigable view.

SourceNASA, ESA, CSA, STScI
Appearance Reconstructed

Live telescope view: Webb MIRI · mid-infrared

Dusty knots outline the distorted Penguin while the star-dominated Egg becomes much fainter. Publisher release: 12 July 2024; this is not the observing epoch.

SourceNASA, ESA, CSA, STScI
MethodPublisher AVM tangent-plane coordinates, resampled to the original destination field; approximate display registration.
LimitThis observation covers approximately 76% of the destination’s rectangular source field. Outside its footprint, the original observation remains visible. Field edges and detector gaps are not physical boundaries. Source palettes are display colors; shallow scene depth is illustrative, not measured tomography.
Appearance Reconstructed

Live telescope view: Webb NIRCam · near-infrared

Trace starlight in both galaxies and compare it with the dust-bright mid-infrared view. Publisher release: 12 July 2024; this is not the observing epoch.

SourceNASA, ESA, CSA, STScI
MethodPublisher AVM tangent-plane coordinates, resampled to the original destination field; approximate display registration.
LimitThis observation covers approximately 100% of the destination’s rectangular source field. Outside its footprint, the original observation remains visible. Field edges and detector gaps are not physical boundaries. Source palettes are display colors; shallow scene depth is illustrative, not measured tomography.

What is not measured

  • Appearance: a reconstruction from measurements, not a direct observation. Observation-derived appearance. The image includes unrelated background galaxies. Both interacting galaxies share an approximate reference distance; their relative depth is illustrative. Small foreground or background sources inside the selected apertures may remain; they do not have individually measured depths. Projected structure follows the credited observation at its published angular scale and an approximate adopted distance. Shallow depth is illustrative, not measured tomography. The source palette is preserved; brightness is adjusted for the navigable view.
  • Appearance: a reconstruction from measurements, not a direct observation. Live telescope view: Webb MIRI · mid-infrared. This observation covers approximately 76% of the destination’s rectangular source field. Outside its footprint, the original observation remains visible. Field edges and detector gaps are not physical boundaries. Source palettes are display colors; shallow scene depth is illustrative, not measured tomography.
  • Appearance: a reconstruction from measurements, not a direct observation. Live telescope view: Webb NIRCam · near-infrared. This observation covers approximately 100% of the destination’s rectangular source field. Outside its footprint, the original observation remains visible. Field edges and detector gaps are not physical boundaries. Source palettes are display colors; shallow scene depth is illustrative, not measured tomography.

Sources cited

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