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Loading contentThe forms of galaxies, the types of active galactic nucleus, and the AGN unification model — spiral, elliptical, Seyfert, radio galaxy, blazar, and more.
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| Name | Type | ID |
|---|---|---|
| Barred Spiral Galaxy | Galaxy morphology | galaxy_morphology:barred-spiral |
| BL Lac Object | AGN type | agn_type:bl-lac-object |
| Dwarf Galaxy | Galaxy morphology | galaxy_morphology:dwarf |
| Elliptical Galaxy | Galaxy morphology | galaxy_morphology:elliptical |
| Irregular Galaxy | Galaxy morphology | galaxy_morphology:irregular |
| Lenticular Galaxy | Galaxy morphology | galaxy_morphology:lenticular |
| LINER | AGN type | agn_type:liner |
| Peculiar & Interacting Galaxy | Galaxy morphology | galaxy_morphology:peculiar |
| Radio Galaxy | AGN type | agn_type:radio-galaxy |
| Ring Galaxy | Galaxy morphology | galaxy_morphology:ring |
| Seyfert Galaxy | AGN type | agn_type:seyfert-galaxy |
| Spiral Galaxy | Galaxy morphology | galaxy_morphology:spiral |
| The Unified AGN Model | AGN model | agn_model:unified-agn-model |
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.
European missions, observatories, and space science imagery.