Statements (59)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:Nebula_Award
|
| gptkbp:composed_of |
gptkb:carbon_fiber
gptkb:Helium Oxygen Hydrogen |
| gptkbp:contains |
Ionized gas
|
| gptkbp:exhibits |
Bipolar outflows
|
| gptkbp:first_described_by |
gptkb:William_Herschel
|
| gptkbp:form |
Asymptotic Giant Branch star
|
| gptkbp:has |
gptkb:Cat's_Eye_Nebula
gptkb:Helix_Nebula gptkb:Ring_Nebula |
| https://www.w3.org/2000/01/rdf-schema#label |
Planetary Nebula
|
| gptkbp:is_a |
gptkb:astronomy
|
| gptkbp:is_associated_with |
Planetary nebulae catalog
|
| gptkbp:is_characterized_by |
Temperature variations
Color variations Spectral lines Emission lines Brightness variations Central star Morphological features Morphological diversity Chemical gradients Density variations Expansion velocity Ionization structure Shell of gas Shell structure |
| gptkbp:is_essential_for |
Understanding stellar evolution
|
| gptkbp:is_found_in |
gptkb:Milky_Way_galaxy
Galaxies Other galaxies |
| gptkbp:is_observed_in |
Visible light
|
| gptkbp:is_often_seen_in |
gptkb:Supernova
|
| gptkbp:is_part_of |
Stellar evolution
Life cycle of stars |
| gptkbp:is_related_to |
Star formation
Chemical enrichment Galactic evolution White dwarf star |
| gptkbp:is_studied_for |
gptkb:spectroscopy
Dynamics Chemical composition Kinematics Photometry Morphology Radiative transfer Stellar winds Astrobiology implications Mass loss processes Nuclear processes Planetary nebula formation theories |
| gptkbp:is_studied_in |
gptkb:astronomy
|
| gptkbp:is_surrounded_by |
Interstellar medium
|
| gptkbp:is_visible_from |
Hubble Space Telescope images
|
| gptkbp:lifespan |
10,000 to 20,000 years
|
| gptkbp:bfsParent |
gptkb:Dwarves
|
| gptkbp:bfsLayer |
4
|