Statements (58)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:observatory
|
| gptkbp:canBe |
Visible light
Their expansion rates Infrared_wavelengths |
| gptkbp:canEstablish |
Complex structures
Variability in brightness Color variations Polar outflows Ring structures |
| gptkbp:canLeadTo |
gptkb:Hubble_Space_Telescope
Spectroscopy White dwarf formation Galactic_chemical_evolution |
| gptkbp:formFactor |
Ejected material from a dying star
|
| gptkbp:hasArea |
Short lifespan
Bipolar structure Central star |
| gptkbp:hasInternationalClassification |
Emission nebula
|
| https://www.w3.org/2000/01/rdf-schema#label |
Planetary Nebula
|
| gptkbp:isA |
Astronomical object
|
| gptkbp:isAccessibleBy |
gptkb:Earth
gptkb:Telescopes |
| gptkbp:isAssociatedWith |
Planetary nebulae catalogues
|
| gptkbp:isCharacterizedBy |
Emission of ultraviolet radiation
High surface brightness Shell of gas and dust Symmetrical_shapes |
| gptkbp:isExemplifiedBy |
Morphological types
Spectral types |
| gptkbp:isFoundIn |
The Milky Way galaxy
|
| gptkbp:isKnownFor |
Ionized gas
Bright emission lines A variety of shapes Their intricate shapes |
| gptkbp:isOftenAccompaniedBy |
A phase in stellar life cycle
Their dynamics |
| gptkbp:isOftenMadeWith |
gptkb:Supernova_remnants
Astrophysical research Interstellar medium Star clusters Asymptotic giant branch stars A halo of ionized gas Thermal pulses |
| gptkbp:isOftenUsedIn |
Astrophotography
|
| gptkbp:isPartOf |
Stellar evolution process
The late stages of stellar evolution |
| gptkbp:isStudiedIn |
Astrophysics
Chemical_composition |
| gptkbp:isUsedFor |
gptkb:The_Local_Group
gptkb:Galactic_halo Stellar evolution Star-forming regions Transitional objects Various galaxies Various constellations |
| gptkbp:isVisitedBy |
Low to intermediate mass stars
|
| gptkbp:mayHave |
Heavy elements
Multiple shells |