Statements (31)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:astronomer
|
| gptkbp:causedBy |
gptkb:Doppler_effect
cosmic expansion |
| gptkbp:describes |
increase in wavelength of electromagnetic radiation
|
| gptkbp:explains |
gptkb:Edwin_Hubble
|
| gptkbp:firstObserved |
gptkb:Vesto_Melvin_Slipher
|
| gptkbp:form |
z = (λ_observed - λ_emitted) / λ_emitted
|
| gptkbp:hasUnit |
z (dimensionless)
|
| gptkbp:importantFor |
gptkb:Big_Bang_theory
|
| gptkbp:measures |
spectroscopy
recessional velocity of galaxies distance to astronomical objects |
| gptkbp:observedBy |
quasars
galaxies supernovae |
| gptkbp:opposedBy |
gptkb:blueshift
|
| gptkbp:relatedTo |
gptkb:astronomy
gptkb:cosmology gptkb:general_relativity gptkb:special_relativity gptkb:spectrometer light from distant objects |
| gptkbp:symbol |
z
|
| gptkbp:type |
gptkb:Doppler_redshift
gptkb:cosmological_redshift gravitational redshift |
| gptkbp:usedIn |
measuring Hubble constant
determining universe expansion rate |
| gptkbp:bfsParent |
gptkb:Postman
|
| gptkbp:bfsLayer |
5
|
| https://www.w3.org/2000/01/rdf-schema#label |
Redshift
|