Statements (28)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
scientific research
|
| gptkbp:alsoKnownAs |
gptkb:cosmic_distance_ladder
|
| gptkbp:appliesTo |
stars
quasars galaxies |
| gptkbp:enables |
measurement of Hubble constant
determination of the scale of the universe |
| gptkbp:field |
gptkb:astronomy
|
| gptkbp:firstDescribed |
early 20th century
|
| https://www.w3.org/2000/01/rdf-schema#label |
Distance ladder
|
| gptkbp:limitation |
systematic errors
calibration uncertainties |
| gptkbp:notableContributor |
gptkb:Edwin_Hubble
gptkb:Henrietta_Swan_Leavitt |
| gptkbp:purpose |
measuring astronomical distances
|
| gptkbp:relatedTo |
gptkb:cosmology
astrophysics |
| gptkbp:uses |
gptkb:Type_Ia_supernovae
gptkb:Tully-Fisher_relation redshift Cepheid variables standard candles surface brightness fluctuations parallax series of methods |
| gptkbp:bfsParent |
gptkb:Standard_candle
gptkb:Type_Ia_Supernova |
| gptkbp:bfsLayer |
7
|