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gptkbp:instance_of
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gptkb:star
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gptkbp:bfsLayer
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4
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gptkbp:bfsParent
|
gptkb:Henrietta_Swan_Leavitt
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gptkbp:affects
|
galaxy distance scales
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gptkbp:are
|
important for measuring cosmic distances
often studied in variable star research.
unstable stars
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gptkbp:associated_with
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star formation regions
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gptkbp:average_temperature
|
approximately 4,500 to 6,000 K
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gptkbp:can_be
|
found in the Milky Way
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gptkbp:contribution
|
Hubble constant determination
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gptkbp:discovered_by
|
gptkb:Henrietta_Swan_Leavitt
|
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gptkbp:example
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gptkb:RS_Puppis
gptkb:Beta_Lyrae
gptkb:Delta_Cephei
gptkb:Zeta_Geminorum
gptkb:W_Virginis
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gptkbp:exhibits
|
light curve variations
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gptkbp:has_luminosity
|
period-luminosity relationship
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gptkbp:have
|
high luminosity
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|
https://www.w3.org/2000/01/rdf-schema#label
|
Cepheid variables
|
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gptkbp:influence
|
stellar population studies
|
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gptkbp:is_characterized_by
|
regular pulsation
|
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gptkbp:is_essential_for
|
gptkb:spacecraft
extragalactic astronomy
|
|
gptkbp:is_evaluated_by
|
age of galaxies
|
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gptkbp:is_found_in
|
galaxies
globular clusters
open clusters
|
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gptkbp:is_observed_in
|
gptkb:Hubble_Space_Telescope
nearby galaxies
|
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gptkbp:is_recognized_by
|
gptkb:the_Magellanic_Clouds
|
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gptkbp:is_used_by
|
gptkb:observatory
|
|
gptkbp:is_used_to
|
calibrate other distance indicators
|
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gptkbp:lighting
|
up to several magnitudes
|
|
gptkbp:mass
|
5 to 20 solar masses
|
|
gptkbp:named_after
|
gptkb:Cepheus_constellation
|
|
gptkbp:orbital_period
|
from a few days to several weeks
|
|
gptkbp:origin
|
post-main sequence
|
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gptkbp:related_to
|
gptkb:Type_Ia_supernovae
|
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gptkbp:type
|
pulsating star
|
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gptkbp:used_in
|
distance measurement
|