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Which variable stars have pulsation periods between 1.5 hours and 1.2 days?
A. Cepheid variables
B. Protostars
C. RR Lyrae variables
D. Nebulas

Respuesta :

Informer
D. Nebulas is a cloud of dust,
B. Protostars & A. Cepheid variables have longer pulsation periods.
Whereas, C. RR Lyrae variables have pulsation periods between 1.5 hours and 1.2 days. So the answer is C.
saadhussain514

Correct answer choice is :


C) RR Lyrae variables


Explanation:


RR Lyrae variables are periodical unsteady stars, usually discovered in globular groups. They are accepted as regular lights to measure galactic distances, as a part of the infinite distance ladder. This class of unsteady star is identified after the prototype and glorious example, RR Lyrae. R Lyraes are vibrating parallel section aging stars of phantom class A or F, with a mass of around half the Sun's.

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