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Ghella [55]
3 years ago
8

Cepheid variables are valuable as distance markers because they are ________ and their period of brightening is directly related

to their ________________
Geography
1 answer:
makkiz [27]3 years ago
4 0

Answer:

Luminous; distance travelled

Explanation:

Cepheids, also called Cepheid Variables, are stars which brigthen and dim periodically. This behavior allows them to be used as cosmic yardsticks out to distances of a few tens of millions of light-years. a uniform function of their brightness. The reason Cepheids can be used to determine distance is because the are variable stars that change brightness according to a regular pattern Cepheid variable discovery allows one to know the true luminosity of a Cepheid by simply observing its pulsation period. This in turn allows one to determine the distance to the star, by comparing its known luminosity to its observed brightness.

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