A Cepheid variable has a period of 17 days and an average apparent magnitude of 23. Find its distance from us. The absol
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A Cepheid variable has a period of 17 days and an average apparent magnitude of 23. Find its distance from us. The absol
A Cepheid variable has a period of 17 days and an average apparent magnitude of 23. Find its distance from us. The absolute magnitude of the Sun is 4.83. ОЗМрс 3 0.3 Mpc O 300 Mpc O 30 Mpc
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