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If the RR Lyrae stars in a globular cluster have average apparent magnitudes of +19, how far away (in pc) is the cluster? (Hints: See the following figure, and use the magnitude- distance formula: d = 10(my- Myt5)/5,) -6 Туре (classical) Cepheido 10 10 Туре I Cepheids 10 AR Lyrae stars 0.3 1 3 10 30 100 Pulsation period (days) pc Luminosity, L/L 4, apnyubew anpsqy

If the RR Lyrae stars in a globular cluster have average apparent magnitudes of +19, how far away (in pc) is the cluster? (Hints: See the following figure, and use the magnitude- distance formula: d = 10(my- Myt5)/5,) -6 Туре (classical) Cepheido 10 10 Туре I Cepheids 10 AR Lyrae stars 0.3 1 3 10 30 100 Pulsation period (days) pc Luminosity, L/L 4, apnyubew anpsqy

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If the RR Lyrae stars in a globular cluster have average apparent magnitudes of +19, how far away (in pc) is the cluster? (Hints: See the following figure, and use the magnitude–distance formula: 

d = 10(mV − MV+5)/5.)
If the RR Lyrae stars in a globular cluster have average apparent magnitudes of +19, how far away (in pc) is the cluster? (Hints: See the following figure, and use the magnitude- distance formula: d = 10(my - Myt5)/5,) -7 Туре (Classical) Cepheids -5 10 Туре I Cepheids 102 AR Lyrae stars 0.3 3 10 30 100 Pulsation perlod (days) pc Absolute magnitude Luminosity, L/ L
Transcribed Image Text:If the RR Lyrae stars in a globular cluster have average apparent magnitudes of +19, how far away (in pc) is the cluster? (Hints: See the following figure, and use the magnitude- distance formula: d = 10(my - Myt5)/5,) -7 Туре (Classical) Cepheids -5 10 Туре I Cepheids 102 AR Lyrae stars 0.3 3 10 30 100 Pulsation perlod (days) pc Absolute magnitude Luminosity, L/ L
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