Multiple Choice
How far is the galaxy from the Earth if it recedes from Earth at a speed v = 0.5 c ?
(Use H0 = 0.022 m/s · lightyear for Hubble's constant.)
A) 22.7 lightyears
B) 7.2 × 108 lightyears
C) 6.8 × 109 lightyears
D) 1.3 × 107 lightyears
Correct Answer:
Verified
Correct Answer:
Verified
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