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SOLVED: If these stars are both 500 light-years away from earth, how will their apparent brightness compare? (Express your answer as an integer) Ba/Bb= ?And How will the apparent brightness of these
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astrophysics - Is the sound horizon 500 thousand light years or 500 million light years? - Astronomy Stack Exchange
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Mysterious object 500million light years away baffles scientists after transmitting signals that hit Earth every 16 days – The US Sun | The US Sun
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