A galaxy is observed to recede from Earth with an approximate speed of 0.81c. Approximately how far d from Earth is this galaxy? Give an answer in units of megaparsecs (Mpc). d = ? Mpc How long ago t was the light that we see emitted by the galaxy? Give an answer in units of years. t = ? years
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A galaxy is observed to recede from Earth with an approximate speed of 0.81c.
Approximately how far d from Earth is this galaxy? Give an answer in units of megaparsecs (Mpc).
d = ? Mpc
How long ago t was the light that we see emitted by the galaxy? Give an answer in units of years.
t = ? years
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