Find how long did it take for a message sent from earth

Reference no: EM13517954

1) How long did it take for a message sent from Earth to reach the first astronauts on the way to the moon when they were still 12100 km away from the moon?

2) How long will it take for a message from Earth to reach the first astronauts who arrive on Pluto; assume Pluto is at its closest approach to Earth (4.20×107 km)?

Reference no: EM13517954

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