TutorialA radio broadcast left Earth in 1925. How far in light years has it traveled?If there is, on average, 1 star system per 400 cubic light years, how many star systems has this broadcastreached?Assume that the fraction of these star systems that have planets is 0.30 and that, in a given planetarysystem, the average number of planets that have orbited in the habitable zone for 4 billion years is 0.85. Howmany possible planets with life could have heard this signal?Part 1 of 3To figure out how many light years a signal has traveled we need to know how long since the signal left Earth.If the signal left in 1925, distance in light years = time since broadcast left Earth.d = tnow - tbroadcastd =light yearsSubmitSkip (you cannot come back)

The time taken till now from the broadcast is 95 years. ( the distance traveled by light in one…

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To figure out how many light years a signal has traveled we need to know how long since the signal left Earth. If the signal left in 1925, distance in light years = time since broadcast left Earth. d = 'now - 'broadcast light years d =