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(Solved): P2.3 At t=0, an alien spaceship passes by the earth: let this be event A. At t=260Gm (according to s ...
P2.3 At
t=0, an alien spaceship passes by the earth: let this be event
A. At
t=260Gm(according to synchronized clocks on earth and Mars) the spaceship passes by Mars, which is 100 Gm from the earth at the time: let this be event B. (Note that 18 Gm of time
=1.8\times 10^(10)m~~1minute
