You are planning a trip in which you go in a spacecraft and travel at a constant velocity for exactly 8 months, as measured by a clock on board the spacecraft, and then return home at the same speed. The overall trip (without stoping) would have felt like 19 years for the people on earth. According to special relativity, how fast must you travel? (Hint: six months is the time one way from the astronaut's perspecve, think about the time round trip. 140 years is the time Earthians felt the roundtrip took) Answer to 4 sig gs, as a multiple of c. FOR EXAMPLE: 0.8473c would be inputted as 0.8473