### If a year passes on a ship traveling 60 percent light speed how many years have passed on earth?

For the traveller, the trip takes 1 year, travelling at 60% the speed of light (or 0.6C). This would mean that he will perceive himself as have travelled 0.6 light years (a distance of about 9.46x1012km). To calculate the time that has elapsed on Earth, you can use this simplified equation: Spaceship Time = Earth Time x sqrt[1-(v/c)2] Spaceship Time = Earth Time x sqrt[1-(0.6c/c)2] Spaceship Time = Earth Time x sqrt[1-(0.6)2] Spaceship Time =…

### When was the first spaceship built?

The first spaceship was the Sputnik 1, built in the USSR and launched on October 4 1957. It was unmanned and was disintegrated upon retry of the Earth's atmosphere. The first manned spaceship was the Vostok 1, also launched by the USSR in 1961, carrying the cosmonaut Yuri Gagarin, the first man in space.

### When will a UFO spaceship come to earth?

Well first if it is a Spaceship, then it is no longer a UFO. UFO stands for Unidentified Flying Object. However in answer to your question, the answer is nobody knows. There has been and continues to be predictions made by Contactees (People who claim contact with Aliens) and by conspiracy theorists but as yet nothing has come to fruition.