Help With A Question (Time Dilation) (2 Viewers)

[ConHeo97]

An astronaut set out in a spaceship from Earth orbit to travel to a distant star in our galaxy. The spaceship travelled at a speed of 0.8 c. When the spaceship reached the star, the on-board clock showed the astronaut that the journey took 20 years.
An identical clock remained on Earth. What time in years had elapsed on this clock when seen from the astronaut’s spaceship?

 

[gautam97]

33 1/3 years

 

[hit patel]

33 1/3 years

From perspective of Astronaut. Time runs slower in relative motion. So Astronaut should see clock on earth run slower and therefore more time must pass on spaceship per unit of travel than on earth.
Agreeable?

 

[Squar3root]

From perspective of Astronaut. Time runs slower in relative motion. So Astronaut should see clock on earth run slower and therefore more time must pass on spaceship per unit of travel than on earth.
Agreeable?

yes