Ok hmm
Observer on earth sees spaceship zoom past. For the observer on earth, time for the people in the spaceship is going slower. By slower, I mean they may have aged 1 year, whereas people on earth have aged 10years. So therefore for every year that passes on earth, only .1 years pass on the spaceship, time is going slower. Also length contracts that's the obvious one. CSU notes make that distiction clear "a stationary observer will observe time going slower in the moving observer" or something to that effect.
Observer on earth sees spaceship zoom past. For the observer on earth, time for the people in the spaceship is going slower. By slower, I mean they may have aged 1 year, whereas people on earth have aged 10years. So therefore for every year that passes on earth, only .1 years pass on the spaceship, time is going slower. Also length contracts that's the obvious one. CSU notes make that distiction clear "a stationary observer will observe time going slower in the moving observer" or something to that effect.