For the ramp on the left blank jaws of work must be done to drag the box to the top of the ramp this means that blank in a force are required to drag the box on the right of the second ramp to the same height

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?