3. There is a bell at the top of a tower that is 45 m high. The bell weighs 64 kg. The bell has joules of potential energy.

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?