At a certain distance, the sound intensity level of a dog's bark is 59 dB. At that same distance, the sound intensity of a rock concert is twenty thousand times that of the dog's bark. What is the sound intensity level of the rock concert

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?