A generalization that uses logical reasoning to make sense of observations is..

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?

How many neutrons does plutonium -196 with an atomic number of 78.

What is the difference between mass density and weight density?