When was the international space station launched

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?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Both independent and dependent clauses