Matter is anything that has mass and takes up space has a temperature that you can measure weighs more than one kilogram can be seen without a microscope @igreen

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?

The necleus of an atom is made up of what subatomic particles?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?