I would choose the activity ‘making a star’. This is a real hands on activity and lots of room for differentiation within the lesson. I would begin with some star wars music in the background while the children share any songs or rhymes they know with the word star in them. Have you ever looked up at the stars at night, what have you noticed. Do the stars make shapes? Are some brighter than others?
I will them show them some images of constellations, the plough, orions belt etc.
Using black card with the glued on template the children will create the plough constellation in pairs. Tin foil will be used for the stars and wool for the distance. I will have the distances written on the templates the children are using so all they need to do is use a ruler to measure. I like the idea of hanging the constellation on the ceiling and under their desks so they get the idea of how stars appear from different directions.