Star Space Activity: comparing larger stars to our Sun. Maths Skills/ Fun Space Lesson

Fun Space Lesson. Maths Skills.
Calculate diameter of larger stars. (by the way, all the maths in these tasks has been simlpfied and approximated so the calculations are doable without a calculator for most abilities, even key stage 3.
Identify stars from description of relative size and colour using printed pictures.
In our solar system, calculate distance of each planet from centre (from our sun), by comparing each planet to relative distance compared to earths distance from sun.
Theoretically, identify which planets would be engulfed if these larger stars replaced our sun at centre of our solar system. (diametres of stars must be halved to find star radius).
Again theoretically, identify moments in human history and estimate year they occured, and roughly caluclate how many years ago these events were in past. Match these historic events to the time it has taken for light we NOW SEE to travel to us from distance stars (using rough data of ‘light years’ distance stars are away). Looking at stars is like ‘looking at the past’.