The activities within this resource focus on three topics: Cepheid variable stars; a power system for the Mars Science Laboratory; and locating celestial objects using the Stellarium software. The Cepheid variable activity is suitable for GCSE or Post-16 physics and astronomy. Students need to be able to interpret data from a log graph and use the log function on their calculator. The objective is to find the distance to the six variable stars listed. The Mars rover activity allows students to compare the power efficiency of two different power systems – a solar array and a radioisotope thermoelectric generator. Students must draw a Sankey diagram for each system and provide a recommendation on which to use. The activity using Stellarium is most suitable for GCSE Astronomy but could be used in a mathematics lesson on coordinate systems. As part of the plenary, students are asked to state the advantages and disadvantages of three different coordinate systems.