2008 saw the release of two space sets through the LEGO Factory theme. Star Justice and Space Skulls were fan-designed sets released as special edition sets available only through LEGO. In 2017, Lego Creator had two space related sets, the "Robot Explorer" and the "Space Shuttle Explorer". Lego Creator Expert released a set of the Apollo 11 Lunar Lander in 2019 to commemorate the 50th anniversary of the first moon landing, and a model of the Space Shuttle Discovery was released in early 2021, based on the STS-31 mission which deployed the Hubble Space Telescope.