"We’ve had explosions and rocket launches outside on the museum reserve," he said.
"It’s been a lot of fun."
Inside, children could craft rockets and satellites from paper and string, and learn about Titan, Saturn’s largest moon. A new planetarium show about satellites was running, as was the "Tuhura Tuarangi Aotearoa in Space" science showcase.
"The key themes of space week are around being environmentally friendly, not just on earth but also in space ... and also how we can use space to understand our Earth better," Dr Mills said.