Canadian astronaut David Saint-Jacques. (Image: www.canada.ca) Kids at a local middle school will never have to wonder why the sky is blue but space is black because an astronaut explained it to them. The Junior Astronauts program designs activities for youth in grades six to nine in science and technology, fitness and nutrition, and communications and teamwork to interest them in a future in science, technology, engineering and math. Saint-Jacques is an engineer, astrophysicist and family doctor. On December 3, 2018, he flew to the International Space Station and spent 204 days in space, the longest Canadian mission to date. Saint-Jacques told his audience to take care of themselves, especially when it comes to physical and mental health. He said they might feel young and like they will be healthy forever but they still need to take care of what they eat, much they sleep, and to exercise at least a little bit.