TIM PEAKE:Hi, I'm Tim Peake. I'm an astronaut based here at the European Space Agency, in Germany. And from December 2015 to June 2016, I spent 6 months orbiting Earth on the International Space ...
What is our galaxy, the Milky Way, made of? Well, that is a really good question. I suppose the obvious answer, and it's right in part, is stars - some smaller than the sun and some bigger than the ...
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