Colin Stuart is an astronomy author who has talked to over half a million people about the universe. His books have sold more than 300,000 copies worldwide and been translated into nineteen languages.
Last year he helped the astronaut Tim Peake write his latest book and his TED-Ed video on time travel has been viewed 3 million times.
Colin's articles have appeared in The Guardian, New Scientist and Wall Street Journal. In recognition of his efforts to popularise astronomy, the asteroid (15347) Colinstuart is named after him and in 2014 he was awarded runner-up in the European Astronomy Journalism Prize. A Fellow of the Royal Astronomical Society, he's talked about the wonders of the universe on Sky News, BBC News and BBC Radio 5Live.