Spaceman Chris Hadfield wants your questions
Stuck on that one niggling science homework question or have you ever wanted to know what Northern Ireland looks like from space?
World-famous spaceman and Twitter fantaic Chris Hadfield is set to answer school children's science-based questions on social media sites as he embarks on his book tour, The Canadian astronaut once tweeted a picture of Belfast, quizzing followers about the story behind the city's name as well as tweeting the first message from space in Irish - Tá Éire fíorálainn!" (Ireland is exquisite). He also added: "Land of green hills dark beer. With Dublin glowing in the Irish night."
The rocket scientist, whose daughter attended Trinity College in Dublin, sent his Northern Irish fans into a frenzy after he tweeted the picture of Belfast to his 1.2m followers.
Thousands of young, inquisitive minds have been invited to send in their questions to Mr Hadfield using the #personalrocketscientist hashtag on social media. Fans can either tweet their question as a photo or submit a video on Instagram.
Over the course of the 10-day book tour, entitled YOU ARE HERE: Around the world in 92 minutes, he will personally respond to some of the most curious and interesting questions with a personalised 15-second video clip from December 7 to 16.
"To me, science is just formalised curiosity," he said.
"A way of figuring something out when I don't understand it. The questions my kids asked me - why is the sky blue? Where does the sound go when it stops? Why is it cold in winter? Kids are scientists by nature, curious about everything."
He is one of the world's most accomplished astronauts and is the author of the bestseller, An Astronaut's Guide to Life on Earth.
Hadfield most recently served as Commander of the International Space Station where, while conducting a record-setting number of scientific experiments and overseeing an emergency spacewalk, he gained worldwide acclaim for his breathtaking photographs and educational videos about life in space.
His music video, a zero-gravity version of David Bowie's "Space Oddity," received over 10 million views in its first three days online.