This week's "Ask A Spaceman" episode explores the radiation echo of the Big Bang that formed our universe. While we can't see it with our eyes, this radiation surrounds us everywhere.

Space-time isn't expanding into anything because general relativity is what we call a background independent theory. Chanda Prescod-Weinstein sets out to explain what this means ...

It is 50 years since Jim Templeton's "Solway Spaceman" photo made global headlines, ... No, said Dr Clarke, who has seen the black and white film of the aborted launch.