The Discussion: Enjoying the delights of July's skies, writing articles for Astronomy magazine, STEM education and Paul becomes a European Space Agency ambassador.

The News: In the news we have the Rosetta spacecraft's approach to the almost unpronounceable comet Churyumov Gerasimenko – revealed to be a binary comet, and the Very Large Telscope in Chile takes a 2.5 year study of a supernova to crack the riddle of how dust is created and survives the extreme temperatures of its birth.

The 5 Minute Concept: In this month's 5MC, Paul looks at the summer phenomenon of noctilucent clouds and asks 'why is there no record of them before 1885'?

The Interview: We welcome back the General Secretary of the International Astronomical Union, Professor Thierry Montmerle to tells us about the International Year of Light, the IAU's new look communications strategy and their new project to allow the public to name exoplanets and their host stars.

Q&A: Listeners' questions via email, Facebook & Twitter take us on a journey into the astronomy issues that have always plagued our understanding or stretched our credulity. This month Ralph & Paul answer:

• Oolaaa Martian overlords. Where in your opinions does the solar system truly end. Thanks, your faithful servant Lee? Lee Garner from Norwich, UK.
• What's a Vampire Star? @TweetsByLou via Twitter

And we finish with the winners of last month's competition to win three DVD copies of the new film Gagarin – First in Space, and a copy of the book Yuri Gagarin – The First Spaceman.