The Discussion: The reason we have leap years; a look at Ad Astra, Lucy in the Sky and Picard; and the history of the Stonewall Riots (don't think it's just astronomy here – you get a fully rounded education, dear listener); and a look at your reviews and emails.

The News: Rounding up the space exploration news this month we have:

• Direct TV's ticking timebomb in space
• DARPA's XS-1 reusable spaceplane gets cancelled
• ESA's Solar Obiter heads off to the sun
• NASA ask you to vote for the official name of their Mars 2020 rover (www.mars.nasa.gov/mars2020/participate/name-the-rover/)
• NASA's costs for the 2024 moon landing are imminent

Main news story: SpaceX gears up for crewed spaceflight following successful abort tests

The Electromagnetic Spectrum: How parts of the EMS outside visible light were discovered, who discovered them and what that means for us today.

Q&A: Have the crew of the ISS (or any other spaceflight with room to try it) propelled themselves through their craft using flatulence? From Brychan James from Wales on Twitter (@BrychanJames)