What’s the universe made of? How is this connected to its age? What’s the connection between dark matter and dark energy?

What’s the universe made of? How is this connected to its age? What’s the connection between dark matter and dark energy?
Where do “weird” radio signals come from? Is this the first time we thought something weird was happening in space? Why does it make the news so much?
How do regular non-super-novas work? What’s the connection to white dwarves? Where do they happen and why should we care? I discuss these questions and more in today’s Ask a Spaceman!