This episode we are joined by Darren McKee, host of The Reality Check who asks, "What is the size of the universe?" If you have feedback or a topic suggestion, email us.

Darren McKee, host of The Reality Check has many questions. This episode he asks: "What is a light cone?" If you have feedback or a topic suggestion, email us.

On this episode we are joined by special guest and science enthusiast Ed Robertson. Ed is the frontman of Barenaked Ladies and wrote the theme song for Big Bang Theory. So naturally, we HAD to challenge Stuart to try and explain the Big Bang in 5 minutes with Ed in the house! If you have feedback or a topic suggestion, email us.

We're back! Announcing season two of 5 minutes with an astronomer. We start recording next week and should have a new set of shows for you shortly. In the meantime, Cristina and Pat have a discussion with Stuart about the recent headlines regarding the first image of a black hole.

Since this is the first episode, rather than asking Stuart a question, the crew introduces themselves and this new crossover podcast. If you have feedback or a topic suggestion you can email us.

This episode's question is: what are Kepler's laws of planetary motion? If you have feedback or a topic suggestion you can email us.

This episode's question is: why do we have seasons and are there seasons on other planets? If you have feedback or a topic suggestion you can email us.

This episode's question is: where did our moon come from and have we always thought this? If you have feedback or a topic suggestion you can email us.

Occasionally, rather than asking a specific question, we ask Stuart why he finds something interesting. This episode's question is: what is interesting about our moon? If you have feedback or a topic suggestion you can email us.

This episode's question is: what is the parallax? If you have feedback or a topic suggestion you can email us.