Black holes are a big deal in our universe, but how big or deep are they? Thank you, Phoebe, for the great (and really difficult to answer well) question! Theme song, "Space Race," by Tubebackr (https://soundcloud.com/tubebackr). --- Support this podcast: https://anchor.fm/lewisexplainsspace/support

We know the Earth has a moon, but how many other moons are there in our solar system?  Thank you, Nora, for the great question! --- Support this podcast: https://anchor.fm/lewisexplainsspace/support

Our sun is a big star. Really big. But are there stars in the universe bigger than the sun? Thank you, Melody, for the great question! --- Support this podcast: https://anchor.fm/lewisexplainsspace/support