Happy Pluto Day!

Have your folks send your questions to [email protected].

Gravity shapes everything in our solar system, from rocky debris to the motion of moons. In this episode, we explore how asteroid belts form, why they are made of leftover building blocks instead of broken planets, and how Jupiter’s gravity plays a key role. Then we imagine what might happen if Earth gained a second moon, and how that could affect tides, climate, seasons, and even the night sky.

What would happen if our Sun traveled through a wormhole to another part of the galaxy? In this episode, we explore this big science question using real astronomy and a little imagination. We talk about how Earth’s days and seasons work, what the galaxy is like beyond our neighborhood, and how the night sky might change if our solar system moved. Along the way, listeners learn about wormholes, stars, and why our place in the Milky Way is just right for life.

Are there green stars? In this episode, we explore a question that sounds simple—but has a surprising answer. Learn how star colors are linked to temperature, why we see some stars as red, blue, or yellow, and why green stars don’t appear green to us—even when they do emit green light! We also talk about visible light, wavelengths, how our eyes interpret color, and what the Sun’s color really is. By the end, you’ll understand what a G-type star is, how stars are classified, and why the night sky doesn't shine in green.

What might happen if you left the universe? In this episode, we explore the mysteries of cosmology, from the limits of the observable universe to the mind-bending idea of multiverses. We break down concepts like space, time, dark energy, and Max Tegmark’s levels of parallel universes—while reminding ourselves that some of these are still just ideas waiting for ways to be tested.