Sleepy Facts About the Universe

Why Does the Age of the Milky Way Deepen the Fermi Paradox? - The Head Start Argument for Interstellar Probes | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! The Fermi Paradox is often dismissed as a simple problem of dist

Is Planetary Habitability a Place or a Time? - The Faint Young Sun Problem and Early Earth | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! The familiar diagram of a star's habitable zone is a snapshot wi

Why Doesn't Cold Space Prevent Chemical Reactions? - Chemical Pathways in the Cold Interstellar Medium | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! In the vast, near-empty reaches between stars, atoms can drift f

Why Are Exoplanets Rarely Seen Directly? - Detecting Exoplanets Through Stellar Influence | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! Finding a planet orbiting another star is like trying to see a c

Where Does Space Begin? - The Atmospheric Gradient and the Human Need for Boundaries | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! We often speak of "going to space" as if crossing a sharp thresh

What Determines the Shape of an Asteroid? - The Forces That Shape Small Worlds | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! We know that planets are round, pulled into spheres by the relen

What Is the Moist Greenhouse Limit? - Venus and the Memory of an Ocean | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! Venus is often called Earth's twin, but calling it that feels al

Does the Moon Actually Rotate? - The Mechanics of the Moon's Spin | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! The most common thing said about the Moon is also the most funda

What Happens If You Fall Into a Gas Giant? - Inside the Fluid Interior of a Gas Giant | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! When we look at an image of Jupiter, we see a striped sphere wit

Why Does a Massive Rocky Planet Not Grow in Proportion to Its Mass? - The Radius Valley and Planetary Atmospheric Loss | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! When we imagine a rocky planet heavier than Earth, our intuition

What Does the Sun Look Like in Invisible Light? - Mapping the Multi-Temperature Solar Atmosphere | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! The Sun you picture when you close your eyes is almost certainly

Why Did the Solar System Split Into Rocky Worlds and Gas Giants? - The Solar Nebula and the Origin of the Planets | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! The solar nebula was a rotating disk of gas and dust that existe

Why Did the Solar System Split Into Rocky Worlds and Gas Giants? - The Solar Nebula and the Origin of the Planets | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! The solar nebula was a rotating disk of gas and dust that existe

How Do Astronomers Define the Boundary of a Galaxy? - The Nested Boundaries of Galaxies | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! The edge you see in a photograph of a galaxy is not a physical p

What Happens When You Trace Black Hole Radiation Backward? - The Robustness of the Black Hole Thermal Spectrum | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! A black hole appears from a distance to be the calmest object in

How Does Matter Actually Fall Into a Black Hole? - The Cosmic Vacuum Cleaner Myth | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! If the Sun were instantly replaced by a black hole of the exact

What Lies Beneath the Sulfuric Acid Clouds of Venus? - Phosphine and the Search for Life in Venusian Clouds | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! Venus is the brightest planet in our sky, but for centuries it h

Why Is a Supernova Flash Different From a Galaxy's Glow? - The Physics of a Supernova's Brilliant Flash | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! When a single star explodes in a distant galaxy, it can briefly

How Do Astronomers Identify True Stellar Families? - The Life and Dissolution of Star Clusters | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! When we look up at a familiar pattern like the Big Dipper, it is

How Does a Cold Dark Cloud Become a Star? - From Molecular Cloud to Main Sequence | Sleepy Facts About the Universe

Got something to say to this podcast? Send a voicemail, and you might hear yourself on the next episode! Every star in the universe begins in extreme cold and darkness,