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Star Trails: From Backyard Astronomy to Cosmic Wonder

Star Trails: From Backyard Astronomy to Cosmic Wonder

Single Malt Sky 121 episodes Nov 8, 2026

Star Trails is a weekly astronomy podcast that starts in your backyard and expands to the edge of the universe. Each episode offers a guide to the night sky across North America, covering constellations, planets, moon phases, and celestial events. It also explores the science, history, and perspective of astronomy, from ancient skywatchers to modern spacecraft, revealing the beauty and mystery of the cosmos.

Episodes

The Case of the Martian Meteorite
The Case of the Martian Meteorite Nov 8, 2026 32:09 Somewhere in the Sahara Desert, someone picked up an unusual, rose-colored stone. It wasn't particularly impressive to look at, but scientists would eventually discover that this little rock had traveled across millions of miles of space, survived a violent escape from another planet, and preserved evidence of events more than four billion years old.It came from Mars.In this episode, we're investi
The Darkroom at the Edge of the Universe
The Darkroom at the Edge of the Universe Nov 1, 2026 29:17 There was a time when photographing a distant galaxy required enormous telescopes, glass photographic plates, exotic chemistry, and almost unimaginable patience. But capturing the light was only half the battle. Sometimes the greatest discoveries were hiding inside the photographs themselves, waiting for someone clever enough to bring them into view.This week we explore the extraordinary work of D
The Death of Andromeda
The Death of Andromeda Oct 18, 2026 20:45 The Andromeda Galaxy is not disappearing, exploding or running out of stars. But it may be entering something astronomers recognize as a kind of galactic old age: it is gradually losing the ability to make new ones.Using the Hubble Space Telescope, researchers reconstructed 500 million years of star formation across two-thirds of Andromeda's disk. They found a long decline, followed by an especial
The Moon That Sends Us Its Ocean
The Moon That Sends Us Its Ocean Oct 11, 2026 34:06 Saturn has a moon with a hidden ocean, and that ocean is spraying samples of itself into space.Enceladus is only about 310 miles wide, but beneath its brilliant shell of ice lies a global saltwater ocean warmed by the pull of Saturn. Along its south pole, enormous fractures release water vapor and tiny frozen grains. NASA's Cassini spacecraft flew through that spray and found salts, organic compou
A Black Hole Is Pointing at Us
A Black Hole Is Pointing at Us Oct 4, 2026 29:00 A black hole in our galaxy appears to be aiming a relativistic jet almost directly toward Earth. That sounds like a reasonably good opening line for October.The object, IRAS 18293−0941, is a binary system about 12,000 light-years away. A stellar-mass black hole is feeding on material from a massive companion star and launching jets at no less than roughly two-thirds the speed of light. Because one
There Was a Planet That Swallowed a Moon
There Was a Planet That Swallowed a Moon Sep 27, 2026 32:36 What if Venus once had a moon, and then destroyed it?A new study suggests that under plausible conditions, an ancient Venusian moon could have slowly migrated inward, crossed the Roche limit and ultimately been torn apart or swallowed by the planet. And Venus may not be the only hungry object in our cosmic neighborhood: another recent study explores whether the young Sun could have consumed a supe
Dyson Spheres: The Heat Has to Go Somewhere
Dyson Spheres: The Heat Has to Go Somewhere Sep 13, 2026 23:44 What if the first evidence of an advanced alien civilization isn’t a message, but a star whose energy books don’t quite balance?This week, we explore the strange history and surprisingly real science of Dyson spheres, from Olaf Stapledon and Freeman Dyson to the unforgettable Star Trek: The Next Generation episode “Relics.” We’ll learn why a vast swarm of orbiting collectors makes more sense than
Rivers Through the Dark
Rivers Through the Dark Sep 6, 2026 27:15 Galaxies carry the evidence of their past. When the Milky Way captures a dwarf galaxy or tears apart a globular cluster, it leaves behind long, ghostly ribbons of stars called stellar streams. These streams preserve the history of ancient collisions, and their shapes may trace the invisible dark matter surrounding a galaxy.This week, we follow the stellar wreckage left behind by galactic cannibali
Little Red Dots at Cosmic Dawn
Little Red Dots at Cosmic Dawn Aug 30, 2026 27:22 The James Webb Space Telescope has uncovered hundreds of tiny red points in the early universe. They are extraordinarily compact, unexpectedly bright and strangely quiet in the X-ray and radio wavelengths where an active black hole should reveal itself.Astronomers call them “little red dots,” but that modest nickname conceals one of the most intriguing mysteries of the Webb era.In this episode, we
Did the Milky Way Flip?
Did the Milky Way Flip? Aug 16, 2026 35:00 The Milky Way looks permanent from our place inside it, a great band of stars stretching across the night sky. But new research suggests our galaxy may once have been oriented in a completely different direction, perhaps reorienting by more than 90 degrees during its violent youth.This episode explores the evidence for the Milky Way's possible ancient flip and, even more remarkably, how astronomer
When Black Holes Twist Spacetime
When Black Holes Twist Spacetime Aug 2, 2026 38:17 What happens when a black hole spins? According to general relativity, it doesn't simply rotate in space, it actually drags spacetime around with it.This episode explores the strange phenomenon known as frame dragging, from its first predictions more than a century ago to new observations that may let astronomers watch it at work around supermassive black holes. We'll visit a distant black hole wh
Listening to the Heartbeat of the Milky Way
Listening to the Heartbeat of the Milky Way Jul 19, 2026 27:00 Most amateur astronomers spend their nights collecting light. But what if you could study our galaxy without looking through a telescope at all?In this episode, we sit down with amateur astronomer and radio enthusiast Hap Griffin to explore the fascinating world of backyard radio astronomy. Using a homemade radio telescope consisting of a recycled microwave dish, and less than $100 worth of electr

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