The most intriguing places in our solar system might not be planets at all. This week we turn our attention to some of the most fascinating and unusual worlds in our solar system: its moons.

For most of human history, we assumed moons were quiet, lifeless companions like our own. But as spacecraft ventured deeper into the outer solar system, a very different picture emerged.

Some moons erupt with volcanoes. Some hide vast oceans beneath miles of ice. Some have weather, rivers, and lakes, made not of water, but methane. And a few of them may have the ingredients necessary for life.

We’ll explore these strange worlds, from Io and Europa to Titan and Enceladus, and take a closer look at what makes them so dynamic. Along the way, we’ll revisit Pluto and its surprisingly complex family of moons, and consider why the outer solar system is teeming with these objects while the inner planets remain mostly bare.

Finally, we’ll step outside for a guided tour of the night sky for the week of March 22–28, including a waxing crescent Moon, brilliant Venus in the evening sky, Jupiter and its Galilean moons, and the arrival of spring’s galaxy season. We'll also check in on our book discussion with a look at Chapters 8 and 9 in Nightwatch.

Connect with us on Bluesky @startrails.bsky.social or YouTube @TheStarTrailsPodcast.

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In 2006, a group of astronomers gathered in Prague and made a decision that shocked the world: Pluto was no longer a planet.

But the story of Pluto is far more complicated—and far more fascinating—than that single vote.

In this episode of Star Trails, we reopen the case. From Percival Lowell’s search for the mysterious “Planet X” to Clyde Tombaugh’s painstaking discovery using a blink comparator, we trace the strange history of the ninth planet. We’ll examine the discoveries that led to Pluto’s controversial demotion, meet the astronomers who helped redefine what a planet is, and follow NASA’s New Horizons spacecraft as it revealed Pluto to be a dynamic and surprisingly complex world.

Along the way we explore Pluto’s bizarre orbit, its giant moon Charon, its icy surface and hidden mysteries—and the poetic moment when the ashes of its discoverer finally returned to the distant world he found.

And later in the show, we step outside for a look at the night sky for the week of March 15–21, including dark skies near the new moon, the arrival of the vernal equinox, brilliant Jupiter in Gemini, and a few deep-sky treasures worth tracking down with your telescope.

Connect with us on Bluesky @startrails.bsky.social or YouTube @TheStarTrailsPodcast.

If you’re enjoying the show, consider sharing it with a friend! Want to help? Buy us a coffee! Also, check out music made for Star Trails on our Bandcamp page!

Podcasting is better with RSS.com! If you’re planning to start your own podcast, use our RSS.com affiliate link for a discount, and to help support Star Trails.

This week we leave the rocky inner planets behind and journey into the deep cold of the outer solar system. From the storm-wracked atmosphere of Jupiter to the ringed elegance of Saturn and the mysterious ice giants Uranus and Neptune, these distant worlds reveal how strange and varied our planetary neighborhood truly is.

Along the way we explore how the solar system formed, why the inner planets are rocky while the outer planets became giants of gas and ice, and why the distant ice giants remain some of the least explored worlds we know.

Later in the episode we share a personal observing report after attempting to spot a SpaceX rocket launch from hundreds of miles away, offer up tips on how you might see one yourself, and we'll walk through what’s visible in the night sky for the week of March 8–14.

We’ll also continue our NightWatch book club with Chapters 6 and 7, exploring the realities of visual astronomy and how patient observation reveals the subtle beauty of the deep sky.

Mentioned in this episode:

• Spaceflight Now website

Connect with us on Bluesky @startrails.bsky.social or YouTube @TheStarTrailsPodcast.

If you’re enjoying the show, consider sharing it with a friend! Want to help? Buy us a coffee! Also, check out music made for Star Trails on our Bandcamp page!

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In this milestone 100th episode of Star Trails, we bring the cosmos back home.

After months of exploring distant stars, nebulae, and black holes, March begins with a tour of our own neighborhood: Mercury, Venus, Earth, and Mars, four rocky worlds born from the same protoplanetary disk 4.5 billion years ago, yet shaped into radically different outcomes.

We’ll visit Mercury, the tiny planet that helped confirm Einstein’s General Relativity and inspired the hunt for a phantom world called Vulcan. We’ll step into Venus, Earth’s “twin” turned runaway greenhouse furnace, and then we’ll zoom out on Earth itself as if we’re alien astronomers reading its oceans, oxygen, and technosignatures from afar. Finally, we’ll head to Mars, a planet that once hosted flowing water, may have been habitable long ago, and still tempts us with the unresolved question of past life.

After the break, I nerd out about my electric car and trace an unexpected history of EVs in space, from the lunar rovers parked on the Moon to a Tesla Roadster orbiting the Sun.

In the sky report, the week’s headline event is a total lunar eclipse: the Full Worm Moon turns coppery red in Earth’s shadow, the only total lunar eclipse of 2026 visible across much of North America. Plus: Jupiter shines in the evening sky, and Mercury and Venus linger low in twilight.

Connect with us on Bluesky @startrails.bsky.social

If you're enjoying the show, consider sharing it with a friend! Want to help? Buy us a coffee! Also, check out music made for Star Trails on our Bandcamp page!

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In this episode, we wrap up our month-long series on stars by exploring their final acts.

Most stars don’t explode. They grow old. We’ll follow the Sun’s future as it swells into a red giant, sheds its outer layers, and becomes a dense white dwarf held up not by heat, but by quantum mechanics itself. Along the way, we’ll examine planetary nebulae like the Ring Nebula and the Dumbbell Nebula, and look at real red giants such as Betelgeuse and Aldebaran that foreshadow stellar endings.

Then we turn to the massive stars — the ones that collapse, detonate as supernovae, leave behind neutron stars and magnetars, or cross the final threshold into black holes. We’ll discuss how gravity overwhelms every known force, how black holes are categorized by size, and why even these seemingly eternal objects slowly evaporate over unimaginable timescales.

In the night sky report, we cover the waxing Moon, a six-planet evening “parade,” Jupiter shining high after sunset, and a beautiful lunar encounter with the Pleiades.

Connect with us on Bluesky @startrails.bsky.social or YouTube @TheStarTrailsPodcast.

If you’re enjoying the show, consider sharing it with a friend! Want to help? Buy us a coffee! Also, check out music made for Star Trails on our Bandcamp page!

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This week we take a nerdy detour into the lives of stars by building a tiny simulated galaxy in Python. We form half a million stars, roll the clock forward 10 billion years, and discover something counterintuitive: nearly all of them are still shining. The stars that dominate our constellations, the bright, showy ones, are statistically the least likely to survive. The night sky, it turns out, is a biased sample.

From there, we leave the realm of statistics and tour a handful of “highlight reel” stars: neighbors like Proxima Centauri and Barnard’s Star, navigational royalty like Canopus, famous oddballs like Vega, and cosmic heavyweights like Antares and WR 104, the so-called “Death Star” that’s (probably) not aimed at us after all.

This week's night sky lands in the sweet spot of the month: A New Moon on February 17 brings genuinely dark evenings, followed by a delicate crescent return. Watch the young Moon pass Saturn on February 19, with Mercury about five degrees south.

Finally, in our book club, we continue with Nightwatch by Terence Dickinson, covering Chapters 4 and 5. We talk old-school printed star charts, seasonal sky “guideposts,” why the Milky Way is a river of unresolved starlight, and Dickinson’s legendary warning about “Christmas trash scopes.”

Connect with us on Bluesky @startrails.bsky.social or YouTube @TheStarTrailsPodcast.

If you’re enjoying the show, consider sharing it with a friend! Want to help? Buy us a coffee! Also, check out music made for Star Trails on our Bandcamp page!

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Stars are easy to take for granted. They rise, they set, and they seem unchanged from one night to the next. But in this episode of Star Trails, we shift our focus to what stars are actually doing right now, shaping nebulae, building solar systems, regulating star formation, and quietly organizing the structure of galaxies around them.

We explore stellar nurseries like the Orion and Eagle Nebulae, where young stars actively sculpt their birth clouds, and look at star clusters, both open and globular, as living communities that reveal how mass determines a star’s fate. Along the way, we unpack one of the strangest facts in astronomy: that the smallest, coolest stars may live for trillions of years, far longer than the universe has existed so far, and how we know that’s true.

Later in the show, we step outside and survey the night sky for February 8–14, demystifying the so-called “planetary parade” by using it as a guide to the ecliptic — the shared path planets follow across the sky.

Connect with us on Bluesky @startrails.bsky.social or YouTube @TheStarTrailsPodcast.

If you’re enjoying the show, consider sharing it with a friend! Want to help? Buy us a coffee! Also, check out music made for Star Trails on our Bandcamp page!

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This week, we begin a month-long exploration of the most familiar objects in the night sky, and wonder why they’re still so often misunderstood.

In this episode, we take a deep dive into what a star really is, and just as importantly, what it isn’t. We’ll talk about how stars form, why they live such turbulent lives, how light escapes their interiors over immense spans of time, and why the stars we see from Earth are not representative of the galaxy as a whole.

Along the way, we’ll challenge common assumptions about color, brightness, and magnitude, explore the strange world of brown dwarves and “failed” stars, and reflect on why nearly everything around us exists because earlier generations of stars lived and died long before the Sun was born.

After the break, we turn our attention to the night sky for February 1st through the 7th. The week opens under the light of the full Snow Moon. We’ll talk about a close lunar encounter with Regulus in Leo, and a selection of star clusters and overlooked regions that still shine through imperfect conditions, including the Beehive Cluster, M67, Monoceros, and a charming little cluster in Orion known as “the 37.”

We also kick off the Star Trails book club with the first three chapters of NightWatch by Terence Dickinson. We’ll discuss why this classic guide remains so valuable, how different editions compare, and why books are still some of the best companions you can bring to the night sky.

Connect with us on Bluesky @startrails.bsky.social or YouTube @TheStarTrailsPodcast.

If you’re enjoying the show, consider sharing it with a friend! Want to help? Buy us a coffee! Also, check out music made for Star Trails on our Bandcamp page!

Podcasting is better with RSS.com! If you’re planning to start your own podcast, use our RSS.com affiliate link for a discount, and to help support Star Trails.