Latest / Star Trails: From Backyard Astronomy to Cosmic Wonder / One Year of Star Trails: A Journey Through the Cosmos and Time

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One Year of Star Trails: A Journey Through the Cosmos and Time · Star Trails: From Backyard Astronomy to Cosmic Wonder

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Howdy Star Gazers and welcome to this episode of Star Trails.
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I'm Drew and I'll be your guide to the night sky for the week starting February 2nd through
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the 8th.
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This week is special as it marks the one year anniversary of the Star Trails podcast.
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Later in the show I'll talk about why I started the show and what the future may hold.
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Plus we'll explore Carl Sagan's concept of a cosmic calendar.
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We're going to compress the entire timeline of the universe into a span of a year to give
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us a framework for understanding the vast scale of the universe.
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We'll start with what you can see from your backyard this week so grab a comfortable spot
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under the night sky and let's get started.
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This week the moon will be in a waxing phase, gradually increasing in brightness each night.
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On February 2nd and 3rd the waxing crescent moon will be visible in the early evening,
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setting a few hours after the sun.
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This is a great time to observe the moon's delicate crescent shape as well as the earth
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shine effect where sunlight reflects off earth and faintly illuminates the darkened portion
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of the lunar surface.
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On February 5th the moon will reach its first quarter phase, appearing as a perfect half-illuminated
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disc in the evening sky.
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This phase offers excellent contrast along the terminator, the dividing line between
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light and shadow, where craters and mountain ranges stand out sharply.
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By the end of the week the moon's waxing gibbous phase will dominate the night sky.
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It will be bright and high in the sky for most of the night, making deep sky observations
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more challenging but providing clearer views of the moon's craters and maria through a
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telescope.
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Venus remains a dazzling beacon in the western sky after sunset.
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As one of the brightest objects in the sky it's impossible to miss, shining like a bright
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diamond just above the horizon.
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Mars is still making its way through Gemini.
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It reached opposition a few weeks back so it's still big and bright in the sky.
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A telescope may reveal surface details and polar ice caps under good conditions.
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Jupiter dominates the sky from up high.
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It's nearly directly overhead after dusk and visible until about 2am.
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Even a modest telescope will reveal its cloud bands and its four largest moons, which change
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position from night to night.
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Saturn is also visible though lower in the western sky after sunset.
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The ringed planet is slowly sinking toward the horizon so this will be one of the last
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good months to observe it before it disappears from view for a while.
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Through a telescope Saturn's rings and its largest moon, Titan, make for a stunning sight.
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There are also a few interesting alignments to watch for this week.
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On February 5th, the first quarter moon will appear close to Jupiter and Aldebaran, the
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bright orange star marking the eye of Taurus.
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The moon will also pass near the Pleiades star cluster, offering a beautiful celestial
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grouping visible to the naked eye or through binoculars.
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On February 6th, the moon will form a striking line with Jupiter and Aldebaran.
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Look high in the sky to observe both events.
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This week we turn our attention to two constellations, Auriga, the charioteer, and the lynx, an often
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overlooked but rewarding constellation for deep sky observers.
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First let's start with Auriga, which is almost directly overhead and easy to spot thanks
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to its brightest star, Capella.
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Auriga is the sixth brightest star in the night sky and has a beautiful golden hue.
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But beyond this prominent beacon, Auriga is home to a trio of remarkable open star clusters
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that make for excellent binocular and telescope targets.
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M36 is sometimes called a miniature version of the Pleiades.
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This young cluster contains hot blue-white stars that sparkle against the blackness of
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space.
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M37 is the richest and brightest of Auriga's open clusters.
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It stands out with its densely packed core and a single reddish giant star near its center,
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adding a splash of color to the grouping.
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Finally, M38 has an intriguing X or starfish shape when viewed through a telescope, making
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it a rewarding target for deep sky observers.
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Now for something a little more challenging, we turn to lynx, a faint constellation that
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stretches between Auriga and Ursa Major.
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While it doesn't have any particularly bright stars, it holds one of the most intriguing
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deep sky objects in the sky, NGC 2419, also known as the intergalactic wanderer.
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This globular cluster is incredibly distant, about 300,000 light-years away, making it one
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of the most remote star clusters associated with the Milky Way.
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Unlike most globular clusters, which orbit relatively close to the galactic center, this
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one takes such a long time to complete its orbit that some astronomers originally believed
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it might not belong to the Milky Way at all.
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Through a medium to large telescope, it appears as a faint, compact sphere of stars.
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As always, try to observe from a dark sky location for the best views and let your eyes
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adjust for at least 15 minutes to catch the faintest details these celestial wonders have
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to offer.
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I'd like to take a moment to thank the listeners of Star Trails, because this week marks the
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one-year anniversary of the podcast.
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I'm not sure how time flew by that quickly.
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It's sort of like orbiting a black hole and returning to Earth to find years have passed
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in the blink of an eye.
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But here we are, entering the show's second year.
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When I began this endeavor, I decided that I would produce it for a year and at the end
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of that period, see how things were going.
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If there was growth, I'd continue on.
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Strangely, we've picked up listeners from across the globe and growth has been slow
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but steady.
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I'm about halfway to a milestone goal of 1,000 listeners per month, so I plan to keep
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plugging away in hopes of reaching that benchmark one day.
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I'd like to take a moment to discuss the show's experimental origins, because the early weeks
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of the show were a little, well, strange.
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I'd also like to highlight a few of the things I think the show did well over the last year,
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which was just an incredible year for amateur astronomers from a surprise solar storm and
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auroras, a dramatic solar eclipse, to a crazy comet.
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Next to these events, we had no shortage of good content over the last year.
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Star Trails was born in January 2024, one evening while I was out on one of my daily
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walks.
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I simply looked up at the field of stars above and wondered what was visible that night.
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That triggered a memory from decades earlier, when I would stay up late on Saturday nights
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to catch Jack Horkheimer's Star Hustler segment on PBS.
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Maybe some of you remember it.
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Greetings, Greetings, fellow stargazers, and although I don't want to date myself, I wonder
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how many of you out there remember along with me.
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As a kid growing up in the 80s, there was no internet, no astronomy apps, and no real
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content on TV aimed at aspiring astronomers, except Star Hustler, which was a brief program,
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five minutes or so, that ran at the end of the broadcast day.
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On the show, Jack would preview the night sky for the week ahead, offering up basic
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astronomy topics and news of special events, such as Haley's Comet.
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Star Trails shamelessly copies this format.
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So after the burst of inspiration from my late night walk, I decided that I wanted to
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create an experimental micro podcast about astronomy that was produced automatically
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via a series of shell scripts, programming APIs, large language models, and even AI voice
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generation.
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My goal was to be hands off in the process, and if I was the only person listening, then
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hey, at least I would know what was in the night sky that week.
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As a podcast editor and overall computer geek, I knew this was possible.
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Some folks in the podcast world were already experimenting with workflows to accomplish
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fully automated podcasts.
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However, I ran into issues immediately with this approach.
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Above all, every AI model has issues with accuracy.
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Simply asking chat GPT for next week's moon phases and visible planets almost always produces
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a response that is incorrect.
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No matter how authoritative and confident its response sounds, it's generally wrong.
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Even the new hot AI deep seek fails at this.
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With that being said, with rigorous prompting, you can achieve success, but it would get
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these basic facts wrong so often that I felt compelled to write a Python script to pull
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the correct moon phase and visible planet information.
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By the way, if anyone is interested in this, look into the library called Python Ephemeras,
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which enables you to code up astronomical predictions with relative ease.
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Anyway, I'd hope to then feed the output of my Python program into an AI to write my podcast
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script.
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The results, while now accurate, felt bland and uninspired.
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So I started writing the episodes myself.
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Around this time, AI generated voices were making some waves in the podcast space.
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I'd found some voices that sounded remarkable, and I made the decision to use the AI voice
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service 11 Labs to read my scripts.
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Early tests shared with friends seemed successful, and no one seemingly realized they were listening
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to a computer generated voice.
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I produced a handful of episodes using this voice, so if you go back and listen to the
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earliest episodes, you'll hear a very different sounding drew.
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Welcome to another episode of Star Trails.
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I'm your host, Drew, and together we'll embark on a celestial journey through the night sky
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for the week, starting February 4th, 2024.
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Initially, I wanted to use a generated voice simply for practical reasons.
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One, speed of production, and two, audio quality.
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I've never been happy with the sound of my home studio, and I'm not a fan of my own
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voice either.
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Using a service that can read a script and not make mistakes would certainly boost productivity.
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Plus, with some programming, I could get closer to the dream of automating aspects of the
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show's production.
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Again, my plans went awry.
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The AI voice struggled with certain pronunciations, particularly star names.
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I can't recall how many times I had to experiment just to get the AI to say playities, Virgo,
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or Aldebaran properly.
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So this was neither convenient nor fast.
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Plus, I thought about my own podcast listening habits and realized that I personally wouldn't
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want to listen to a podcast that was narrated by a machine.
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So I decided to narrate the show myself.
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Just recording in a walk-in closet at home, and since late last year, I've been recording
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in a podcast studio downtown, which is a free service provided by our library.
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Initial episodes were very short, as I only intended this to be a five-minute experience,
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like the original Star Hustler series.
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The problem I ran into was repetition.
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The same planets, constellations, deep sky objects, and so on would be mentioned repeatedly
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from week to week, so there needed to be additional information to keep the show fresh.
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I decided to add on a more general segment that deals with Astronomy 101 topics and other
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subjects of interest.
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In many cases, I think these segments are more interesting and informative than the
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weekly Sky report.
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So my experiment to create an automatic podcast about the night sky essentially failed before
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liftoff, but that's not a bad thing because I think we've landed in a good place, and
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that's a handcrafted show built around a passion for a hobby, not soulless algorithmic output.
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Plus an AI could never generate my favorite episode from last year.
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That was Episode 41, A Night at a Star Party.
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The idea of an audio essay covering my local club's seasonal star party was something I
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was eager to produce.
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I'd planned to cover the star party in spring of last year, but the event was canceled owing
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to weather conditions.
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I couldn't try again until our fall star party some months later, but in the end, I think
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it was worth the wait and the episode captured the camaraderie of the event in a unique way.
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I also receive good feedback from listeners when I speak about my personal experiences
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and observations.
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I tried to report on some of the amazing auroras last spring that lit up the skies down south.
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Also I went out and tried to photograph a few super moons and I spent a few nights chasing
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Comet C2023A3 Sushinshin Atlas, among others.
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Sometimes it's hard to make time to simply look up, but when the sky is clear, it's
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almost always worth it, and I do enjoy sharing my bumbling efforts with listeners.
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As we go forward into this second year of production, I'm trying to find ways to further
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diversify the content and subject matter.
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I've been considering a move into video for a while, but for now I think we'll remain
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audio only.
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To do video properly would require resources and time beyond my means at the moment, particularly
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in the art and animations that I'd need for each show.
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Visit StarTrails.show and leave a comment if you have any recommendations for how I
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can achieve this, or if this is even something you'd be interested in.
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As we celebrate one year of StarTrails, let's take a moment to zoom out, way out, and look
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at where we fit into the grand story of the cosmos.
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Even condensing the entire 13.8 billion year history of the universe into a single calendar
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year.
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This thought experiment is what Carl Sagan called the cosmic calendar, a way to help
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us grasp the staggering scale of time.
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In this model, the universe begins in a brilliant flash on January the 1st, the Big Bang.
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In an instant, space and time come into existence, expanding at an unimaginable rate.
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The first subatomic particles emerge, and within minutes, simple atoms like hydrogen and helium
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form.
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But for a long time, the universe is a dark, hot soup of particles.
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It isn't until late January that the first stars begin to shine, ending the cosmic dark
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ages.
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These stars burn hot and fast, living and dying in massive explosions that forge heavier
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elements like carbon, oxygen, iron, the building blocks of everything to come.
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As these early stars explode, their remnants gather into swirling collections of gas and
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dust, forming the first galaxies.
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By early March, our Milky Way galaxy is taking shape, a faint, developing spiral in a vast
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and growing cosmic ocean.
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Throughout March, April and May, galaxies are colliding and merging, forming immense clusters
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and superclusters.
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Black holes grow at their centers, shaping the evolution of entire galaxies.
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The chemistry of the universe is becoming richer, with heavier elements seeding future
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planets and, one day, life itself.
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By June, our galaxy is a dynamic place filled with young and ancient stars alike, but our
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sun, it doesn't exist yet.
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Many generations of stars have lived and died, creating the ingredients needed for planets
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like Earth.
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The stage is being set, but our solar system is still billions of years away.
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Then in early August, something remarkable happens.
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Our sun ignites.
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A vast cloud of gas and dust collapses under gravity, forming the familiar fiery sphere
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at the heart of our solar system.
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Around it, a swirling disk of leftover material begins clumping together, forming the first
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rough outlines of planets.
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By mid August, these young planetary bodies are colliding and reshaping themselves, forging
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the rocky worlds and gas giants we know today.
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Earth is still a molten, hostile landscape, bombarded constantly by asteroids and comets.
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Finally, on September the 6th, Earth itself is born.
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At this point, it's a seething volcanic world with no breathable atmosphere, no oceans,
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just a fiery, chaotic planet in the making.
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Over the next few days, the moon forms, likely from a massive collision between Earth and
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a Mars-sized object.
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This impact sets our planet spinning and tilts its axis, giving us the seasons we experience
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today.
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Just more than two weeks later, on September 21st, something extraordinary happens.
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Life appears.
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The first single-celled organisms emerge in the oceans, setting off a slow but profound
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chain of evolution.
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These microscopic life forms will dominate the planet for billions of years, gradually
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transforming Earth's atmosphere by producing oxygen.
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Yet, for all of October and November, life remains simple, just bacteria and other single-celled
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organisms.
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The planet itself undergoes dramatic changes, continents drift, volcanoes erupt, and ice
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ages come and go.
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But for now, there are no plants, no animals, no complex ecosystems, just tiny unseen life
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quietly reshaping the world.
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By mid-December, multicellular life emerges and simple sea creatures begin appearing in
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Earth's oceans.
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Some days later, the first fish evolved, followed by land plants.
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A few more days pass and amphibians crawl onto land.
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Reptiles evolve.
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Dinosaurs appear on December 26 and rule the planet for millions of years.
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Then on December 30, a giant asteroid strikes Earth, wiping out the dinosaurs.
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On the very last day of this theoretical cosmic calendar, human ancestors finally appear in
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the late afternoon.
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As the hours tick down, early humans learn to make tools, harness fire, and form civilizations.
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And then, in just the last 14 seconds before midnight, recorded history begins.
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Every empire, every discovery, every moment of art and science that defines our world
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today.
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Everything we've experienced from the Renaissance to the Space Age all happens in the last
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fraction of a second before the New Year.
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In this vast cosmic timeline, our existence as a species is barely a blink, but that blink
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represents something greater.
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We are the universe becoming aware of itself, gazing at the stars, asking questions, and
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celebrating the wonders of the cosmos.
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At the end of the day, that's what Star Trails is all about.
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If you found this episode useful, let me know and feel free to send in your questions and
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observations.
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The easiest way to do that is by visiting our website, startrails.show.
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This is also a great way to share the show with friends.
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Until next time, keep looking up and exploring the night sky.
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Clear skies, everyone.