hey astroguy just thought i would say i listened to your 'hollow earth' podcast, and have to say i really enjoyed it. Don't know if you've already answered this but how did you get into podcasting? I can guess coast to coast and your educational background played a big factor. I think a lot of people would like to do podcasts, etc but a lot of them don't bother to make them - at least with a decent amount of effort. So props to you for that.
Thanks! Glad you liked it. It's typical of what I see this podcast being -- having clips of crazies make their claims and then explain why they're wrong. It's fun

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I actually wrote this up on another forum a few weeks ago, so here 'tis:
I recorded my first episode in February 2008, and my second one the same month. I asked for feedback from my parents. My dad never responded, and my mom gave a polite, "You realize that radio hosts have teams of people writing for them" response. So I didn't pursue it. I revived the idea this past summer where (another guy on that board) really was some of the inspiration. Well, not for doing the podcast in the first place, but for getting me over the hump. I liked his attitude in his second podcast that he didn't care how many people listened to it, he just liked doing it.
While I've adopted that attitude and released my first episode on August 1, 2011 (after re-recording), I secretly of course hope that more people listen to it. I think that's just something we want -- we put time and energy into this and we hope to get recognition and appreciation and acceptance from our peers.
I got that a bit with my fourth episode, a "bonus" one, on Comet Elenin. I had been getting around 100-200 downloads/episode after a week or two of it being out. Then the owner of 2012hoax.org - who has used my blog a lot in the past as source material for his site - posted about my Elenin episode in the forum on that site and to the twitter feed. Frasier Cain, publisher of Universe Today which ranks around 13,000-14,000 in popularity of websites IN THE WORLD, posted about my episode. I went up to 5000+ downloads in a week and a request that it be re-broadcast on a radio show. I didn't actually gain 5000 subscribers; I'd estimate my subscribers somewhere around 500 now based upon the number of downloads per episode after about a week of it being out.
I'm still trying to figure out how to publicize it more, and I think once I get up to about a dozen episodes out, I'm going to start to contact other people in the astronomy/skeptical/education community and invite them for an interview. That'll get them free publicity (not that they need it) and get me free publicity when they tell their followers they were on it. I plan on contacting Phil Plait (who knows me well), Pamela Gay (who I work with on another project), as well as Bob Novella since he's the most astronomy-interested SGU person. We'll see if my evil plan works.*
I really like listener feedback, and I also wish more people would write reviews on iTunes or just send me e-mails. I actually have responded to EVERY e-mail written so far, and there were about a dozen that came in the few days after Frasier posted. The main request I've gotten is to do longer episodes (my length now is around 20-30 minutes). My initial promise was 10-20 minutes twice a month. I'd rather under-promise and over-deliver right now rather than the opposite, and I'm over-delivering these days by releasing "bonus" episodes as extras each month now.
In terms of topics, my idea is kinda like Skeptoid but for astronomy. Targeted, single issues to explore in-depth. I have NO shortage of topics, though I still encourage people to send in requests, and I'll add them to the schedule. Right now, I'm planned out through March 2012 with numerous ideas for more that are just not scheduled yet.
*I've followed up on this since I wrote that explanation and I have two guys planned for this month (November), a Mayan expert for December for my "Intro to 2012" month, and both Phil Plait and Pamela Gay have agreed to come on for an interview/discussion at some point in the next few month (Pamela probably in late January after we co-launch a project).