I am Phil Plait, astronomer/author/blogger/some time TV host. AMA.
Hey there, fellow redditors. I figured it was about time I did this. I've been here for over four years, after all.
Oh yeah: I'm me.
So I'm ready to answer questions. Please be aware that a lot of astronomy-type queries can take forever to answer, so try to avoid things like "Explain quantum chromodynamics to me" (which is easy anyway, since all I can do is spell it).
BTW, today is a bit crazy with the asteroid mining and the Hubble birthday and of course the glavin, so please bear with me if it takes a while for me to answer stuff. I'm trying. I also asked Woody Harrelson to fill in if needed.
[UPDATE 1 (17:20 UTC): I need to take off for a while and listen to the asteroid mining press conference. I'll be back in hopefully an hour or so, but I'll have to take off again after that. I'll do what I can to keep up! Thanks!]
[UPDATE 2 (21:00 UTC): OK, I was back, but now I need to go run some errands. Back in an hour!]
[UPDATE 3 (02:00 UTC): Wow, the amount of tired I am is a lot. I may quit for the night, or get to a few more, but I may have to just start up again in the morning. You guys are curious! I love curious!]
[UPDATE the last (4/25 at 18:00 UTC): Folks, I love you all (especially you ) but I think I have to call it quits now. I'm not sure how many questions I've answered, but it's a couple of hundred I think, and I need to, y'know, write my blog and stuff. This was a LOT of fun, and the support you've given me is amazing. Like I said above, I've been here for 4+ years, and I don't see any reason to stop now. I get a lot out of reddit, and really appreciate what you've given me. Thanks.]