02:16 <B787_300> welp i just watched a hour long video on the GMT... UmbralRaptop save me

02:18 <UmbralRaptop> B787_300: with the ELT or TMT?

02:18 <B787_300> why not with the JWST

02:19 <B787_300> or the EELT

02:20 <UmbralRaptop> As far as telescopes I'm most excited about: LSST. Even if it's only 8 m class.

02:20 <B787_300> sorry not the EELT or ELT... but the OWT

02:20 <B787_300> s/OWT/OLT

02:20 <Qboid> B787_300 meant to say: sorry not the EELT or ELT... but the OLT

02:20 <UmbralRaptop> s/OLT/OWL/

02:20 <B787_300> Which one one OWL

02:21 <B787_300> https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&ved=2ahUKEwiT15_5rtfcAhUl0YMKHQvVB28QjRx6BAgBEAU&url=https%3A%2F%2Fwww.llnl.gov%2Fnews%2Flarge-synoptic-survey-telescope-deemed-top-priority-ground-based-astronomical-facility&psig=AOvVaw2H-CIDWWaLiDJhdwEvQKDD&ust=1533608484990758 good lord... what is the central obsuration like 60%

02:21 <UmbralRaptop> OWL?

02:21 <Qboid> UmbralRaptop: [OWL] => Overwhelmingly Large Telescope

02:22 <B787_300> oh i thought that scope was the OLT

02:22 <UmbralRaptop> B787_300: something like that, but it has all the étendu.

02:24 <B787_300> https://www.lsst.org/sites/default/files/photogallery/FPA-full.jpg that spot diagram is horrid off axis

02:25 <B787_300> also that optical path is so very very weird

02:25 <B787_300> how much is LSST supposed to cost?

02:28 <UmbralRaptop> unsure, but it's being funded by the Sloan foundation, and is like 60% complete.

02:30 <B787_300> also i wonder how well that design could be scaled down

02:34 <UmbralRaptop> I suspect so, though would it offer advantages over eg: a Schmidt camera?

02:37 <B787_300> i could see using it in a large array for transit/GRB afterglow stuff

02:38 <B787_300> as noticing a transit is more luck unless you are always staring at the same region of sky and using super large telescopes for that seems wasteful

02:54 <UmbralRaptop> Hm. Probably room in the northern hemisphere for something like that, as long as it's at least 1 m or so?

02:56 <UmbralRaptop> Alternatively, look for gaps in TESS (ecliptic?)

03:02 <UmbralRaptop> aaaaaa https://twitter.com/FioraAeterna/status/1026259136969756672

03:02 <kmath> <FioraAeterna> hell is being in a room full of people who know each other but not you

03:03 <UmbralRaptop> Bonus points if the room is so loud that it's a struggle to hear anyone, but they are still somehow able to converse.

03:08 <bofh> I'm unconvinced actual conversation happens in those circumstances, as opposed to like, various interference fronts of noise waveforms and everyone pretends they understood at least something :P

03:17 <UmbralRaptop> That would explain some things.

03:34 <B787_300> bofh it also doesnt help my hearing has been slightly degraded by rocket launches

12:32 <egg|work|egg> !wpn whitequark

14:12 <UmbralRaptop> https://twitter.com/adrianprw/status/1026463784729276418

14:12 <kmath> <adrianprw> "How's your hack going?" ⏎ #astrohackweek https://t.co/cBnLTzyA61

14:25 <UmbralRaptop> https://twitter.com/jen_gupta/status/1026472529966366720

14:25 <kmath> <jen_gupta> My last google search was "is play doh flammable?" in case anyone wanted an insight into what the day-to-day life o… https://t.co/ZiEFg0xZnu

15:34 <bofh> UmbralRaptop: depends on what oxidizier is involved

15:38 <egg|work|egg> !meow bofh

15:47 <UmbralRaptop> probably just air.

16:03 <egg|work|egg> UmbralRaptop: not interhalogens?

16:04 <UmbralRaptop> The goal is to ignite student curiosity, not student bodies.

16:22 <egg|work|egg> https://twitter.com/eggleroy/status/1026493357076434945

16:22 <kmath> <eggleroy> @ManishEarth vim, vi, venci

18:40 <UmbralRaptop> https://twitter.com/janinekrippner/status/1026475712600059904

18:40 <kmath> <✔janinekrippner> Omg wow! ⏎ Gorgeous photos of Krakatau volcano erupting on 5 August by @OysteinLAnderse. ⏎ In the night images you ca… https://t.co/aJAPFMrgwx

18:58 <APlayer> Ellied: A diode always has a fixed voltage drop across its leads (provided enough voltage is applied, anyway) - right?

19:00 <APlayer> For blue LEDs, the voltage drop should be around 1.8 V, or so I've heard. Now, I have this LED cube powered by a 5 V Arduino. It's 3x3x3 LEDs arranged in a matrix, so you have up to three LEDs in series. But 3x1.8 = 5.4 - which means that 3 LEDs have a collectively higher voltage drop than the supply voltage can provide. Yet, I can light up all three LEDs at once, and it works. How/why?

19:02 <awang_> "Only for Prime members"

19:02 <awang_> When did this nonsense become a thing

19:05 <APlayer> Because PURCHASE PREMIUM MEMBERSHIP for just this TINY MONTHLY FEE! Buy it now while we STILL HAVE AVAILABLE SPOTS!!!

19:43 <UmbralRaptop> I guess that means you can't buy carbon fiber and epoxy on Amazon.

19:44 <e_14159> Now! Carbon Nanotubes! (Only for Prime members)

19:45 <UmbralRaptop> But if you're a prime member, what are you doing with composites?

19:56 <awang_> Hasn't Prime been getting more and more expensive over time?

19:56 <awang_> And it's way overkill, unfortunately :(

19:56 <awang_> Also, TIL: ages ago Microsoft invented a three-state bool with five states, only two of which are supported

19:56 <awang_> https://docs.microsoft.com/en-us/previous-versions/office/developer/office-2007/aa432714(v=office.12)

20:06 <UmbralRaptop> o_O