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00:03
@called2voyage ok, thanks. i'll change it.
kim holder has removed an event from this room's schedule.
kim holder has added an event to this room's schedule.
@KingsInnerSoul Just to let you know, there was an error in the launch time - it is an hour later, i had to redo the event listing. So, unless you register again, you won't get the reminder. :P
00:39
Thanks.
Where can we watch the launch?
it says its offline
TRied the colour blind glasses from Enchroma today.
Kind of interesting. They had this colour ball, looks kind of like this:
And with the glasses on, I at least one band I could see was two different colours, but without the glasses, I saw one band.
01:27
@geoffc gee, i wonder how that works
still no feed on the spaceflight101 link
@KingsInnerSoul that should be because they start the feed shortly before the event
the launch is actually scheduled for just after 2 a.m. UTC. I put the time a bit early, because normally they start broadcasting beforehand, so you see the whole countdown process
here is the feed directly from the Roscosmos channel on YouTube as well:
@kimholder So the argument is that my receptors are off in frequency they detect. The lenses shift the frequency of the incoming light so that it is more seperate in known regions of trouble so I can percieve distinctions. It is interesting.
02:01
well, according to officialness, the Soyuz should have now launched, but i have no feed
@geoffc that makes sense. so, it shifts all the light a little?
@kimholder Or shifts SOME light, strategically. But basically, yes.
Try the color blind test, I do TERRIBLE on it. :)
yeah, i wondered if they could just shift some
so, nobody else is getting something from that youtube feed? it isn't a geographic thing?
ah, okay. Launch delayed for one day.
SF101 tweeted it...
ima gonna have to do that twitter thing at some point
Rescheduled for tomorrow.
Meh I still cannot see the point of Twitter. A very rare interesting tweet, but then 10,000 useless ones. All chaff, almost no wheat.
02:17
yep, did the test and have normal vision. some were hard though. and they didn't give a score. i did work, i want a score :(
"Late countdown abort, media report vehicle & pad safing underway."
updating schedule
Huh. I got a surprisingly simple question, yet I can't answer it.
Jupiter has a very low density, yet a high mass. Why doesn't its own gravity make it compress in on itself?
it's mostly liquid hydrogen. takes a lot of pressure to make H liquid at that temperature. It can't get much more dense.
Can it not become a solid?
i believe it does near the core, according to the modelling
02:30
The core is even more complicated. It's supported by something called "electron degeneracy pressure".
Nevertheless, something as massive as a star can collapse, yet a gas giant can't?
You'd think pressure in a star would prevent the collapse
i take it back about solid H in the core - that was pure hearsay i can't back up
@SirCumference It does, until the pressure weakens. :P
@duzzy "Pressure weakens"?
It starts to relax a bit.
02:33
When it takes more energy to fuse the elements than it gets from the reaction.
the pressure is acting in all directions - it compresses the core as well as counteracts gravity nearer the surface
Well yeah, then it contracts and then becomes a lot larger
Hence, a red giant
Okay, now I'm really confused
Why?
I think you're answering your own questions.
Outward pressure and inward pressure are having a fight, and when it's not longer balanced, things go boom.
It's like a snake and a mongoose. Regular geese are mean, but mongeese kill snakes.
Well yep, in certain situations
see, you can count on duzzy to explain things in a way anyone can understand...
02:37
I think I need to study less and sleep more.
exams coming up?
So wait. A gas giant has a low density and high mass, and yet it won't compress because...?
Exam on Thursday!
@SirCumference a light element is still not so dense no matter how much you compress it
If I ever lose the ability to hear high pitched sounds, I'll be quite sad.
02:39
jupiter is largely metallic hydrogen and helium. It doesn't have the energy to fuse them into new elements, so there is a threshold
@duzzy i'm not entirely sure you are lucid
what's the exam on?
Networking.
oh, you mean like on LinkedIn? :D that's easy
:P
are you going to explain what high-pitched sound you are going to miss?
are you not quite sure if the fire alarm has gone off?
Ah, I figured it out. Increasing a gas giant's density would lead to higher temperature, which would make the giant expand, which would cool it down.
This is all in equilibrium
02:47
oh hey, there you go
No fire alarms.
but at some astronomically high pressure/temperature, fusion starts, which is then self-sustaining
right?
Yeah, if you increase the mass enough
I'm just really tired, and I'm listening to music... and I love the parts where the sound goes high. I don't know anything about music, except I like to hear it.
some high-pitched guitar solos now irritate me
i can still hear it, but it's uncomfortable
02:50
It's my favorite part
it would be rather distressing to have trouble listening to my favorite music.
Layla. There is a great song with a lot of really high-pitched guitar.
i have a feeling i'd have to play it quietly now in order to avoid finding it physically uncomfortable.
Layla! You've got me on my knees, Layla!
and i have a permanent strong association of the beautiful solo with a scene from Wiseguys where Scorcese used it
I haven't seen it.
Pianos are amazing, though.
03:05
i don't know of any other song that uses that very unique combination
electric guitar and piano
I want piano music now.
I've never heard that before. I really liked the piano, but the singing overpowered it. :(
:)
When I finish this degree, I'm taking piano lessons.
We'll see if someone can teach an old person who has zero music experience how to play a piano.
03:37
@duzzy OSI Stack 7 layers are? And TCP's 4 layer version of that are? How does DLC differ from Appletalk?
What layer does Ethernet vs Arcnet operate at?
04:27
I'm more concerned about traffic shaping, load balancing, and security stuff.
05:26
 
8 hours later…
13:38
@duzzy i prefer the piano to the singing too, but hey, the singing isn't bad. very sad song though. The mood of that Killswitch track isn't really my thing. a bit too relaxed or something. Or maybe it's just that echoing in the piano doesn't work for me.
 
2 hours later…
15:26
Matt Sherman on April 27, 2016
Running a productive meeting is the FizzBuzz of management.
16:06
So, can i kvetch a bit? i can't resist. Turns out i'm also on the ISDC schedule as presenting "Agencia Espacial Mexicana Mission to Lunar Surface" Which is news to me. Completely.
@kimholder oh boy
this all stems from me calling the AEM on behalf of the conference, opening a dialogue which was never followed up on by people in the NSS who could actually get a Mexican delegation out there.
i mean, i'm just a regular member. and they said they have no travel budget. and they asked for some goodwill gestures that nobody followed up on, and i gave up.
and yet there i am, first thing in the morning, half an hour set aside.
that has to go. there is no way i ever implied i'd do that. i just made a phone call.
(and i could say a bunch of other stuff about NSS administration... but i won't...)
(by the way, i was asked to make that phone call.)
16:22
Maybe if you had a few extra k$ right? ;)
I tend to think the Agency is right - they have no reason to send someone to this conference. There would be little benefit to them. Apparently the one thing we all agree on in this is that none of us is willing to pay for it.
 
1 hour later…
17:35
No surprise at all, Red Dragon is a real thing.
2018, however, is soon...
18:03
If SpaceX pulls this off, they will set a HUGE precidence... The second ever privately controlled spacecraft not in Earth orbit, and the second to orbit something besides Earth...
With the weight being at least 6 times heavier than Curiosity, including the Dragon itself...
it sort of feels to me like a test mission. Everything on the mission is experimental.
i've heard it said that there is little chance retropropulsion landing would work on the first try
and the timeline certainly doesn't allow for much testing
That would be the SpaceX way.
I can't imagine that they wouldn't include some kind of a payload...
the article Jerard linked to mentions a NASA science payload of instruments. But i can't see them spending big bucks on it.
Maybe a good seismometer package, or something like that. But 2 tons of payload...
Maybe the Mars Society would do some kind of an experiment, or something.
what i can't understand is why they wouldn't announce a series of test retropropulsion reentries here on earth.
18:10
I expected Red Dragon, but not for another 2-4 years...
Well, they will be doing those, in 2017. It's a part of flight qualifying the spacecraft to go to the ISS.
so they are working on the assumption that in that process they will iron out the details and be ready for mars?
Mars Society could launch a payload that would convert Martian Atmosphere in to Methane, on Mars...
that would be cool
A Mars launch window won't wait. If they are announcing this, I suspect they must be fairly sure...
No one that I know of was expecting this so soon...
how can they be? it's never been done.
i'm picturing Mark Adler's parachutes instantly shredding...
18:13
Robert Zubrin has done all of the chemistry tests in Martian test environments on Earth. He could come up with a 1 ton payload that would be a proof of concept on Mars, that would easily fund it...
As for parachutes, I don't think there is any plan to use them. There must be some kind of a retro-stage that fires before...
Dragon V2 has about 1600 m/s delta v. I doubt that is enough to stop that heavy of a payload on Mars without something else...
just sayin', those parachutes were meant to be NASA's answer to the same problem, they did a ton of work on them, did two versions, and when tested, they where obliterated in like a second.
and yet SpaceX thinks they can do a few tests in Earth atmosphere and be confident their Dragon will successfully land?
Okay, so there's at least 2 more questions.
my guess is they're more smiling for the cameras. They have to test, whaddyagonnado
1. How much Delta V does Dragon actually have.
2. How fast does a spacecraft on a near-Holmann transfer orbit approach Mars.
3. How much will a Dragon slow down by the atmosphere, without a parachute?
I'm sure a camera will be part of any payload, those are relatively cheap and easy.
i think some of that is answered in questions in the current collection...
18:18
Seismometer would also make a ton of sense, it would double as additional instrumentation.
But then you still have 1.95 tons of payload...
I'm sure someone would love to have a basically free ride to Mars...
what about something in orbit to monitor the EDL? So they can be sure of actually getting the data.
i'm sure there are lots of handy things SpaceX could do with their own Martian satellite.
That's an interesting question I suppose...
Maybe NASA will let them borrow a Martian satellite, at least for EDL.
I'm sure HiRISE will photograph the capsule, it's good PR, if nothing else.
tit for tat.
maybe they'll use up the payload then making super-impact-proof instrumentation that will keep sending data even if it crashes real hard.
Maybe they will launch payload that people wouldn't mind too much if it crashed into Mars. I'd love to send my autograph there, even if it crashed...
you are, then, more romantic than me.
18:29
LOL.
There is finally something in orbit that I touched with my bare hands.
It's taken long enough, but...
well, then, if you want your autograph on mars too, then you are just greedy. :D
What if payload includes proof of concept building tech?
0
A: What payload is expected on the 2018 Mars Dragon flight ("Red Dragon")

choegerThe article you linked makes it pretty clear that the goal is to test powered landing of Dragon spacecraft. Hence, I expect little to no payload at all. Of course there might be some token experiment, but it really does not need to be. What I do expect is some magnificent PR coverage of the whol...

i'm really surprised that anybody gives this more than maybe a 10% chance of success...
Like test versions of what he plans to construct his village with
18:35
just seems too soon for something like that to me. Getting actual methane production is a step on that road, and seems more practical.
I'll give it a 10% chance of success, IF you include launching in the 2018 window as part of that.
If they manage to launch, I give it a least a 50% chance.
Mars Society has the equipment to do methane production, I'm sure they'd love to send that as a free experiment to Mars.
And if they asked for money to fund that experiment, I'd gladly donate.
really? david livingstone mentioned retropropulsion on a recent show, and said the experts say it is nowhere near ready.
I'm going to a Mars conference in about 3 weeks to talk to some boy scouts, I wonder if this will come up...
i should look for the show he was referring to and listen to it...
The experts also said landing a spent booster was impossible...
18:38
well, that took a few tries. that's the point.
So, it seems that the Martian atmosphere can slow a spacecraft down to about 250 m/s without a parachute. Given that, retropropulsion should work...
^ ok, that's a recent show with a JPL expert on the exact thing. i'm putting it on...
Wow, are they going to crash rockets into Mars now, instead of that poor barge? But how are they going to paint the "X"?
The last part of your question is the REAL question.
How will they know where to land without the SpaceX X...
@Hohmannfan curiosity
;)
18:42
SpaceX without an X is just space
@called2voyage XP
@called2voyage Good idea!
Maybe that will be the payload, a means of painting the X for the next lander?
Lol, or they'll have a capsule that will burst on impact in the shape of an X
3
That would be interesting...
18:46
Like a sack of floor with four holes.
If it happens to land successfully, then they'll have a remote detonator
BLAM spacex was here!
The same stunt as those Aliens♥ did on Pluto.
18:59
Sarah Bailey suggested microbes and suddenly all I can think of is war of the worlds
That's really unlikely...
@PearsonArtPhoto I know
Although maybe Elon will finally do his mouse experiment that caused him ultimately to start SpaceX...
Planetary contamination with life: A good thing if done on a planet we are sure is lifeless. Otherwise, a really bad thing.
 
4 hours later…
23:20
If life was found on Titan, would it be called Titanian?
Would the liquid methane be very... "watery" or would it be more like syrup?

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