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Posted: 2/22/2015 9:09:48 PM EDT
[#1]
Quote HistoryQuoted: Eskimo Nebula. This is the remnants of a star similar to the sun exploding. http://en.wikipedia.org/wiki/Eskimo_Nebula Full res. When they say it was similar to the Sun, how similar do they mean? I thought stars like our Sun don't explode. |
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Posted: 2/22/2015 9:13:41 PM EDT
[#2]
Quote HistoryQuoted:
I'm just going to keep posting. I'm guessing people are reading it but not many have much to contribute. Quote HistoryQuoted:
Quoted:
This thread continues to deliver! Can confirm. I work as an aerospace engineer, but most of the pics I see in my job are just of broken aluminum panels, or broken epoxy bonding on stacked caps. So I can't contribute much. The stuff on this thread is beautiful and truly awe-inspiring. Thanks for posting- |
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Posted: 2/22/2015 9:14:34 PM EDT
[#3]
Great thread, thanks.
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Posted: 2/22/2015 9:15:41 PM EDT
[#4]
Quote HistoryQuoted:  Quote HistoryQuoted: Quoted: I'm guessing people are reading it but not many have much to contribute. Correct. I just subscribed. Please keep going. |
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Posted: 2/22/2015 9:16:44 PM EDT
[#5]
Quote HistoryQuoted: When they say it was similar to the Sun, how similar do they mean? I thought stars like our Sun don't explode. Quote HistoryQuoted: Quoted: Eskimo Nebula. This is the remnants of a star similar to the sun exploding. http://en.wikipedia.org/wiki/Eskimo_Nebula Full res. http://upload.wikimedia.org/wikipedia/commons/1/16/Ngc2392.jpg When they say it was similar to the Sun, how similar do they mean? I thought stars like our Sun don't explode. Pretty similar. Not really an explosion like a supernova. More like the inner core of the star blowing away the outer layers. http://en.wikipedia.org/wiki/Planetary_nebula |
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Posted: 2/22/2015 9:17:02 PM EDT
[#6]
Quote HistoryQuoted: When they say it was similar to the Sun, how similar do they mean? I thought stars like our Sun don't explode. Quote HistoryQuoted: Quoted: Eskimo Nebula. This is the remnants of a star similar to the sun exploding. http://en.wikipedia.org/wiki/Eskimo_Nebula Full res. http://upload.wikimedia.org/wikipedia/commons/1/16/Ngc2392.jpg When they say it was similar to the Sun, how similar do they mean? I thought stars like our Sun don't explode. ETA: Our solar system will turn into a planetary nebula which compared to a supernova is like a hand grenade compared to a nuke. |
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Posted: 2/22/2015 9:28:29 PM EDT
[#7]
I have nothing to add, I'm merely an inquisitive mind passing through.
I just when wanted to say thank you to TescoVee and the others who contributed to this thread. This is (mostly) all so very far beyond my comprehension that I find it fascinating. You guys should know this is one of the only threads I'm currently subscribed to (with AR 7.5, and the lightweight parts thread), and I appreciate the time guys like you put in to these threads. I had thought the mention of the tranny threads life span vs this thread was funny. But for whatever reason, hours later as I'm eating dinner, I felt compelled to say something. So, thanks. 
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Posted: 2/22/2015 9:31:17 PM EDT
[#8]
This is a wonderful thread. I love science. Luckily I'm only 34, and currently trying to read all the History books I can cram in all the while recording what I'm reading for quick reference. Astronomy is something else I would like to dabble in. It's very fascinating.
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Posted: 2/22/2015 9:33:03 PM EDT
[#9]
Quote HistoryQuoted: This is a wonderful thread. I love science. Luckily I'm only 34, and currently trying to read all the History books I can cram in all the while recording what I'm reading for quick reference. Astronomy is something else I would like to dabble in. It's very fascinating. Thanks everyone for the nice comments. |
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Posted: 2/22/2015 9:38:20 PM EDT
[#10]
Neutron stars, exotic stars (both kinds) and what may or may not happen at their cores interest the shit out of me..
Strange matter / quark stars, stranglets and their potential interactions.. |
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Posted: 2/22/2015 9:39:12 PM EDT
[#11]
NASA decided it wanted to collect samples of material from a comets tail to see what it was made of. How did they capture the particles? The worlds most advanced and lightest ballistics gel:
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Posted: 2/22/2015 9:42:38 PM EDT
[#12]
Quote HistoryQuoted: I'm just going to keep posting. I'm guessing people are reading it but not many have much to contribute. Quote HistoryQuoted: Quoted: This thread continues to deliver!  |
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Posted: 2/22/2015 9:43:57 PM EDT
[#13]
Quote HistoryQuoted: Neutron stars, exotic stars (both kinds) and what may or may not happen at their cores interest the shit out of me.. Strange matter / quark stars, stranglets and their potential interactions..  |
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Posted: 2/22/2015 9:44:18 PM EDT
[#14]
Quote HistoryQuoted: I feel like I'm freeloading. Quote HistoryQuoted: Quoted: Quoted: This thread continues to deliver!  |
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Posted: 2/22/2015 9:58:29 PM EDT
[#15]
This makes me laugh way more than it should:
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Posted: 2/22/2015 10:13:10 PM EDT
[#16]
Quote HistoryQuoted:
For History listen to this podcast young padawan: http://www.dancarlin.com/hardcore-history-series/ Thanks everyone for the nice comments. Quote HistoryQuoted:
Quoted:
This is a wonderful thread. I love science. Luckily I'm only 34, and currently trying to read all the History books I can cram in all the while recording what I'm reading for quick reference. Astronomy is something else I would like to dabble in. It's very fascinating. Thanks everyone for the nice comments. lol For history I read the real deal. Polybius and Livy. Plutarch for the social aspects of Greeks differing from the Roman. Dan Carlin's a 3rd hand account. 
Dan Carlins wrath of Kahn was decent. I found some editing errors in his Punic Wars though. He said Publius Cornelius Scipio Africanus was adopted, which is incorrect. Africanus's grandson Publius Cornelius Scipio Aemeilanus was adopted into the family. |
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Posted: 2/22/2015 10:14:16 PM EDT
[#17]
Bored? Know anyone that wants to take a free introductory astronomy class?
Here you go. http://www.planetary.org/multimedia/video/bettsclass/betts-class-2014-archive-page.html |
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Posted: 2/22/2015 10:14:18 PM EDT
[#18]
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Posted: 2/22/2015 10:18:22 PM EDT
[#19]
Quote HistoryQuoted: The dirty Swedes have a scale model of the solar system. It's roughly 1:20,000,000. http://upload.wikimedia.org/wikipedia/commons/b/bd/Mars_model_of_Sweden_solar_system.jpg |
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Posted: 2/22/2015 10:18:55 PM EDT
[#20]
Quote HistoryQuoted:
We should make a bigger and better one in the USA.
Quote HistoryQuoted:
Quoted:
The dirty Swedes have a scale model of the solar system. It's roughly 1:20,000,000. http://upload.wikimedia.org/wikipedia/commons/b/bd/Mars_model_of_Sweden_solar_system.jpg
I can't believe we haven't. |
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Posted: 2/22/2015 10:21:36 PM EDT
[#21]
Quote HistoryQuoted: I can't believe we haven't. Quote HistoryQuoted: Quoted: Quoted: The dirty Swedes have a scale model of the solar system. It's roughly 1:20,000,000. http://upload.wikimedia.org/wikipedia/commons/b/bd/Mars_model_of_Sweden_solar_system.jpg I can't believe we haven't. |
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Posted: 2/22/2015 10:22:04 PM EDT
[#22]
Quote HistoryQuoted: Bored? Know anyone that wants to take a free introductory astronomy class? Here you go. http://www.planetary.org/multimedia/video/bettsclass/betts-class-2014-archive-page.html |
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Posted: 2/22/2015 10:25:56 PM EDT
[#23]
Quote HistoryQuoted: I'm in. Quote HistoryQuoted: Quoted: Quoted: Quoted: The dirty Swedes have a scale model of the solar system. It's roughly 1:20,000,000. http://upload.wikimedia.org/wikipedia/commons/b/bd/Mars_model_of_Sweden_solar_system.jpg I can't believe we haven't. |
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Posted: 2/22/2015 10:29:10 PM EDT
[#24]
Quote HistoryQuoted:
Don't worry, it's not going to happen for four billion years. Life on earth will be extinct in two billion years from solar powered global warming. I hear tardigrades laughing in the background
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Posted: 2/22/2015 10:34:18 PM EDT
[#25]
Quote HistoryQuoted: I hear tardigrades laughing in the background Quote HistoryQuoted: Quoted: Don't worry, it's not going to happen for four billion years. Life on earth will be extinct in two billion years from solar powered global warming. I hear tardigrades laughing in the background  |
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Posted: 2/22/2015 11:07:58 PM EDT
[#26]
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Posted: 2/22/2015 11:26:41 PM EDT
[#27]
We can use infrared light (slightly longer wavelength than visible light) to see through the dust clouds in nebulae to view star formation. Particles scatter light if they are the about same size or larger than the wavelength of the light. Think trying to look through a cloud. Because the dust in nebulae are smaller than the wavelength of infrared light we can use infrared cameras to see through them. Some firefighters use similar tech to see through smoke.
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Posted: 2/22/2015 11:30:05 PM EDT
[#28]
Quote HistoryQuoted:
Impact crater on the moon from the third stage of the Apollo 13 rocket: http://lroc.sese.asu.edu/news/uploads/M109420042LE_thumb.png I'm a huge Apollo program junkie. That's the first time I've seen that picture. Thank you! |
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Posted: 2/22/2015 11:31:52 PM EDT
[#29]
Quote HistoryQuoted: I'm a huge Apollo program junkie. That's the first time I've seen that picture. Thank you! Quote HistoryQuoted: Quoted: Impact crater on the moon from the third stage of the Apollo 13 rocket: http://lroc.sese.asu.edu/news/uploads/M109420042LE_thumb.png I'm a huge Apollo program junkie. That's the first time I've seen that picture. Thank you! |
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Posted: 2/22/2015 11:34:03 PM EDT
[#30]
Tag.
I've got nothing to add, but this stuff fascinates me. |
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Posted: 2/22/2015 11:36:09 PM EDT
[#31]
Gravity sucks.
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Posted: 2/23/2015 12:01:20 AM EDT
[#32]
Do you know what neutrinos and I have in common? We're both constantly penetrating your mother.
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Posted: 2/23/2015 12:02:59 AM EDT
[#33]
Awesome thread! I love this kind of stuff!
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Posted: 2/23/2015 12:20:26 AM EDT
[#34]
Quote HistoryQuoted: Awesome thread! I love this kind of stuff!  |
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Posted: 2/23/2015 12:49:48 AM EDT
[#35]
Very simple video to try to imagine 10 dimensions
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Posted: 2/23/2015 1:31:27 AM EDT
[#36]
Quote HistoryQuoted:
Artist's depiction of the burninator nebula: http://i1222.photobucket.com/albums/dd498/libalj/trogdor_zpsf4ed49f0.png Quote HistoryQuoted:
Quoted:
Awesome thread! I love this kind of stuff! http://i1222.photobucket.com/albums/dd498/libalj/trogdor_zpsf4ed49f0.png I drew that on the dry erase board at the SO's work one time, no one knew wtf it was
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Posted: 2/23/2015 1:44:14 AM EDT
[#37]
I enjoy this thread. I went to the "World's largest Solar System Drive" in Coonabarabran, which is about 6hrs from here. It's 1:38,000,000. I suppose it's classifying itself differently as you can easily do the drive within a day |
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Posted: 2/23/2015 1:57:16 AM EDT
[#38]
When supernova 1987A blew, you would have absorbed a lethal dose of neutrinos at 1AU.
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Posted: 2/23/2015 2:01:12 AM EDT
[#39]
thanks for a great thread!
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Posted: 2/23/2015 2:08:24 AM EDT
[#40]
I love this stuff too.
I've been watching the H2 special on the Universe on Netflix. Some good stuff there, enough that I was following along with some of the OP's posts. http://www.netflix.com/WiMovie/80027663?trkid=13630398 |
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Posted: 2/23/2015 2:13:21 AM EDT
[#41]
Quote HistoryDamn, that's still hard to comprehend but doable. |
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Posted: 2/23/2015 8:45:04 AM EDT
[#42]
Quote HistoryQuoted: Damn, that's still hard to comprehend but doable. Quote HistoryQuoted: Damn, that's still hard to comprehend but doable. If you really want a mind-fuck, look into M, string, and brane theory. Cosmology is wild. Not exactly on topic for this thread, but related since we're talking about the universe. The famous photon double slit experiment. The universe might not be what we think. |
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Posted: 2/23/2015 8:56:28 AM EDT
[#43]
We got into a discussion about colonization of other planets at work.
They all had no idea how we can get a good estimate of the atmosphere of a distant planet... "How do we know if it's not poisonous gas or something?" I tried to explain spectroscopy and electron orbits. Did not work out too well.
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Posted: 2/23/2015 10:13:05 AM EDT
[#44]
Quote HistoryQuoted:
Remarkable resemblance to Uranus. 
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Posted: 2/23/2015 10:31:41 AM EDT
[#45]
Quote HistoryQuoted: If you really want a mind-fuck, look into M, string, and brane theory. Cosmology is wild. Not exactly on topic for this thread, but related since we're talking about the universe. The famous photon double slit experiment. The universe might not be what we think.  http://youtu.be/TT-_uCLwKhQQuote HistoryQuoted: Quoted: Damn, that's still hard to comprehend but doable. If you really want a mind-fuck, look into M, string, and brane theory. Cosmology is wild. Not exactly on topic for this thread, but related since we're talking about the universe. The famous photon double slit experiment. The universe might not be what we think. http://youtu.be/TT-_uCLwKhQ |
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Posted: 2/23/2015 10:50:03 AM EDT
[#46]
Quote HistoryQuoted:
Since what we see is light years old history, how much warning do we get when our universe has some final ending? Light seems to lie to us, not telling us what's now - it tells us what was. Just thinking out loud, actually thought of this last week - but it took this long to get posted. I always wondered about this myself. If you could place a super powerful telescope 100 light years away, pointed at the earth, you'd be able to see a 'live' view from 100 years ago. I don't believe time travel is possible, but this makes it theoretically possible to have a window looking at the past. |
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Posted: 2/23/2015 10:53:15 AM EDT
[#47]
Quote HistoryQuoted: We got into a discussion about colonization of other planets at work. They all had no idea how we can get a good estimate of the atmosphere of a distant planet... "How do we know if it's not poisonous gas or something?" I tried to explain spectroscopy and electron orbits. Did not work out too well. You don't happen to be a chemist? |
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Posted: 2/23/2015 12:11:09 PM EDT
[#48]
Quantum entanglement really boggles my noodle.
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Posted: 2/23/2015 12:54:40 PM EDT
[#49]
Quote HistoryQuoted:
A large enough generation ship, perhaps a hollowed out asteroid, using the Orion Project's nuclear drive technology could support a large enough population, and biosphere. But you'd want several of them to increase your odds of survival. More then likely we'll be supplanted by AI long before that happens. I suspect this really starts to pick up speed over the over the next century. We're very close now. Perhaps initially humans will merge with machine, but eventually our intelligence will continue in a non-biological form. At that point our descendants freed from the constraints of biology will move out into the stars with ease. Perhaps there will be a kind of nostalgic interest in their pre-machine origins, maybe they'll even "seed" suitable habitats, that they find or create, with biological humans and natural biospheres. Quote HistoryQuoted:
Quoted:
Now that's an engineering question for you: how large of a city ship would you need to build to heft a sustainable colony of humans and critters into inter-stellar space with the goal of a) landing on a usable exoplanet and b) re-starting 'earth' as best and as sustainably as we can? I imagine lots of critters get left behind because, oh well but some we consider crucial to diet and health to take with us from the smallest critters to, say, horses and cows. How large a population would be needed to sustain humanity's gene pool health? 10,000 people from every ethnic background etc.? Now, obviously you'd want only people with zero communicable diseases, in optimal psychological and emotional health etc. right? A large enough generation ship, perhaps a hollowed out asteroid, using the Orion Project's nuclear drive technology could support a large enough population, and biosphere. But you'd want several of them to increase your odds of survival. More then likely we'll be supplanted by AI long before that happens. I suspect this really starts to pick up speed over the over the next century. We're very close now. Perhaps initially humans will merge with machine, but eventually our intelligence will continue in a non-biological form. At that point our descendants freed from the constraints of biology will move out into the stars with ease. Perhaps there will be a kind of nostalgic interest in their pre-machine origins, maybe they'll even "seed" suitable habitats, that they find or create, with biological humans and natural biospheres. While it's "merely an engineering problem", we still don't have any successful operational experience running a closed ecological environment. The Biodome failed miserably - they ended up having to pipe in extra oxygen because the biome wasn't producing enough oxygen for a handful of humans. Any machine intelligence will, by definition, not be human. It doesn't matter if you "download" a human personality into it. |
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Posted: 2/23/2015 12:55:23 PM EDT
[#50]
Quote HistoryQuoted:
If you really want a mind-fuck, look into M, string, and brane theory. Cosmology is wild. Not exactly on topic for this thread, but related since we're talking about the universe. The famous photon double slit experiment. The universe might not be what we think. http://youtu.be/TT-_uCLwKhQ
Quote HistoryQuoted:
Quoted:
Damn, that's still hard to comprehend but doable. If you really want a mind-fuck, look into M, string, and brane theory. Cosmology is wild. Not exactly on topic for this thread, but related since we're talking about the universe. The famous photon double slit experiment. The universe might not be what we think. http://youtu.be/TT-_uCLwKhQ
https://www.youtube.com/watch?v=Q1YqgPAtzho |
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