/sci/ - Science & Math

Come on! This is a genuine, 100% troll free thread!

>1441145

100% troll free thread? On my /sci/? What is this madness?

On topic, our sun is 4 1/2 billion years old. Each star is unique in its own, but the average life of a star is roughly 10 billion years.

>1441190

Sol.

Bump for sun thread and anti trolling thread.

Also, what's the other name for the sun, aswell as the moon, (inb4 luna)

>>1441193
That was it.

Sol is a yellow dwarf with a spectral classification G2V.
It's metallicity is .0177 which puts it firmly in the group of first generation stars.

>>1441190
Sol. Luna for moon.

Bump for moar knowledge

The sun is a mass of incandescent gas, a gigantic nuclear furnace where Hydrogen is built into Helium at a temperature of millions of degrees.
The sun is hot.
The sun is not a place where we could live, but here on Earth, there'd be no life without the light it gives.
The sun is large; it is so large that if it it were hollow, a million Earths could fit inside. And yet, the sun is only a middle-sized star.

>>1441224
Nah there was another name for the moon, it was on Qi.

>>1441182
Moar info on 'coronal hole'? Que es esto?

>>1441249
in b4 bitches crying how insignificant we are.

Feed the thread!

Our sun is currently running on Hydrogen on fuel, and will continue to do so for another ~5.5 billion years. Once all of its hydrogen is depleted it will start using the next heavier element, Helium, as a fuel source. When this happens, it will become much more luminous and make the Earth uninhabitable. :)

>>1441283

>depleted

Wrong. Simply not in the right place.

>>1441293

>> Implying a can of petrol in the backseat of a car is suddenly not classed as fuel.

>>1441283
But evolved beack into niggers to withstand the heat?

I want to see the moment a star is colliding with another star. Right at the moment they touch.

Keep the anti-troll thread alive!

>>1441306
Yeah, I don't think it would be anything like you imagine. For instance... Look at the sun. Look directly at our sun. Now double that, but make it even brighter. Eyes bleeding yet?

Also, stars don't really "collide" so much as "merge" since they are gaseous and liquid, not solid. It wouldn't be a single moment, either. That process would likely take years, casting off much of their mass as their gravitational fields pull at each other in a high-speed orbit, likely obscuring all view of the good bits.

>>1441306

Specify what you mean by 'touch'. The heliosheath of the sun is approx. 80 to 100 AU away from the centre of the sun.

A photon emitted from the sun's core would take millions of years to work its way to the surface (suns radius is 6.96×10^5 km). After that, it would take less than 9 minutes to reach our planet, which is 1.49×10^8 km from sun.

>>1441283
What happens when there is no more Helium ? Lithium star ?

>>1441369

>>1441369
>>1441397

Describing a simulation in which one star crashes into another about twice its size at a speed of about half a million miles per hour, ''the small one actually plows through the larger one and tears a furrow,'' said Dr. Joshua E. Barnes, an associate professor of astronomy at the University of Hawaii.

The crash sends a splash of gas into space while the smaller, denser star burrows to the center of the larger one.

''There's a huge wave that gets set up in the larger one, and it's going to splash around for while,'' Dr. Barnes said. ''The bigger one is wobbling around.''

What happens after that is not clear, because the simulation only covers the first 12 hours.

>>1441462
''After that initial violence dies down, you've got an object that in many respects is not a proper star,'' Dr. Barnes said. ''It's all swelled up, and internally, its temperature structure is not what you expect for a star. Getting through this intermediate stage where this new formed blob is sorting itself out and trying to turn back into a star, that's a long process'' lasting from 100,000 years to 10 million years.

>>1441440

Carbon

The sun is btw called sol in many languages. Swedish inclusive. (The sun = Solen)

It would be nice to know other names for it as well.


Here is a picture taken by the SDO ( Solar Dynamics Observatory). I dont know any details tough.

Whats it made of? Lava?

>>1441518
Back when trolling meant something...

>>1441518
The sun is made of hatred and magma

>>1441440
Once there is no more helium, there is no longer enough pressure generated by the radiation from fusion to stop the star's main body of gas from collapsing in on itself. This is the death of a red giant, and has a few possible outcomes. Neutron stars, black hole, white dwarf, and either a nova of some type, or supernova.

>>1441518
>>1441544
You guys went full retard

>>1441493
In ancient finnish the sun was called Päivä, which seems an original invention. The more recent and current Aurinko has an obscured history, but is thought to come from the latin word Aurum(gold).

The galeic name for the sun is grían, whichcomes from the proto-indo-european word denoting glow or grey.

The japanese have the 日 to denote sun. This seems to be a stylized and evolved version of the crossed circle, which is one of the oldest, if not THE oldest common symbol used by ancient peoples.

>>1441559
On that note, a supernova is not simply an explosion. When the gaseous body of the star falls inward, it accelerates to relativistic speeds. What's going to stop it you say? A gigantic atom with a nucleus the size of a large city composed entirely of neutrons. This "neutron star" is quite incompressible, more so than anything you can imagine, or anything else we know exists. So this gas, traveling very fast eventually hits this little hard ball, and in a fantastic display, simply bounces off. This is a supernova, and is the only way we know of so far to produce any elements heavier than iron.

>>1441586
Supernova ~7500 years after explosion.

I love topics about space and celestial bodies... ty

>>1441268
Bump for answer.

i love the sun! hopefully we can leave this rock before our sun explodes. ( or at least before it increases size and mass)

>>1443136
Weren't carbon credits supposed to fix that?

I would like to think that we might someday FIX the sun and prevent it from going all red giant and stuff.

>>1443176
carbon credits?!? sounds interesting. Ive never heard of them and you seem to know a little moar than I on this. Can you enlighten my please?

That would be great. Planet Earth is beautiful. I also want to see our solar system though since all the gas planets will turn into rock but un4chanitly the smaller rocky planets are engulfed by the expanding sun. I would also like to see our sun's super nova. But there is no way...

>>1443223
me*

>>1443176
>FIX the sun and prevent it from going all red giant and stuff.

You'd have to put all the energy put out by the sun back into it somehow.

Our best bet is abandoning the solar system all together.

>>1443238
Nah, I don't like that. The earth is too fragile to move to another solar system - all the life forms would die, and then get freezer burn, and then taste "off." Much simpler just to teleport He4 out and H in, traded from some other star without planets. Or with planets, if you are amoral and don't like them...

>>1443361
well america would rely on the shitty corporations and build one of them super bags( you know one that you can put meat in it and nothing ever gets freezer burn.) to fit around whole Earth. So that way nothing on Earth gets freezer burn and we still go around the universe.

pic is home, its us. Wanted to post something american or the actual product of the bags. (forgot the name.

>>1443510
)

>>1443176
>>1443223
Carbon credits are to regulate how much carbon emissions a factory can produce in a year. It has nothing to do with the sun.

>>1443238
Indeed, simply moving would be the best course of action. We do the same thing already here on earth: A volcanic island is going to erupt and we know it... We don't try to stop the volcano from erupting, we just move to another island. it just makes sense.

>>1443510
In 5 billion years, America won't exist. Also, quite likely, humans as we know it won't exist either, though there is a chance that we may be their descendants. That is, of course, assuming we don't kill our selves or get killed in the mean time. There is still plenty of time for stupid shit to happen.

>>1443569
>we may be their descendants
er.. fuck... I meant the opposite of that... Forefathers? I can't think of the term.

>>1443569
too pessimistic

>>1443592
No, just realistic. You forget about continental drift and how often large bodies collide with planets, many of which are easily capable of wiping us out entirely. Not to mention we are always getting better at killing our own species. On top of that, how many species have lasted longer than 1 billion years? None to very few? I don't know for certain if there are any at all, but if there are, they are very few.

After 5 billion years of evolution (and genetic modification) humans (as we know it) will not be the same. Keep in mind that's not necessarily a bad thing!

1 billion years actually, no more life on earth. the sun goes all red giant and touches earth

>>1443631
Last I heard, the estimates were still another 4-5 billion years before it switches fuels. Any source on your 1-bil estimate? Looking for mine in the mean time...

>>1443640
Yeah, it still has more time to go.

http://en.wikipedia.org/wiki/The_sun#Life_cycle

Lazily citing wikipedia, as it already has other sources cited.

>>1443618
http://www.ted.com/talks/hans_rosling_on_global_population_growth.html

http://www.ted.com/talks/matt_ridley_when_ideas_have_sex.html

to people means moar opportunities. moar room for specialization people to focus on sciences., may maybe find a way.

bump

>.<

>>1443742
That doesn't address long-term evolutionary or genetically modified changes in a species over a period of billions of years...

Yes, if we (intelligent life) last that long, I can pretty much guarantee we'll find a way off this rock. I think people put too much value on he planet. Move the planet? Really? It's just not worth it. There are plenty of alternative habitable planets out there, the only problem is finding and getting to them, but we have plenty of time to figure that one out. Hell, we already have some pretty good ideas that are being worked on.

I didn't mean to sound like I don't think that we'll make it there, honestly I hope we do, but it shouldn't be ignored that there are many very plausible ways for us to be wiped out before then. In other words, there are bigger things other than our sun blowing up to worry about!

The core is around 13-15million K.
The surface is only 5000k.

>>1443843
I'd love to see what humans are capable of in another 1000 years, in the last 200 years we've gone from steam power to testing fusion power. Gone from horses to rockets that could probably get to Mars.
If we dont get raped by something we will become amazingly advanced I belive

>>1443893
Indeed, but it's a depressing thought that you'll never live to see that day... My solution for dealing with that problem is to try my best to advance whatever technologies I can so that the next generation or the one after won't have to wish that such awesome technology was around!

I haven't created the future yet, but I hope to eventually, or at least have a helping hand in it.

I thought they found out that the sun was powered by gravitational collapsing.

I saw an awesome animation that opened my eyes to an odd fact... The sun (and the solar system with it) aren't casually orbiting the galaxy like our planets do. Instead it orbits on a wobbly and almost haphazard path through the cloud of other stars that are also whizzing all over our arm of the Milky Way. The animation showed white dots on a black background whizzing all over, (mostly) in the same direction. I want to say is was in Carl Sagan's Cosmos, but I can't remember for certain... Does anyone know what animation I'm talking about?

>>1443940
Gravitational collapsing? You mean gravity pulling all that mass toward the center so hard that it fusion occurs? If that's the case, then duh...

Or do you mean something more mystical like gravity it's self collapsing? Since we don't really know what gravity is, I don't think that would be anything more than a popularized hypothesis...

>>1443941
Yea, our solar system is actually travelling 220km/s or something whilst we are travelling 27km/s around the sun. It would also mean that we've been around the entire galaxy 16 or so times.

>>1443843
oh yea... i forgot we were actually talking about the planet.(im high) Yea I was joking, It does sound ridiculous.
"If we do than well thank jesus since I beleive in him" this is where religion fails. Why the fuck did god create humanity to last only so long. That was kinda pointless god.

>>1441182

The Sun can;t be 4 and half billion years old cause God created it 3000 years ago

Athiest status:

[ ] Not Told
[X] FUCKING TOLD

When exactly is our next solar storm due? I heard somewhere about May 2013.

>>1443953
No, the sun is contracting and its falling generates its heat. It was something I got taught by my Earth Science teacher, but I think he was dumb.

>>1443989

no usch thing

>>1444001
I think he means the result of a solar flare hitting our atmosphere. Such events really do wreak havoc on sensitive electrical equipment if not properly grounded. Very northern settlements get it the worst, as they have even less shielding from the earth's magnetic field and the storms can even knock out power up there. It creates spectacular auroras though.

>>1443973
Troll Status
[X} CONFIRMED
[  ] NOT CONFIRMED

There are hypothesized to be different generations of stars.

When the Universe was first formed there was limited helium and mostly Hydrogen so the first stars that were made had to produce all of the rest of the elements in the Universe. These stars went Nova spreading these elements out into the Universe.

There were second generations stars made with the exploded guts of the first generation stars which in turn created even more variety of elements in the Universe which in turn went nova and spread the elements out.

Unfortunately I am not sure if we have ever found the first generation stars or not. We should be able to see light from first generation stars but I don't think we have as of yet.