/sci/ - Science & Math

>>4988548
>What makes you think our "tech" and their "tech" are compatible enough to actually communicate with each other?
How wouldn't they be "compatible"? I'm afraid you need to elaborate for me.

>I don't think humans will ever colonize multiple solar systems.
I agree that it is very unlikely that humanity will ever commit a trillion dollars to selflessly colonize other star systems for the sake of the species. Colonization has always been undertaken for the sake of survival or profit (and sometimes cultural pressure). But that doesn't mean it won't happen. Consider the following.

Earth runs low on certain minerals and begins exploiting NEO's. Space industry grows and permanent human presence follows. Eventually the infrastructure allows for ships and habitats to be manufactured and fueled entire in space, leading to exponential growth of space industry and space colonization. Hundreds of years later humanity has spread to the very limits of the Solar system, where human colonies nomadically move from comet to comet spending entire generations mining single comets before spending several more generations moving on to the next. Eventually a single colony ends up over a light year from Sol on the edge bordering the Alpha and Proxima centaur system, and they are presented with a choice, spend several generations going towards the nearest comet closer to Sol, or spend a few extra generations making the jump to a comet even further out, one that is headed towards Proxima. Humans may colonize for the sake of survival and profit, but deep down they are willing to go an extra mile just for the sake of boldly growing where no human has gone before. Sooner or later someone will make that gamble and leap into the darkness, and once we start we'll never stop.

>>4988399
Yeah, I know about the scale of things, but they would have been transmitting for millions of billions of years. Assuming we'd hear them (and I said in my last post that we likely would hear them), that means they either don't have any colonies within a range that we could hear them or they aren't out there. Again, they've been up there for hundreds of millions of years, why would they colonize the galaxy but leave our little corner untouched? Is it really that hard to colonize star systems that it couldn't be done after hundreds of millions of years? That in and of itself is a scary thought.

>>4988377
I admit that alien civilizations wouldn't likely be making any effort to contact us nor might they be using communication methods that are "loud", but I find it hard to believe that their vast communication and industrial infrastructure is practically invisible.

Again, I'm not saying it's IMPOSSIBLE that there are interstellar civilizations, I just believe isn't likely. But then again, I admit I might have a slight bias. I want humans to colonize space eventually and making people believe that we likely won't unless we try really hard might just scare people into supporting space exploration and exploitation. I feel like too many people don't care about space because they figure humanity is invincible and that their great grandchildren will be the ones who make an actual effort for saving our species and, in their minds, making the Jetsons a reality.

If intelligent life is out there, colonizing the stars, then where are they? Why don't we hear them?

It seems likely that space fairing intelligent life is very rare. They either destroy their civilization through atomic or biological means or they consume their non-renewable resources before creating a foothold in space, and end up living on the surface of their planet for the next couple million years before getting wiped out in the next mass extinction.

If they were up there, then they would have colonized the entire galaxy by now. It doesn't make sense for a interstellar civilization to bend over backwards to keep primitive worlds from knowing they are not alone.

>>4957126
We aren't hunter gatherers any more. We don't need 15,000 calories a day. This line of reasoning is pointless.

>>4850743
I don't withhold compliments unless I know the person I'm communicating with only cares about "winning" an argument, in which case I don't argue with them much longer regardless.

/sci/ can be pretty damn civil if you avoid the troll threads.

>>4850621
>Bear in mind the REALLY average buyer is not going to give a shit anyway. He doesn't read the label.
The average buying doesn't have to care. What matters is whether or not a significant portion of the population cares. You don't have to remove a company's entire consumer base to harm said company.

And good point with the possible monopolies GMO's might produce. I never thought of that.

>>4758355
That was well put.

RESPECT

>>4644248
yes

>>4644228
E = energy (kg m^2 / s^2)
m = mass (kg)
c = speed of light (m / s)

metric

>>4641672
I could do something indeterminably chaotic.

FYI, "Insane" is just a legal term.

Every day there is another peak oil thread. Is there a bunch of hoopla in the media about peak oil currently?

>>4641129
>>4641121
Don't be dicks. No one knows everything. How about you spend your time mocking people who actually resist learning instead of the people who simply don't know something.

>>4641117
Effects? What do you mean? We have no reason to expect anything special is happening in the surrounding space. Gravity is gravity. The gravitational force of our Sun and a black hole of the same mass is the same at a distance.

>>4641107
>What's the model that says there must be a black hole dimming the light from a distant star and not, say, a cloud of dust or some other body blocking the light?
Because that's how the math works out.

>>4641083
On the topic on the existence of black holes, we predict that there is a point at which matter can be forced together through stellar events where no force could hold its collapse back. We see stars orbiting seemingly empty space. What other evidence would one need?

animated gif related

>>4641046
Because that's how the math works out. What's the wavenlength and intensity of the light? What is its duration? If the data matches a model and that model exclusively than its as correct as correct can be.

>>4640947
>>4640964
Correction, type 1a supernova are the fusion of accreted gasses on the surface of white dwarfs, not neutron stars.

>>4641004
Why is that funny?

>>4640965
Black holes are more massive than the Sun thus the effect of one approaching us would be felt long before it began devouring anything. If it were moving very quickly relative to the solar system such that we wouldn't feel its effects until long before it reached the planets then it would rocket through our solar system and fling most planets every which way.

>>4640965
Black holes are more massive than the Sun thus the effect of one approaching us would be felt long before it began devouring anything. If it were moving very quickly relative to the solar system such that we wouldn't feel its effects until long before it reached the planets then it would rocket through our solar system and fling most planets every which way.

>>4640947
Yes, and that accretion happens in star systems containing at least one neutron star and at least one relatively run of the mill gaseous star.

>>4640930
I assume it is a simulation since the event they are talking about in the article is over two billion light years away.