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/sci/ - Science & Math

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1360078 No.1360078 [Reply] [Original]

>PhD's in astronomy and astrophysics
>don't care about money
>inspiring humanity to reach beyond the stars

>> No.1360099

What are the differences between astronomy and astrophysics?

>> No.1360110

>>1360099

Astrophysics is a specialized field of astronomy which deals with, well, physics in space.

>> No.1360112

>>1360110
astrophysics vs cosmology?

>> No.1360153
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1360153

>PhD in cannabis
>any potency I want
>25% starting

>> No.1360161

>>1360112

Cosmology is just a general term for researching the universe. Ain't no PhD for cosmology, son.

>> No.1360166
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1360166

>> No.1360168

>>1360153

There is an equation to suggest the number of dispensaries in the galaxy. They call it...

the dank equation

>> No.1360171

>>1360112
What kind of stuff does one have to know to be an astrophysicist. All I can definitely say is knowing about the math behind orbits, but that is hardly complicated enough to warrent a PhD. Do you have to know about stellar fusion and shit?

>> No.1360180

vaguely, astrophysics is the study of objects in the observable universe and cosmology is the study of how those object got to be what they are, from the big bang till now. obviously there is overlap.

>> No.1360204

http://www.youtube.com/watch?v=iJGc4ABfVZ8&

found the holy grail!!!

>> No.1360212

When has Sagan ever said he smoked weed?

>> No.1360214

in my experience the people who identify as astrophysicists are experimentalists. so they dont need much in terms of high level math or theory, but a lot of skill gathering and analyzing data.

>> No.1360248

>>1360212
he wrote some essays under the pen name mr. x

http://marijuana-uses.com/mr-x/

>> No.1360266

I'm learning how to talk stop-and-start just like Carl Sagan.

I've definitely noticed a shitload more people paying attention to me.

>> No.1360270

>>1360212

it is a myth

>> No.1360399

>>1360266
Do you use the word "billions" every other sentence?

>> No.1361165

>inspiring humanity to reach beyond the stars

But tried to dissuade people from using nuclear pulse propulsion. Didn't like weapons and war in general dispite their use in propogating scientific advancement, due to a conflict with his personal philosophy.

Many other scientists(me included). Don't care how technology is used so long as it is developed. Don't care about philosophy. Want uthless expansion of the human domain no matter what.

Sagan is small time.

>> No.1361168

>>1360399
Sort of.

>> No.1361176

>>1360266
it's because you probably sound like a freak dude

>> No.1361185

>>1360078
A PhD in Astrophysics would know that such an endeavor is impossible.

>> No.1361207

>>1361165
So there is nothing wrong with ruining the liver of an adolescent with steroid injections to make him develop quicker? There are other things to consider than what you are defining as development.

>> No.1361221
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1361221

>>1361185
Nothing is impossible! Not if you can imagine it! That's what being a scientist is all about!

>> No.1361331

>>1361207
If it causes not adverse affect that would reduce his functionality latter in life, then no there wouldn't be anything wrong with it. It's no worse than giving him a vaccine, it may cause an alergic reaction, but I probably will make him immune to a life threatening disease.

Same thing with Project Orion. Sure using nukes to lauch a battleship sized ship that can get to Saturn in two months may kill 0.1-10 people prematurely depending upon wind and how many alpha/beta particles they ingest, but its probably worth it.

And if anyone thinks we don't regularly exchange lives for progress then know that for every building greater than ten stories in height that we build we expect one on site death during construction. We don't like to trade lives for advancement, but that's just the way it is. To think it could ever be different is to be an idealist, risk will always be a factor in any venture.

>> No.1361340

>>1361221
It thougt it was about making objective observations and testing formulated hypotheses using reproducable experimentation.

maybe i'm thinking of the wrong thing

>> No.1361362

>>1361331

>functionality later in life

He should get used to functioning perfectly normally with a tiny dick, then.

>> No.1361391

>>1361165


Well then. You're one hell of an asshole.

>> No.1361461

>>1361165

Bullshit, I just finished reading 'Cosmos.'

"Orion was under serious development in the United States until the signing of the international treaty that forbids the detonation of nuclear weapons in space. This seems to me a great pity. The Orion starship is the best use of nuclear weapons I can think of. "

Pg. 171 - Travels in Space and Time.

>> No.1361499
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1361499

>>1361461

>> No.1361526
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1361526

>>1361340
Huwuh? Oh yes, also that... but mostly imagining the impossible!

>> No.1361540
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1361540

>>1361526

WHAT?

>> No.1361557

>>1361526
>18 KB, 210x157
>>1361540
>10 KB, 210x157

How the hell is the top one twice as large but without any noticeable difference?

>> No.1361568

>>1361557

SCIENCE.

>> No.1361571
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1361571

>>1361540
Quit mocking me you damned kids! Don't think I don't see you out there on the lawn!

>> No.1361611

>>1361461
I'm talking about the about the time in the 80s when Orion was brought up as a possible return to the moon or mars flyby option that could improve the relationship with the Russians since the Outer Space Treaty and SALTII would force it to be a joint venture.

Sagan shot it down. I get the impression from his public statements that he was vaguely anti nuclear in general.

>> No.1361625

>>1361557

Compression/jpeg quality, or a higher DPI then the a standard 72 dpi screen can handle

>> No.1361635

>>1361557

Compression factor during jpeg encoding makes the difference.
If you analyze the second picture you may find more artefacts than in the first picture.

I think the author of >>1361540 took the picture from >>1361526 and used paint to slightly change it (to avoid flood detection).
Paint has uses a high compression factor by default ..

>> No.1361688

>>1361611

Really? I just glanced through the Wikipedia page for project Orion, and couldn't find anything about that. It says "The Partial Test Ban Treaty of 1963 is generally acknowledged to have ended the project."

Anyways, Sagan wasn't really anti-nuclear. He was a pacifist above all, and he opposed the nuclear arms race of the cold war. He was worried that it would end with the annihilation of human civilization, which must have seemed like a real possibility at the time.

>> No.1361708

Hey guys, just trying to learn a little astronomy. Any ebook or video you recommend? All I've seen Into the Universe with Stephen Hawking.

>> No.1361718

>inspiring humanity to reach beyond the stars

whats beyond the stars?

>> No.1361750

>>1361718
We dont know thats why he inspired _-

>> No.1361785

>>1361688
The Salt2 treaty and Outer Space Treaty were the nail in the coffin. Also NASA has to give out all the information on its projects. And since this one involved tactical nukes that cost less than 10,000 dollars each, it would have to be a military project.

Sagan had some problems with this, http://www.youtube.com/watch?v=8rEa9ACC-TM&feature=related, because of the radiation which everyone else under the sun(including Freeman Dyson) said would not be a big problem. If you listen to the other linked videos he also seems to show mild distain for any weapons prodject, despite the fact that "the application of science" in his own words can provide as much new data concerning engineering as raw theoretical research.

It's not that I'm saying Sagan can't have his own political opinion, but rather that he often couched his philosophical point of veiw as a scientific fact rather than simply saying if something were possible. I don't like when people do that, no matter how respected they are. If it's an opinion present it as such.

>> No.1362091

>>1361718
Nothing, since matter defines space everywhere there is space there is matter. The current hypothesis is that universe is closed and circular. So if you go far enough in one direction you end up back where you started.

Unless we're talking about String shit and different hypothetical states of matter and dimensions.

>> No.1362178

>>1362091
>The current hypothesis is that universe is closed and circular. So if you go far enough in one direction you end up back where you started.

Bzzt wrong.

>> No.1362187

>>1361718
More stars, duh.

>> No.1362286

>>1362178
I believe you mean finite and unbounded.

>>1362178
Show me evidence suggesting it isn't finite and unbounded.

>> No.1362303

>>1362091

The universe is flat.

>> No.1362306

>>1362187
lol, imagine Sagan saying that.