/sci/ - Science & Math

>>955559
symmetric get. nice start.

I am told the universe is expanding....?

fuck yes I love astro anything

Can i help?

Hey OP, neutron stars, how DO they work?

No seriously, i don't know why it would just be neutrons instead of a quark mass or something, can you explain it?

Behold, my contribution to the astro-community.

astronomy is the lamest science, it's just a bunch of people sitting around raving about how big the universe is and how pretty stars are. It's like science for women

astrophysics is a little bit better

I'll just leave this here:
http://apod.nasa.gov/apod/

>>955577
He's fucked if that jetpack thingy runs out of fuel.

A professor at my school said that she was measuring the galaxies by monitoring the curvature of space and detecting shifts in red and blue light. My question is, if a point of light is already being affected by the shift of its own motion, how do we differentiate the phase shift from curvature.

If the prof is out there:
> BITCH I WOULD HAVE CALLED U OUT BUT THE ARTSY BESIDE ME MADE ME RAGE ABOUT HIS MAC.

>>955571
Yes it is. Hubble showed that back in the 1920s with his telescope on mount Wilson. If you ever check out his original graph he used to calculate the hubble constant, you'll see he has one of the best fits of a line to data you'll ever find in science. Granted he didn't know certain information like that there were different types of Cepheid variable stars so we has off by a lot. But still, great first step.

>>955575
Yes you may

>>955577
Good.

Crazy how everything looks flat even from LEO

http://youtube.com/watch?v=zSgiXGELjbc
http://youtube.com/watch?v=XGK84Poeynk
http://www.youtube.com/watch?v=vioZf4TjoUI
http://www.youtube.com/watch?v=hOLAGYmUQV0
http://www.youtube.com/watch?v=9Cd36WJ79z4

"Not a sun rise, but a galaxy rise. A morning filled with 400 billion suns, the rising of the milky way."

>>955588

Not OP but I got a C+ in INTRO to Astronomy.

Iirc, neutron stars are sort of like the diamonds of the universe. Basically the matter is as dense as can be without collapsing into a black hole. Hmm, maybe the OP can explain something I remember about neutron stars having starquakes.


Quark matter is somethign that I can't remember, is it the same thing as strange matter? I remember reading something about some strange matter that if it were able to interact with any matter in the universe it would change that normal matter into more of it. Basically it's like a cosmic level grey goo.

dat mars atmos

I FOUND U LAURA PARKER.

http://www.physics.mcmaster.ca/~lparker/LauraParker/Research.html

is the prof's work on galaxy lensing. i do not see an answer in there...

>>955598
>>955642
furfag detected

>>955631

>>955588
Yes I can. When the mass of the star gets high enough and there isn't any fusion force expanding it, it starts to contract. It can contract enough that something known as the electron degeneracy pressure is overcome. This basically means electrons are forced inside the nucleus where the form with protons to make a neutron. Thus the entire star is made of pretty much all neutrons. However the structure of the neutrons is still intact because it takes more pressure to make the quarks be disrupted from their configuration. There are theorized quark stars although no one has ever officially found one.

>>955591
Astronomy is astrophysics. I don't think you know how much physics is involved in any astronomy. And no that's not just it. You need a serious education because there is soo much more to astronomy than just how big the universe is. Did you know if it wasn't for astronomy, civilization would probably not exist? The first civilizations used it for simple things like navigation and when to know to plant and harvest crops.

>>955598
I don't understand this question at all. I sense a real question underneath and I think it is masked by your misunderstanding of what she said.

>>955597
Somebody took that picture
meaning someone was on a craft nearby

Also
Are neutron stars cold?

As OP I'm gonna start using the name Astrofag just so everyone knows its me. Here's a neat site I like to use. This particular portion of the site shows you where all the planets are at any given time. And you can get nifty little skymaps and everything.

http://www.fourmilab.ch/cgi-bin/Solar

Yay for astronomy

>>955645
IM DOING SCIENCE GO AWAY.
>>955650
her site is one big image. its trolling my face off that I can't cut paste.

She uses images to detect the shear in images caused by large bodies in space. I'm saying that if we use the shift of stars into the red or blue directions of the electromagnetic scale to determine the distance from us. How do we not know that the shearing is not affecting the phase shift we use to detect distance?

>>955668
He wouldn't have enough oxygen for them to undock and scramble the shuttle in time.

QUICK
What's your favorite planet

Hey OP I got a question. Do you know any resources you could link me to about what possible types of planets there are in the universe (exotic and otherwise like ice planets or some shit) and/or what types of atmospheres and what color they would appear based on their make?

>>955668
Define cold. Cold is relative. I'd say an ice cube is cold on a hot day but that's pretty darn hot compared so liquid nitrogen. The temperatures around neutron stars varies greatly and ranges from 10^12 kelvin to about a million kelvin.

>>955668
why is the exact center so bright? I know the density of stars gets much brighter near the center but, why and how can the exact center be that bright? wouldnt the stars crash into each other and make a black hole?

>>955650
here is the part that i question. I begin to question anyone saying they can measure the curvature of space, even if the artsy just kept on facebook and trolls me hard

fuck I ran out of nasa pics to post.

>>955688
Played with it for a bit, 7999-12-31 23:59:59 is the absolute latest time/date allowed.

>>955631
Those were... absolutely amazing.

>>955731

HOLY FUCK I RAGE QUIT.

dumb bitch made the text white, the image transparent, and the sites background black. fuck fuck fuck fuck i hate women in science

>>955689
Well Doppler affects for light are fairly complicated. As a younger student in an intro class you may learn that just the expansion causes it but really there are a lot of things. Often astrophysicists approximate Doppler affects by mathematical tools and use the various contributions as factors in the math. I'm sure that's what she does. I can't really explain it more because I don't feel like explaining out math but heres a good example of what I'm talking about. This is about the doppler factors in a relativistic beam of a blazar.

http://en.wikipedia.org/wiki/Relativistic_beaming

>>955697
Venus is pretty neat.

>>955701
No because no one really knows that. Unless you were looking for some sort of sci fi thing in which case I couldn't help. However here is a great site which keeps a 3D interactive map of every known exoplanet and all the information we know about them.

http://planetquest.jpl.nasa.gov/

>>955745
Print screen, put it in paint, crop, save as jpg, upload.

>>955758

Also, I love giant cocks. Deepthroating big black dicks is my favorite pasttime.

>>955758
>No because no one really knows that.

Damn, no theories or anything? Oh well, thanks for the link about the exoplanet exploration though.

>>955760
was already working on it.

What fucking scientist so cleverly hides their work?
One who has no substance of study D:<

Not sure if i wanna read 48 pages of review at
http://xxx.lanl.gov/abs/astro-ph/0305089v2
or if it would even make sense to me

>>955721
Well they certainly wouldn't crash into each other. They all just orbit each other. And secondly, even if they did crash, they wouldn't cause a new black hole. That's not how black holes are formed. The light from the center comes from a variety of sources. Including the light of all the compact and dense stars in the area, the lack of a lot of dust to hide the light, and the emission of light from material falling into the black hole at the center.

>>955749
Because that's when the world will end. Didn't you know?

>>955710
Define the cube's temperature. An ice cube which is 10 Kelvins might be slightly colder than the one at freezing temperature.

Astronomy student reporting in
Pic related its the sombrero galaxy

>>955799
But it doesn't look like a sombrero.

:(

>>955766
Ah yes, thank you. Prime example of why /sci/ can't be awesome.

>>955776
Well there are endless theories and a great many possibilities. You could have an entire college class on how exoplanets work. In fact I have had an entire class on them. Quite some interesting stuff.

>>955787
Now what's your question again?

She uses images to detect the shear in images caused by large bodies in space. I'm asking that if we use the shift of stars into the red or blue directions of the electromagnetic scale to determine the distance from us. How do we not know that the shearing is not affecting the phase shift we use to detect distance?

>>955815
for if we can't calculate distance, how can we calculate shearing of distance?

>>955635

Can some answer this please?

>>955803
You'll find a lot of the time things don't entirely look like what they're named for. Someone one posted the nasa APOD site which is a picture posted for every day since like 1995. They often host pictures of nebulae with names like the christmas tree nebula or the witches broom nebula, however more often than not it doesn't much look like that. There is a neat one though that looks like a hand.

http://apod.nasa.gov/apod/ap100501.html

Does anybody know the name of this nebula?

>>955559
Ah its nice to meat a fellow astronomer :)
Were are in your education BTW?

>>955815
Well first off what I previously said still applies. The doppler shift is not so cut and dry. Check out that relativistic beaming page i posted. Secondly, it seems she investigates information about local "shapes" of the universe, which really doesn't play much of a role in redshifting.

>>955821
If you mean the neutron star part, I already did right here:>>955650. If you mean the quark matter part, I guess that'd just be matter made only of quarks. That kind of stuff doesn't just float around in space though. And there is something known as a strange property of matter. Not that matter is strange, just the property is known as "strange". Much like electric charge or mass or color charge.

>>955846
I'm in my last year of undergraduate degree. Just about to get my B.A. in Astronomy and Physics with a Minor in Mathematics.

>>955844
Why yes I can. That is a nebula in Orion known as M78. You can check it out right here:

http://apod.nasa.gov/apod/ap100302.html

Picture from the surface of Titan.

I'm very interested in planets/moons, much more so than nebulae.

Fucking magnetars, how do they work?

>>956028

I'm not exactly sure. I just remember they have the strongest magnetic fields. I think it has something to do with the way they rotate.

I went and saw a section of the James-Webb telescope being vibration tested at Ball Aerospace a month or so ago, shit was cool, yo.

I'm in high school right now, and i just dropped Chemistry for an IT course, but i'm doing fuckwell in Senior Physics.


Would i need chemistry to study astronomy in university?

Quoting Scientific American through wikipedia, on the magnetic field of magnetars:

"X-ray photons readily split in two or merge together. The vacuum itself is polarized, becoming strongly birefringent, like a calcite crystal. Atoms are deformed into long cylinders thinner than the quantum-relativistic wavelength of an electron."

"In a field of about 10^5 teslas atomic orbitals deform into rod shapes. At 10^10 teslas, a hydrogen atom becomes a spindle 200 times narrower than its normal diameter"

Compressing atoms into 1/200th of their normal size through magnetic force alone? fuuuuu-

best astronomy book please and not pop science

http://cgi.ebay.co.uk/Auth-Tsumori-Chisato-Starry-Galaxy-Top-Runway-Dress-/200471378997?cmd=ViewItem
&pt=Women_s_Clothing&hash=item2ead067c35

Yay for OP.

I'm not too interested in astrophysics yet still intrigued by astronomy [if it makes any sense]. I find astrochemistry awesome [especially the bases of potential lifeforms] for example.
Also got a question. I know NASA has got an astrochemistry department, however the thing is, if I'd want to get into the field, what would I have to do [I'll start to attend a university this year]?

:)

what's the best program for exploring the universe?
preferably free, but whatever
you know those progams where you can go sirius and look at all the stars from there

fireballs are awesome btw

I like nebulae more :)

fireballs are cool though.

>>958689

Celestia. This program is probably exactly what you're looking for.

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>>958689
celestia by far

op, are most of the people in your astrophysics class actually interested outside of uni. or are they camp, just doing it and gonna go get a job at a bank or something?

>>958714
>>958719
thanks guys
i<3earth

>>958729

:3

yay for fesuses

>>958558
The strongest electromagnets that we've created, have a field strength of about 10 Tesla. Ten. TEN. You're talking about MILLIONS and BILLIONS of tesla.

I'm Pisces but my girlfriend is Aquarius, should I dump her?

>>958744

I'm aquarius hook me up

>>958744
No man, you're a fish and she is water. You should enter her as much as possible. Stay inside her, preferably under her.

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