What are your thoughts on this new ruling from the administration limiting the visa term for international students? Is there any way this can be stopped like the previous one was (about international students leaving the country if they take all in person classes during the fall)?
This is the...
Right, that's very true. I think isolation in particular has been pretty bad, I noticed it first hand when I talked to one of the graduate students for like 20 minutes and instantly felt better. But yes, I will try and do my best, thank you! :)
Yes, I need to learn to maintain a balance, not be too focused so that I ignore everything else but also not be whatever I am right now!
True, just need to get my head down and study!
Well, I've just started here (mainly online) so probably they don't have an opinion of me. But I'm doing my...
Hey everyone!
I started Astronomy Ph.D at a very good (as good as any top university) university this fall but I'm struggling a lot and it's only been 3 weeks! The problem isn't the amount of stuff that I have to do (I am taking two undergrad classes, one grad class and am being a TA), it's...
Thanks for all your responses! I have the answer to my 2nd question, my naive assumption was grossly incorrect. But what about my first point?
Vaguely, let me look up more on that and it might solve my problem. Thanks!
Most of the calculations that I have seen that measure the area of the Sky involve doing this:
2*pi*r = 360. => r = 57.295 degrees. And then 4*pi*(57.295)^2 = 41251.83 square degrees. Now the units check out fine, but here are the places where I am having trouble understanding this derivation...
In the Wikipedia article for CvB, it mentions the following: "The above discussion is valid for massless neutrinos, which are always relativistic. For neutrinos with a non-zero rest mass, the description in terms of a temperature is no longer appropriate after they become non-relativistic; i.e...
But wouldn't the emitter need to have been moving at the speed of light for it to have reached a distance of twice the distance from the Earth to the point when it first emitted the light that was observed on earth?
By non-convoluted, you mean no expansion/contraction, right?
To clarify, dark...
So, as I understand it, the photons from the microwave background were the result of photon decoupling. Now, if I remember correctly, because of the accelerated expansion of the universe, the diameter of the universe is not about 28 Gyr, but about 90 Gyr, the consequence of which is that there...
Understood, thank y'all so much!
Read this line 8 minutes after posting the above message:
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Isotropy around any point in the universe, such as your navel, combined with the Copernican principle, implies isotropy around every point in the universe; and isotropy around every point in the...
In the book, it states that a universe is isotropic if it looks the same regardless of which direction you look at large enough scales. This seems fairly easy to prove these days with observations from galaxy surveys and the CMB. However, how can we possibly prove that the university is...