Recent content by nomisrosen

I was just using my phone outside on the first beautiful sunny spring day of the year, when I noticed that I couldn't see my screen at all. I thought about what was happening. My screen, when off, is dark grey/black, and its made up of pixels that can change their colour independently. Since...

Right, but I'm talking about the galaxy as a whole, not just arbitrary points. The galaxy does NOT look like it did when it's light was emitted in the past, because we see a mix of it in different times in the past. Wouldn't this affect our knowledge on supernova rates, the age of a galaxy etc...

Right, but this delay is greatly amplified at supergalactic distances. So, to get back to my original question.. Do astronomers correct pictures or take into account the small discrepancies in their observations? After all, shouldn't this 200,000+ year difference between the near and far side of...

I don't know how to put my question into words so I'll give a brief example of what I want to say. The andromeda galaxy is a spiral galaxy 2.5 million lightyears from earth. When we observe it, we see it nearly on its plane. Light travels at a finite speed, so we see the andromeda galaxy as...

Thank you!

I was wondering what is meant by n-space or n-dimensions in physics. I guess it means anything more than our familiar 3, but why the term n? Wouldn't "x-dimensions" be more appropriate? My main question was whether the term "n-dimensions" has a specific meaning (specified number of...

What does "N-Dimensional" mean? What exactly does the term "n-dimensions" mean? I've also seen "n-space". Please, no math, just a simple explanation! Thanks!

I don't really understand how the universe's geometry can be something real and yet not be made of anything... Are the links basically like guidelines of space that nothing can cross (as in the only way to get from one point in space to another)? Is this a good visualization of how matter...

Marcus, thank you so much! That really helped. The uncertain geometry did it for me. But now, what are these nodes and spin networks made of..? Do they operate at the Planck scale? Also, is there some sort of wave function of probability to know how this geometry might behave in a certain...

the whole thing...im no physicist haha just an average high school student who happens to enjoy reading about physics!

I didn't understand a thing...thanks for trying!

I don't quite understand the properties of loop quantum gravity. I have searched around and have not come up with anything very helpful. I'm pretty good when it comes to understanding quantum mechanics and string theory, but please, NO MATH! I'm only in high school! thanks

Exactly, and I really wish I understood the math behind all of it. Hopefully one day I'll achieve my long-term dream of becoming a physicist. I find it all so fascinating and all I can do is listen to others and adopt their opinion. To get back to my original post, could someone explain why...

I've spoken to quite a few physicists and other highly educated people who have all told me the same thing. They are mostly angered by string theory, which I hope you know, many people see as a big excuse. Don't get me wrong however, I love physics. Hopefully I'll become a physicist myself...

Then isn't imaginary time just some "excuse"? Physicists always do that...if something isn't working, they'll just work around it with some excuse.