Recent content by Deepblu

It might be speculated that GR is only accurate for small range and is wrong on large galactic scale, which means that dark matter is just an ad hoc to rescue general relativity with no prove it actually exists. But then we have this study that shows galaxies with no dark matter, which suddenly...

Thanks for the insights! It turned out this subject is much more weird that what it looks from the surface! So a simple conclusion is that white holes are impossible.

OH sorry my mistake then

The OP asked about how to visualize 4D space I think he meant 4 Directional dimensions, which would be a fictional 5D spacetime consisting of 4D+ time.

We can't visualize 4D space (4 directional dimensions) but I always imagined that if we are looking at an object moving in a 4D space then it can scale up or down in size while it is moving and it may disappear then appear suddenly, violating normal physical sense, that is only in my own...

Aren't white wholes connected with black holes by Einstein-Rosen bridge? Where matter goes in a black hole then spewed out via a white hole. How can a white hole form without a black hole on the other end? Or how can a singularity form from nothing to create a white hole?

White Holes may not exist, but if we discover that they are real and we find one, then: What a white hole will look like? How it will behave? What will be its characteristics (such as gravity, mass, size ..etc) in relation with it's parent black hole? What will be it's effect on nearby stars...

That does not make sense

Although I respect everyones choice in his favorite interpretation, but I don't like the idea that you are free to pick what suites your taste.. the fact that there are many interpretations that are perfectly consistent with QM predictions doesn't mean they are all correct, they can't be...

TBH simulation theory is laughable ..it is not even a scientific theory it is sci-fi or pseudoscience in best case. I don't understand what is the point of simulation theory! And why it is considered less nonsense than "aliens beought us here" theories!

I am also interested in this.. I read about it before but didn't fully grasp it. Any more insights about this experiment? What does it mean for quantum computing? And what are possible applications?

@davenn I am comparing the The SkyWatcher with the Celestron NexStar. The SkyWatcher seems better to me .. it has larger aperture of 8 inch (vs 6 inch for Celestron) and comes at half price $378 (vs 750$ for Celestron). In general should I aim for the largest aperture when deciding which...

Thanks all for your valuable advices.. My budget is $600 max, so what technical specs should I aim for under this budget? Also I would like to see some stars and galaxies I am not sure if that will be possible under this budget.

I am looking to buy a telescope, what is cheapest telescope I can buy with highest magnification possible? I don't have solid background about astronomy, but I have general interest in it since I was a child, long time ago I had small telescope with max 40x magnification but I was not satisfied...

1- The correct term to use is determinism not randomness, all quantum interpretation preserves randomness but they disagree about determinism, for example you can have perfectly random deterministic model, or a non-deterministic random model, but even in the non-deterministic interpretations you...