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Archive for the 'Astronomy' Category

Sep 21 2009

Universe a virtual simulation ?

It is very easy to jump on the bandwagon of pseudo intellectualism but unfortunately it is useless to do so. The universe may be virtual, try going without water for a few weeks or slit your throat. Whats hunger and whats pain, just a few neurons buzzing around in an organ called the brain right?

We perceive a lot through our senses but our understanding of nature goes far beyond the senses. Besides, what do you mean by virtual? All that lingo is suited for sci-fi films not for actual science. Knowledge comes from perseverance and the pursuit of answers, not by sitting down and proclaiming that every thing is virtual. Even to perceive something as virtual some sense organ is needed. As long as a sense organ exists, it will have a physical existence and hence physical reality always will super-cede any spiritual notion.

Please try reading a book on quantum chromodynamics, Bose-Einstein statistics and Fermi-Dirac theories and then try incorporating spirituality into them. If spirituality is really meant to be the absolute truth then it should encompass all these theories right?

Once you can explain the results of the aforementioned experiments/theories then maybe we can regard such spiritual gibberish as an alternative explanation. Till that point, it is just escapism… an attempt to dilute the harshness of the real world with sugar coated fantasies.

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Aug 31 2009

Documentary videos

If you can acess the DVD store of discovery or any other dvd store near you. then look for the dvd’s mentioned below in this article. these are some of the good  documentaries.

Some of these documentaries are featured on discovery channel programs. some are still featured regularly. so if you want to have them as in your collection then you can take a look at this list.

Here is the list

1.Discovery - Ultimate Access Niagara Falls 720p HD
2.Discovery - Man Vs Wild Season 5 complete 12 Episodes
3. Discovery - How it is made..? 10 Episodes
4. Discovery - Destroyed In Seconds
5.Discovery - Naked Science - Asteroid Alert 720p HD
6.Discovery - Naked Science - Pluto Rediscovered
7.Discovery - Megaworld - Dubai 720p HD
8.Discovery - Future Weapons Series2 complete 13 Episodes
9.Discovery - Man vs Wild Season 1 complete 9 Episodes
10.Discovery - Human body pushing the limits 4 Episodes
11.Discovery - 100 Greatest Discoveries - Astronomy

National geographic videos are also worth in collection. You may try these.

National geographic videos are also worth in collection. You may try these.

1.National Geographic - Death Of The Universe
2.National Geographic - Megastructures - Reinventing Hoover Dam
3.National Geographic - Journey To The Edge Of The Universe
4.National Geographic - Naked Science - Bermuda Triangle
5.National Geographic - Afghan Heroin The Lost War
6.National Geographic - Space Mysteries Comets Target Earth 720p HD
7.National Geographic - Megastructures - Machine Guns 720p HD
8.National Geographic - On Board with Air Force One
9.National Geographic - Megastructures - USS Virginia

Do suggest me more documentary videos,if you know more videos.

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Aug 30 2009

Does Hubbles law imply big bang ?

I am probably explaining this for the billionth time.. well here goes with one another question.

 Q: suppose u r standing on new delhi station and u see a train moving toward kashmir and another train moving towards kanpur. so unless u find the trajectory of the train as a circle with new delhi station as is centre u can never say that they were at the same time in new delhi station . in the same way if u cant find the trajectory the end of the universe . and that to calculate it is a sphere how can u say that distant galaxies were at the same place .

The mathematical flaw in you approach is that you are regarding New Delhi to be a fixed reference point which is impossible to obtain. A more practical scenario is where you consider New Delhi itself to be moving towards/away from Kanpur/Kashmir. Thus this problem reduces to one of triangulation and it is possible to extrapolate the motion of all three bodies based on that. NOTHING is expanding INTO pre-existing space. Space is an outcome of the Big bang and it is space itself which is expanding. Space did not exist and if there is a boundary to the universe then there is no space beyond it.Also, we are limited to observing only a finite part of the universe and as such it is impossible to describe the geometry of the Universe. However, based on the mass density and certain sensible assumptions, it seems probable that the universe follows a Kaluza Klein geometry. The simplest example I can think of is probably the Mobious strip which is bounded in three dimensions but has an infinite edge. Quite possibly, as we are limited to observing only a few dimensions, we may see the universe as infinite but it may not be so. You can refer to the Brane theory for details.

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Aug 10 2009

Religious people : a view from non-religious side

Actually, I don’t think religious people are stupid. Some of them are ignorant, but that’s not the same thing as being stupid.

Look up “optical illusion” on wikipedia . Look at all the different optical illusions collected there, all of the ways our own visual system tricks itself into seeing things not as they really are. Just looking at them, they remain illusions, one has to analyze them properly to break the spell. Measure things, cover parts of the image, different ways of breaking the spell of different illusions.
We see optical illusions because of the way our brain is organized, and it is not just our visual system which is organized that way. There are a million ways apart from the visual that our minds “insist” on seeing things not as they really are, and a million different ways to analyze things to break the spell of those mental illusions.

The fact that any of us see through any of the veils of mental illusion is a wonderful thing, but it is a trap to think that you have seen through all of the veils.

Religious people are seeing the illusion of god and have not yet found the mental trick that will break through the spell of illusion so they can see the illusion for what it is. They may even have seen through some other illusions, but they are stuck on the god illusion.

We are not stupid when we see an optical illusion that disguises what is really there, similarly the religious are not stupid just because they are stuck on one illusion that you may have seen through.

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Aug 05 2009

Boundary of Universe

Although there could be numerous possibilities. Even our current limited knowledge provides many possibilities like -

1. End of Universe as in distance.
2. There are multiple dimensions.

If we think from distance perspective. We know,a galaxy is a collection…gravity bounds everything in it and gives it a picture that we call galaxy. Similarly we have galaxies group where numerous galaxies are just one cluster. If see there is sufficient distance between galaxies to galaxies, and, cluster to cluster.

Similarly we can say there could be numerous universes. However, they are so away from each other that. Probably a trillion universe like ours might fill in between the empty space of two close galaxies. They might as well have different physics because such such huge space difference allows them to hold different laws. Probably the distance is so great that not even slightest gravitation of our universe reaches them.

Now lets next possibility - multiple dimensions. This is amazing!!

Just imagine, how many one dimension object (assume a dot) you can fill in two dimension object, say a line. Answer is unlimited. Similarly, extend this logic for filling two dimensions into three dimension. Answer again is unlimited.

We human and everything around us is three dimension, happily living in 3 dimension universe. However, there could be numerous such universes lying in 4 dimensions.

Boundary of Earth

Yes, scientifically boundary of earth includes -
1. The solid sphere we live at, ofcourse including oceans.
2. Atmosphere, that scientists have divided into 3-4 layers and extends some hundred kilometres from earth (I guess the last is Ionsphere)

In short, when earth revolves around sun, whatever it carries along with itself is earth and the border will be its boundary.

We don’t even need to think any beyond since it is sufficient for our understanding.

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