Welcome !


Varun's Blog - At the Speed of Light !

A fact is a simple statement that everyone believes. It is innocent, unless found guilty. A hypothesis is a novel suggestion that no one wants to believe. It is guilty, until found effective. ~Edward Teller

A very warm welcome to my th reader.Why speed of light ? Well, the aim of this blog is to reach the impossible by exploration and scientific fervor. Exploration never ends, knowledge never dies but Speed of Light can be achieved ....

Subscribe now

Wednesday, March 01, 2006

Do other universes exist ?

Do nearly exact copies of you exist in other universes? If one or more of the multiverse hypotheses is correct, then quite possibly they do.


The universe started with an explosion called big bang which occured 14 billion years ago.Ever since the universe is expanding.It was an explosion "of" space, not an explosion "in" space.

In earlier times people thought the earth is flat.According to Ptolemy,the Earth stood at the center, surrounded by eight spheres that carried the moon, the sun, the stars and the five planets known at that time, Mercury, Venus, Mars, Jupiter and Saturn.

This is one of the analogy I can put forward.It is called Balloon analogy.A good way to help visualise the expanding universe is to compare space with the surface of an expanding balloon.COnsider a balloon with dots marked on its surface.If the balloon is blown up the distances between the dots increase in the same way as the distances between the galaxies.Universe - balloon , galaxies - dots on the balloon.The surface is homogeneous with no point which should be picked out as the centre. The centre of the balloon itself is not on the surface and should not be thought of as the centre of the universe.So to say that what is the centre of the universe becomes a little meaningless.... read this ....

1. The 2-dimensional surface of the balloon is analogous to the 3 dimensions of space.
2. The 3-dimensional space in which the balloon is embedded is not analogous to any higher dimensional physical space.
3. The centre of the balloon does not correspond to anything physical.
4. The universe may be finite in size and growing like the surface of an expanding balloon but it could also be infinite.
5. Galaxies move apart like points on the expanding balloon but the galaxies themselves do not expand because they are gravitationally bound.

Till now people go by the hubble theory that galaxies are moving far apart due to the continuing expansion force.Rest is exploration based.We cannot assume - We have to EXPLORE and then match our observations with theoretical concept.

2 comments:

Gr81 said...

I really like your balloon concept.. But did you notice that the dots on the balloon will also expand when you expand the balloon?? So then the galaxies should also expand (which dont due to gravity, as u say..)
But I think it is a really inovative idea, though what about other universes... Are they separate balloons or a balloon inside another??
;)

Varun Khetarpal said...

Thanks for showing interest in the entry !

there is nothing like a ballon inside another but of course due to theoritical calculations and possibilities we can say that parallel universes can exist.The are totally independent of each other (view the image in fullscreen in the entry).Each sphere can be represented as a universe and the human eye might represent the possibility that realizations of some multiverse hypotheses might only exist in the human mind. One criticism of multiverse hypotheses is that they are frequently difficult to test.

This is science !

When you are speaking to technically illiterate people you must resort to the plausible falsehood instead of the difficult truth.

Photos of Comet Mcnaught !
Astro-photographer? Send your photos to pics@exploreuniverse.com and have them featured on this blog with your name. Comet Mcnaught : Pictures taken with Nikon D100 on 19/1/07 from Manning Point, northern NSW, Australia by Mr. Peter Enright.
Picture 1
Picture 2
Picture 3
Picture 4

Space News

Astronomy Picture of the Day