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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 ....

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Monday, March 06, 2006

Why isn't the universe burning ?

Firstly I should mention that there is another fabulous discovery in the solar system. Jupiter has another red spot.Christopher Go of the Philippines photographed it on February 27th using an 11-inch telescope and a CCD camera:

There are trillions and trillions of galaxies in the universe which in turn have billions of massive stars.So why isn’t the universe hot ? Instead it is freezingly cold.Why doesn’t the universe burn due to heat.Some people would argue that the space is all vacuum but its not like that everywhere.Some places are still having matter like regions of dark matter instead of vacuum.

The thing is energy infact Heat travels from the stars to other parts of the universe through the process of radiation and in this process there is no need of any medium.This is so because heat infact Light travels in the form of electromagnetic waves which are transverse in nature and don’t require a medium for propagation.

Now the light (carrying heat) reaches other planets or I should say heavenly bodies which in turn get heated up and the heat is generated on them and in their surroundings. In all this process the medium stays unaffected hence the space remains unaffected and the universe remains unaffected.Due to this reason its very cold.


astroboy said...

80% of the universe is burning. Look at the starts mister.
And i hate it when questions like "does alien life exist" and "do other universes exist" are asked. With billions of glaxies out there, is there any possibility that they do not?

Varun Khetarpal said...

::May I ask you what do you mean by "Look at the starts" ?::

Its gud that you commented because it showed the dearth of ur knowledge abt the universe.

By saying that why the universe isn't burning meant that the "SPACE" between the heavenly bodies is cold.Heard about "The Big Freeze" theory ? It a scenario in which the universe simply becomes too cold to sustain life due to continued expansion. The Big Freeze is a theory of a possible fate of the universe.Understand things !

::You hate it when question like "does alien life exist" is asked.::

Extraterrestrial life MAY exist. Its existence is currently HYPOTHETICAL; there is as yet NO evidence of extraterrestrial life that has been WIDELY accepted by scientists.Read about Panspermia.

::You hate when question like "do other universes exist" are asked::

Saying that "With billions of glaxies out there, is there any possibility that they do not?" is highly ignorant way of expressing thoughts.Read the last line of the entry again.

Hope this disillusions ur mind from myths and confusions.

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.
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