Struggling with Meaninglessness

searching meaning in meaninglessness

General Theory of Relativity

with 2 comments

In my previous post, i mentioned about Einstein’s theory of how planets orbit around the sun. Contrary to popular belief, no , the sun does not directly pull the planets around with gravity. Rather, it was caused by the curvature of space-time fabric . Have a look at the diagram below to get the idea.

space (pic credit: nasa.gov)

Planets move around the sun based on the curve formed by the sun. Basically, the sun keeps ‘spiraling’ to create this effect. It is a pretty similar situation when you use a teaspoon to stir your cup of coffee. Put some small ice-cubes in to cup, gently stir the drink and you will see the effect right under your nose. This is the phenomenon which causes earth together with other planets to constantly stay within the orbit, not moving away from sun and obediently orbiting around it.

Notice that the satellite in the image is shooting a beam towards the earth. What it tried to depict here is that even light and radio-wave movements are influenced by the space curvature. They have to move along it.

Now another question. What caused the planet to keep orbiting and moving on and on eternally? What caused the sun to keep on rotating eternally hence creating the spiral effect? I will answer that in the next post.

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Written by elan85

November 16, 2007 at 6:44 pm

Posted in Astrophysics

2 Responses

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  1. does the sun move?

    sophie

    February 10, 2008 at 3:17 am

  2. Hie sophie.

    Yes, the sun does rotate 360 degrees just like the earth do.

    And yes, the sun does move around the blackhole. I will give you the picture –

    The moon moves around the earth. The earth together with seven other planets moves around the sun. And the sun together with the eight planets, called as the solar system, moves around the blackhole in the center of our Milky way galaxy.

    elan85

    February 11, 2008 at 3:45 pm


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