THRUSTING SEVEN SEAS INTO A GRAIN OF SALT

Our sun is a ball of fire. Its flares are extending to thousands of kilometers. It is in the middle life and produces such a enormous energy. It is a small star and all the stars are similar to our sun.

When a star is living it produces light and heat energy through nuclear fusion. That is, by combining hydrogen atoms into helium atoms. When the star runs out of the nuclear fuel, it will die. During the death of a big star, its outer shell will blast off with such a brightness that it will be visible throughout the galaxy even in daytime. This phenomenon is called 'supernova'. Next, star's inner core will get compressed due to gravity. That is, star will collapse under its own weight. It will collapse into a mathematical point called "gravitational singularity". All the mass is concentrated in that point. Hence it will have zero volume, infinite density and enormous gravity.

The influence or the gravitational field of the singularity will extend to certain radius or to a certain circular area around the point mass. The boundary of that area is called 'event horizon'. Anything, even light that reaches event horizon will be sucked in by huge gravity and will never return. This dead star is called "black hole". No light returns, so it is black. Everything falls inside, so it is a hole.

A star with the mass of our sun may become a black hole of 3 km radius. A star with the mass of earth may become palm sized black hole{hypothetical}. Our sun will never become a black hole because it is a small star.

At the center of our milky way galaxy, there is a super massive black hole with the mass of 4 million suns. Our universe is born from such a singularity.

If you read somewhere that a mountain can be converted into an ant, it may not be a 'cock and bull' story.

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THE EARTH, A SUPER ORGANISM

JOIN MY COURSE: "Become a programmer in a day with python" A man called 'love lock' (what a name) proposed a theory called Gaia theory, named after Greek Goddess. It says, "Earth is a self-regulating organism like a human being. The organic life in it interacts with in-organic matter and maintains atmosphere, temperature and environment". Hence the earth is still suitable for the life to thrive. Imagine, in a particular place, there are lot of flowers. Some flowers are white and some are darkly coloured. We know, white reflects light and heat while dark absorbs the same. White flowers can thrive in hot climate. But dark flowers requires cold climate. The absorption and reflection balances and the environment reaches average, warm temperature at which both the flowers can co-exist. This is the essence of "Gaia" theory. On our earth, the oxygen constitute 20% of the atmosphere. The oxygen level is always mai

THE PARABOLA

A jet of water shooting from a hose pipe will follow a parabolic path. What is the so special about parabola. Y= x^2 Draw a graph for the above equation. It will result in a parabola. This parabola is also called unit parabola. Any equation involving square will yield a parabola. Example: Y = 2x^2 +3x+3 (also called quadratic equation) X= 2 and -2, both satisfies the equation 4 = X^2. Parabolic equations always have two solutions. Any motion taking place freely under gravity follows parabolic path. Examples: An object dropped from a moving train, A bomb dropped from flying plane, A ball kicked upwards. If a beam of light rays fall on the parabolic shaped mirror, they will be reflected and brought to focus on a point. This fact is made use of in Dish Antenna, Telescope mirrors, etc. Inverted parabola shape is used in the construction of buildings and bridges. Because the shape is able to bear more weight. A plane

DISORDER IS THE "ORDER OF THE DAY"

Imagine a balloon full of air. The air molecules are moving randomly inside the balloon. Let us pierce the balloon with a pin. The air rushes out. Why should not the air molecules stay inside the balloon safely and ignore the little hole? That is not the way the world works. The molecules always "want to occupy as many states as possible". Hence the air goes out in the open to occupy more volume. The things always goes into disorder (entropy) and the disorder increases with time. The above statement is what we call "second law of thermodynamics". Consider a cup of coffee on the table. Suppose the heat from entire room flows to your cup of coffee, the coffee will boil and the rest of the room will freeze. Freezing means bringing things to order and arrangement. It violates the second law. Hence it will never happen. Hence heat must flow from high temperature to low temperature and not the other way. The air molecules in y

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