HELLO GUYS, I will be explaining to you how we know what the stars are made of. Each Star Produces its own individual light. By splitting the light in a spectrum, astronomers can discover the chemical elements in the star’s atmosphere absorb light of different wavelengths. Sodium atoms, for example, only absorb light from the yellow part of the spectrum, called an absorption line, tells scientists that there is sodium in the star. By studying the various lines made on the spectrum, scientists can determine what the star is made up of.
Hello Guys, Below, I will be describing to you how the Universe was created. Although nobody can be sure how the Universe began, most scientist believe that it was born from an enormous explosion 13 billion years ago. This explosion, called the “ Big Bang ”, was the point where space and time come into existence and all the matter in the cosmos started to expand. Before the Big Bang , everything in the Universe was compressed into a minuscule are a no bigger area than the nucleus of an atom. The Big Bang was an unimaginably violet explosion that sent particles flying in every direction. A process called cosmic inflation caused the Universe to expand into an area bigger than the entire Milky Way in less than one second. Moments later, the temperature began to decrease, and the Universe began to settle down. Stars and galaxies began to form roughly one billion years after the Big Bang .
The passion for the motor car turned into racing and by the end of 19 th century the first racing car competitions had begun. To begin with, there were no limits or rules as to the types of cars taking part in different races, and the competition was open to almost any method of transport on four wheels. Then from 1906, the competition was divided into two major groups of ‘formula cars’, both of which were free to experiment with technical improvements to make the car perform better. The first group were the course formula cars , with specifications as to the number of engine cylinders, fuel consumption and the size of the car. The second group were the free group which had no specification limits. Formula 1 racing began in 1946, and from the time it was officially establish in 1950, it was destined to become the most famous racing car competition in the world. Formula 1 began as a raci...
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