Skip to main content

Universe



Universe 
The mysteries of the sky, the cycles of the Sun, Moon and the stars have evoked immense feelings of wonder  and awe in Man's mind from prehistoric times, giving birth to countless myths and beliefs. The first step towards understanding the Universe is to know about the solar system, the family to which we all belong. It comprises of the Sun and the eight planets that go around it.

How did the Universe originate?
There are various theory that tells about the originating of Universe. In which two theories are more popular. They are Big Bang Theory and Steady State Theory.
      According to the 'Big Bang' Theory, the Universe is the result of an explosion called the Big Bang. This explosion occurred about 14 billion years ago. When the Big Bang happened, it loose a huge amount of energy. This energy keeps the Universe expanding. This expansion is likely to continue for another 50 billion years.
    The British Scientists Fred Hoyle, Hermann Bondi and Thomas Gold, in 1948, put forward the Steady State Theory. According to this theory, the Universe is uniform, throughout both time and space, and had no 'beginning'. Since this theory had no answer to many phenomena found in Universe, it gradually lost.

What does the Universe consists of ?
The Universe is so vast that it contains everything. The Universe consists of all galaxies, the stars, the Sun, the Earth  and everything that exists in limitless space. The size of the Universe is beyond human imagination. There may be distant worlds in the Universe about which we know nothing. Even every empty space is a part of the Universe, and so are matter, time, and energy.

What do we understand about the birth of the Universe ?
The vast Universe was once smaller than atom.This tightly packed particle exploded, and from it came all the material of which the Universe is made.Once the Big Bang occurred, the Universe began stretching like the rubber skin of a huge balloon. Space and time began to expand at an incredible rate. This phenomenon is called inflation of space. At the end of the rapid inflation, the Universe became cooler, and the particles that make up matter began to form out of some of the energy. The gas and dust formed after the explosion, condensed into galaxies, that are speeding away from each other.

What is a light year ?
A light year is not a measure of time. It is a measure of distance, Stars and planets are so far away that distance in kilometres, the number would be enormous. So, these huge distances are measured in 'light years'. Light travels at a speed of 2,99,792.458 km/sec. 
1 light year = 9,460,000,000,000 km.
Proxima Centurai, our nearest star, next to Sun is 4.2 light years away from us.


Comments

  1. Rishi GoyalNovember 8, 2020 at 1:26 AM

    Can you tell more about universe,like-mysterious things in the universe

    ReplyDelete

Post a Comment

Popular posts from this blog

WORLD  HERITAGE  SITES IN  INDIA PART- 1  Why did UNESCO start the World Heritage Centre? The UNESCO World Heritage Centre was born by merging two separate movements. The first was a movement for the preservation of cultural sites. The second was a movement that dealt with the conservation of nature. The ball for the first movement was set rolling with the decision to build the Aswan High Dam in Egypt. This dam would have flooded the valley in which one of the treasures of ancient Egypt- the Abu Simbel temple- wsa located. In 1959 UNESCO launched a campaign to safeguard these temples. It was a joint effort of 50 countries, and it led to many other similar projects to safeguard rare treasures. It was the United States that led the movement to combine the conservation of natural wonders along with cultural sites.  World Heritage Fund- If 1972, the World Heritage Fund was created. Its aim is to assist nations in identifying, preserving, and promoting World Heritage...
Post a Comment
Read more

Square of the number

     This article is used to find out the square of  a number in a short period of time compare to normal maths. It increase the speed of your calculations.  The answer obtained by multiplying a number by itself is the square of that number. Example :- 6×6= 36 which is the square of 6.                          8×8= 64 which is the square of 8.      1.   Square of numbers ending in 5 :- Example 1-: 35 2 =   ? Step 1:- Multiply the first part by the first part plus 1: 3 ×(3+1) =3×4 =12 Step 2:- Write the number 25 next to the result from step 1: 35 2 = 12_25 = 1225 Example 2-: (in 3 digits) 125 2 =   ? Step 1:- Multiply the first part by the first part plus 1: 12 ×(12+1) =12×13 =156 Step 2:- Write the number 25 next to the result from step 1: 125 2 = 156_25 = 15625 Example 3-: (in decimal numbers) 9.5 2 =     ? Step 1:- M...
Post a Comment
Read more

What is Genetics

What is Genetics?     Have you ever wondered why some people are short while others are tall, or why some have brown eyes while others have black eyes? Genetics is the study of the ways in which different characteristics are passed from each generations of living things to the next. Genetics has many divisions like population genetics and epigenetics   What is DNA?     Each of us has a unique set of chemical blueprints that determine how our body looks and functions. These blueprints are contained in our DNA, which is the short form of deoxyribonucleic acid.    DNA is in the form of long spiral-shaped molecules found inside every cell. The instructions for constructing and maintaining cells are built into this molecule. DNA can copy itself so that all the new cells produced by a plant or animal, contain copies of the same set of genetic instructions, or genetic code. Every single living organism processes DNA. In fact, DNA defin...
Post a Comment
Read more