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

Rules of divisibility part -1

Rules of divisibility In Vedic mathematics, it can be determined whether any part of any other number can be given completely without dividing it by several methods. These methods are based on the law of divisibility. By using these rules, calculations related to factors, parts etc. are simplified. Law of divisibility by number 2 :- If unit digit of given number is divisible by 2 then the given number is divisible by 2 also.                                                                 or  If unit digit of given number is 0,2,4,6 or 8 , then given number is divisible by 2. Example :- 10 ,32 ,74 ,108 ,2058 etc. Law of divisibility by number 3 :- If the sum of digits of given number is divisible by 3, then the number is divisible by 3 also. Illustration 1:-  In 546532 sum of digits=5+4+6+5+3+2=25 25 is not divisible...
2 comments
Read more

Octal and Hexadecimal Number

Complement of a Number    Types of Number system    Convert Decimal to Binary If you are new to this article, I strongly recommend to read our previous article before preceding this. In our previous article, we had already seen that binary number has a base of 2. It means that binary number contains 2 1 = 2 combinations which are 0 and 1. Similarly, Octal and Hexadecimal number has a fixed number of combinations. As we earlier know that octal has a base 8, then it contains 8 digits through 0 to 7 which means 2 3 =8 combinations and Hexadecimal has a base 16 which means it has 2 4 =16 combinations.                 If you are focusing on a sequence i.e. octal, hexadecimal. They are the combinations of increasing power of 2. Octal – 2 3 , Hexadecimal - 2 4 This power indicates how many bits are in a number for a particular number system Octal has 3 bits Hexadecimal has 4 bits T...
Post a Comment
Read more

mathematics skills

Are you ready to give your mathematics skills a boost? These simple math tricks can help you perform calculations more quickly and easily. They also come in handy if you want to impress your teacher, parents, or friends. 01 The Answer Is 2 Think of a number. Multiply it by 3. Add 6. Divide this number by 3. Subtract the number from Step 1 from the answer in Step 4. The answer is 2. Same Three-Digit Number Think of any three-digit number in which each of the digits is the same. Examples include 333, 666, 777, and 999. Add up the digits. Divide  the three-digit number by the answer in Step 2. The answer is 37. Six Digits Become Three Take any three-digit number and write it twice to make a six-digit number. Examples include 371371 or 552552. Divide the number by 7. Divide it by 11. Divide it by 13. The order in which you do the division is unimportant! The answer is the three-digit number. Examples: 371371 gives you 371 or 552552 gives you 552. A related trick is to take any three-di...
Post a Comment
Read more