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Some Interesting Facts About Universe

Updated on September 29, 2017

Astronomy is a very interesting and mysterious part of science. Most of the studies in this subject are mainly about celestial bodies lie at very long distances, which could not be easily learned and imagined by human beings, .There are many theories in astronomy. Big Bang theory is very important which tells how the Universe came to form.

According to Big Bang theory, billions of years ago all the matters including our sun, planets and other countless number of solar systems and energy of the observable Universe were concentrated at one point with infinite density. Big Bang theory tells, the Universe emerged and expanded from that extremely dense and hot state and continues to expand even today. It is also believed that space it self still expands with its galaxies.

In Astronomy, the Universe is defined as every thing that physically exists. It includes galaxies, billions of solar systems and stars. Still there are many mysterious things existing even in our solar system. But our solar system is relatively very small thing when we compare it with the size of the Universe. Astronomers say that Universe is about 13.8 billion years old and at least 93 billion light years across. 1 light year means the distance that can be traveled by light continuously for the time period of one year. The light travels in the space at a speed of 3 lac km/second. So, we can't even imagine the distance that traveled by light continuously just for one year. Then how can we imagine the distance between the ends of Universe ?

After the Big Bang, the Universe started to expand until its present form. According to general science physical matter can never exceed the speed of light. But in the Big Bang theory it is stated that two galaxies have been separated by 93 billion light years in 13 billion years. However, the separation is a natural consequence of general relativity by which it is understood that space can grow with no intrinsic limit on its rate; thus, two galaxies can separate more quickly than the speed of light if the space between them grows.

The Great Universe is made of many millions of Galaxies. Galaxies are groups of billions of stars that are held together by the force of gravity. Most of the galaxies are either spiral or elliptical and some of them also in irregular shape.

The Milky Way, The Large Megallanic Cloud, Abell 2029, The Sagittarius Dwarf, Andromeda, Abell 135 IR 1916 are some of the galaxies of the Universe.

The Milky Way

This is our own galaxy where our solar system exists. The word galaxy means milk in Greek language. Before the use of astronomical telescopes the galaxies looked like a milky or cloudy area in the sky and called so. Our relatively small solar system is one of 100 - 200 billion stars found in the Milky Way. The diameter of the Milky Way is 1 lac light years. The sun and all the planets in our solar system take about 200 million years to complete one orbit around its center.

The Large Megallinic Cloud

This is the brightest of all galaxies and visible only in southern hemisphere. It is about 1.7 lacs light years away from our earth and its diameter is 39,000 light years.

Abell 2029

This is the largest galaxy of the Universe with the diameter of 5.6 million light years which is 80 times greater than Milky Way Galaxy. It is about 1,070 million light years away from our earth.

The Sagittarius Dwarf

It was discovered in the year 1994 and is the nearest of all galaxies. It locates at about 70,000 light years away from our earth.

Andromeda Galaxy

This is one the most distant systems in the Universe and also can be seen with naked eye. This is 2,309,000 light years from earth. It contains about 300 billion stars and diameter of 180,000 light years. It is an incredible fact that light we see now from Anderomeda could have left from there just after the first humans appeared on our earth.

Abell 135 IR 1916

This is the most distant galaxy of our universe. It exists amazingly 13.2 billion light years away from the earth. In 2004 astronomers at the European Southern Observatory announced the discovery of this Galaxy.

The Universe Calendar

After the Big Bang there were many astronomical and earth events happened including birth and disaster of dinosaurs. All these things have happened in a huge period of time which could not be easily understood by the human brain. The American astronomer Carl Sagan ( 1934-96 ) first suggested a 'cosmic calendar' as a way of helping people understand the history of Universe. He put every event in to the scale of calendar of human year.

In that calendar our Milky Way forms on the first day of May and our earth appears on 12th September and Moon on 13 th September. All human history is crowded into the last five minutes of the last day of the calendar. Recent time in this current world has to be divided into seconds and fraction of second of the Universe Calendar. So every thing that happened in the last 500 years takes place less than the last second of the last minute of the Universe Calendar. Let us watch the events of Universe Calendar.

Date / Time, Event

1 Jan ( mid-night ), Big Bang - Universe forms

15 March, First stars and galaxies form

1 May, Milky Way galaxy forms

8 Sep, Sun forms

9 Sep, Solar system forms

12 Sep, Earth forms

13 Sep, Moon forms

20 Sep, Earth atmoshere forms

1 Oct, Earliest known life on earth

7 Oct, Earliest known fossile

18 Dec, First many celled life forms

19 Dec, First fish

21 Dec, First land plants ; first insects

23 Dec, First reptiles

24 Dec, First Dinosaur

26 Dec, First mammal

27 Dec, First bird

28 Dec, First flowering plant

28 Dec, Dinosaurs extinct

31 Dec ( 11 : 55 PM ), Homo sapiens ( modern human ) appears



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  • Ryan-Palmsy profile image

    Ryan Palmer 6 years ago from In a Galaxy far, far away

    very interesting :)

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    swetha 6 years ago

    very nic.......... it gives a lot of information about universe.

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    susmita malla 6 years ago

    i like this

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    shelllybelly 7 years ago

    very interesting but long thanks for your help

  • profile image

    VIGNESH 7 years ago


  • profile image

    naren 7 years ago

    really useful facts and unimaginary

  • profile image

    Lweinberg 7 years ago

    Good hub, but Einstein said 'nothing can accelerate beyond the speed of light', which leaves it to imagine some things could travel at that speed or faster. It's hard to keep track of all the new theories- they come out every second. Some astronomers think the Theory of Relativity needs adjustment, and it probably does. Einstein was a genius not a god! Great Hub!

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    abhishek kumar 7 years ago

    not at all facts .these are strange facts,and i dont think all could gather such facts

  • profile image

    manisha 7 years ago

    this is really a awesome information about universe always i look forward for this kind of information

  • profile image

    viji 7 years ago

    wow! amazing facts

  • profile image

    Hannah Montana 7 years ago

    OOo god

  • ratnaveera profile image

    ratnaveera 7 years ago from Cumbum

    Dear rafken, Thanks for allotting your time for reading this hub and adding your valuable comments.

  • rafken profile image

    rafken 7 years ago from The worlds my oyster

    Very good hub. A joy to read. Only a few seconds into our life in the universe and we can already reach other planets in our solar system. Maybe their is hope for us to reach other stars.

  • profile image

    Abhishek 7 years ago

    About light

  • profile image

    the truth 7 years ago

    so all the animals popped out of nothing

  • profile image

    Abhay Pratap Singh  7 years ago

    Thank u,for making such article it tells much about our universe.

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    chankey biswas 7 years ago

    thank you for your good information.this great effort of you helps any ordinary people to learn about the rulls of universe.

  • profile image

    dinesh  7 years ago


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    nikrulz1106 7 years ago

    bumped into an INSANELY INTERESTING WEIRD FACTS SITE and it simply kicks ass

  • profile image

    MANOJ BHATT 7 years ago

    Interesting information and knowledge about the universe, I like its very much.this is very useful and very interesting to know such facts.

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    Scott Zuckerman 7 years ago

    The Universe is 95% controlled by what scientists refer to as Dark Matter.

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    vishnu 7 years ago

    this is very useful and very interesting to know such facts.........

  • profile image

    nana 7 years ago

    It is suprissing to hear about the origin of human existance

  • profile image

    Amol 7 years ago

    Giving an not ordinary information. Thanks a like univers.keep giving an extraordinary information.

  • profile image

    donthi raja bharath 8 years ago

    gud information abt universe

  • profile image

    prakrit 8 years ago

    facts about the unreachable sucpense STILL DOUBTFUL

  • profile image

    rs 8 years ago

    I like this knowlage about universe.

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    kedar patil 8 years ago

    ggve som mre infrmtin abut it

  • profile image

    Marina 8 years ago

    It is very interesting.....SMILE

  • ratnaveera profile image

    ratnaveera 8 years ago from Cumbum

    Dear Friends freddyjones2009 and KenWu , Thanks for visiting this Hub and putting your nice comments.

  • KenWu profile image

    KenWu 8 years ago from Malaysia

    Thanks for sharing this info. It's very interesting. The universe is so big that we do not know what is at the other side of the world.

  • freddyjones2009 profile image

    freddyjones2009 8 years ago

    An interesting hub. Solid info. Thanks

  • ratnaveera profile image

    ratnaveera 8 years ago from Cumbum

    Dear friend, Thanks for coming here and your interest on Astronomy. Universe is such a great thing as we can not easily feel how great it is. Even we can not imagine the distance between the Uranus and Sun where light covers in just 3 to 4 hrs. Then, How can we imagine a distance of 93 billion light years.

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    gafar 8 years ago

    please my friend give me a few words about universe.

  • ratnaveera profile image

    ratnaveera 8 years ago from Cumbum

    Dear prasetio30, Thanks for coming here and happy to know that you have got more interest on universe after reading this hub.

  • prasetio30 profile image

    prasetio30 8 years ago from malang-indonesia

    thanks for great opinion about the universe. It open my eyes to learn deep about universe.

  • ratnaveera profile image

    ratnaveera 8 years ago from Cumbum

    Dear Jain, Thanks for visiting this hub and your nice comments.

  • prasadjain profile image

    Dr.S.P.PADMA PRASAD 8 years ago from Tumkur

    Good article with good pictures. It has nice links too.

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    manya 8 years ago

    awsom stuff, never knew that much

  • ratnaveera profile image

    ratnaveera 8 years ago from Cumbum

    Dear jxb 7076, Thank you very much for your nice comments!

  • jxb7076 profile image

    James Brown 9 years ago from United States of America

    Excellent HUB on universal matter in space. Thanks for sharing.

  • jxb7076 profile image

    James Brown 9 years ago from United States of America

    Excellent HUB on universal matter in space. Thanks for sharing.

  • hubber-2009 profile image

    hubber-2009 9 years ago from India

    The universe likely did not exist at one time and eventually,in the future it will go out of existence.

  • ratnaveera profile image

    ratnaveera 9 years ago from Cumbum

    Dear Trsmd, Thank you for your nice comments.

  • Trsmd profile image

    Trsmd 9 years ago from India

    very good information about the Universe..