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How Big Is The Universe ?

how big is the universe

The Proper observable distance of Universe from Earth to the edge of universe is 46 Billion Light-Years (14 Billion parsecs). 

Let’s Know This Universe In Increasing order.
1) Planets
There are 8 Planets in our solar system, Our Earth is one of them.

2) Solar System
Every Solar system have Many Planets which Revolves around a Star.
scientists estimate that there may be 100 billion of solar systems in our galaxy.

3) Star
Sun is also A Star, Other Stars can be larger or smaller than Sun. 
In the night we see stars, these Stars Looks Like Very tiny Because of Huge distance from earth.
Our Nearest Star is Proxima Centauri which is 4.25 Light Year away from the Earth. 

4) Galaxy 
There are about 2 Trillion Galaxies in the observable universe.
It is a Huge Collection of Gas, Dust, and Billions(200 to 400 Billions) of Stars.
Our Galaxy is a Milky Way  Galaxy, Which also has a Super massive Black Hole in the middle.

5) Cluster
One Cluster have Several Hundred Galaxies. Our Cluster name is Virgo Cluster.

(6) Super Cluster
It is a Cluster of clusters, They can have 2 to 4 clusters are common.
Recently Indian Scientists Discover Largest Super Cluster (Saraswati Super Cluster) which has 42 Cluster. Our Super cluster name is Laniakea Supercluster.

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How Do We Measure Distance In Space

how do measure distance in space

To measure distances in the Universe,  Astronomers use different methods to determine the distances to objects. The specific method which is used depends on how far away the object is.

Various Common Measuring Methods 

1) Radar
This method is use to determine distances in our solar system.

2) Parallax
This method is use to measuring distances to nearby stars. But cannot measure stars more than about 100 light-years from Earth.

3) Cepheids
Measuring distances in our Galaxy and to nearby galaxies. This method works up to 13 million light-years from the earth.

4) Supernovae
Measuring distances to other galaxies. This method works up to about 1 billion light-years.

5) Redshift and Hubble’s Law
This method is use for very far objects (beyond about 1 billion light-years)


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one light year distance in km and miles

Light year is a Astronomical unit which is used to measure distance in space, measure in KM/Miles

ONE LIGHT YEAR (Distance) = 10 Trillion KiloMetre (A light travel in One Year)

Light Speed = 299,792,458  metre / second.  (Approx 3 Lakh KiloMetre Per second)

Light Travel = (Speed of Light) x (Time)

Light Travel (in One hours) =   1,079,252,848,800 Metre (Approx  107 Crore Kilometre / 1.07 Billion KM)

 (in 24 hours / in one day) = 25,902,068,370,000 Metre (Approx 2600 Crore KiloMetre / 25.9 Billion KM)

 (In 365 days / In a Year ) = 9,454,254,955,000,000 Metre (Approx 10 Lakh Crore KiloMetre / 10 Trillion KM)


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