We have one Universe.
The Universe is an open universe and it is ever expanding. Universe is everything.
We have 10,000 billion galaxies in our Universe.
We belong to a galaxy called Milky Way.
Milky Way has 10,000 million stars.
Sun is one of the stars. Sun and its planets together constitute solar system.
Sun has eight Planets. (Recently Pluto is removed from planet status).
Earth is one of the planets.
Universe is formed out of a sudden explosion; this is explained in Bing bang theory.
A prototype of big bang theory experiment is done is Switzerland in 2008. Only 5% of the experiment is successful.
Our Universe is 15 billion years old.
Our galaxy MILIKY WAY is 10billion years old. It is spiral in shape. ANDROVEDA is the nearest galaxy to Milky Way.
Sun is 5billion years old. The color of SUN is Yellow and it is a Youth Star. PROXIMA CENTAURI is the next closest star to earth after sun.
Speed of Rotation of earth --- 1690Km/hr.
Speed of Rotation of sun --- 25Days
Speed of Revolution of earth --- 105000Km/hr.
Speed of Revolution of Sun --- 250km/sec.
Earth takes 365days and 6Hours to revolve a round the Earth.
Sun takes 250-260 Million Years to revolve around the Spiral path of our Milky Way galaxy. This is called one cosmic year.
The distance between Sun and Earth is 150Million KM. It is called 1A.U (Astronomical Unit).
Light travels at 300000KM/Sec. The length of light travelled in one year is called one light year.
PROXIMA CENTAURI is 4.2 light years away from the earth.
Epsilon Aoruge is the 2000times bigger than sun. This is the biggest star in our galaxy.
Serious is 24times brighter than sun. This is the brightest star in our galaxy.
Star is self luminous body which emits light and heat.
Stars are formed due to gravitational contraction of gravity dust particles. It takes 4-5 million years to form a star. Sun is a dust particle
Stars live for 1-50 billion years.
There are three types of stars.
Young – blue color
Youth – yellow color
Old – red color.
Sun will live for 5 billion years more.
Stars can die in the following forms.
White Dwarf.
Super Nova.
Black Hole.
Diameter of MOON is 3470KM. (Moon is a natural Satellite of Earth).
Diameter of Earth is 12756KM.
Diameter of Sun is 13Lakh 65000KM.
IMAGINE THE PICTURE OF UNIVERSE AND IT PARTICLES.
