Where We Are

Where ? We WE ARE ALLare… KNOW THAT WE ARE LIVE IN THE EARTH AND THE EARTH BELONGS TO THE SOLAR FAMILY ……… NO ONE KNOW THAT WERE THE SOLAR FAMILY IS . WE WILL DISCUSS ABOUT WHERE IT IS., AND HOW IT FORMED BASED ON VARIOUS THEORY ABOUT ORGIN OF SPACE. G.RAJA

Designed By:

UNIVERSE NO ONE KNOW HOW BIG THE UNIVERSE

IS. IT IS VERY VERY ………BIG. UNIVERE CONSIST OF EVERY THING THAT EXIST…… …

UNIVERSE IS STILL EXPANDING ………

IT IS ESTIMATED THAT THERE ARE MORE THAN 1000 BILLION GALIXES AND EACH CONTAIN MORE THAN 100 BILLION STARS.

THE BACK GROUND PITCHERS SHOWS THE PICTURE OF THE UNIVERSE …

Each light shows the picture of galaxies not stars.

Various theory’s:

Big bang theory, Steady state theory, Pulsating theory (or) oscillation theory.

BIG BANG THEORY THE MOST ACCEPTED THEORY ABOUT THE ORGIN OF UNIVERSE IS BIG BANG THEORY THE SIZE OF THE UNIVERSE IS INITIALY 10⁻⁵⁰cm radius. THE UNIVERSE INITIALLY CONSIST OF A VERY HOT,DENSE FIREBALL OF EXPANDING, COLLING GAS. UNIVERSE CAME INTO BEGAIN IN A HUGE EXPLOSION-BIG BANG-THAT TOOKS PLACE BETWEEN 10 TO 20 BILLION YEARS AGO. AT THAT TIME OF BIG BANG THE TEMPERATURE IS 10³² °c

ONE SECOND AFTER THE BIG BANG: “When things expand they cool.” Temperature is dropped to 1000 crore degrees. The particals that make Atoms protons, neutrons and electrons are formed.

THEFIRST FIRST TWO MINUTES AFTER THE TWO MINUTES AFTER BIG BANG: THETHE BIG BANG:

The universe kept expanding. The temperature down’s to 100 crore degrees. Proton’s and neutron’s are combined to form the atomic nuclei of hydrogen, helium, and lithium. “All the atomic nuclei of the universe was formed in few minutes.”

STILL A TOM WAS NO T

AFTER 8 LAKH YEAR’S FROM BIG BANG: The universe kept expanding and cooling. The temperature was reduced to 3000 degree This was now cool enough for the electron’s to stick to the nuclei and form atoms. The universe at last has its first atoms. Mostly atom’s of hydrogen and some helium with little lithium here and there… At this time only light is introduced in the universe.

AFTER 30 CRORE YEAR’S FROM BIG BANG: Proto galaxies are formed which doesn’t contain stars. AFTER 500 CRORE YEAR’S FROM BIG BANG: The first star was formed by nuclear fusion reaction. AFTER 700 CRORE YEAR’S FROM The first generation stars are BIG BANG: die. AFTER 1000 CRORE YEAR’S FROM BIG BANG: Second generation stars and our sun are formed.

After the death of first generation stars the atom’s like carbon, oxygen and iron are formed since due to supernova position of the star’s. since the life can exist in 2nd generation…

S IE AX

AL

GALAXY IS NOTHING BUT IT IS A GROUP OF STARS.

G

GALAXY ALSO CONTAINS PLANET’S AND THEIR SATILLITE’S , BLACK HOLE’S, ASTEROIDS COMETS, ETC.., OUR GALAXY NAME IS “MILKY WAY GALAXY” OUR NEARER BY GALAXY IS “ANDROMEDA “ GALAXY WHICH IS OF DISTANCE MILLION LIGHT YEARS.

2.2

Types of galaxy’s: Elliptical galaxy’s Spiral galaxy’s Irregular galaxy’s god eye galaxy’s , etc…, ( This name’s are given based on the shape )

Spiral galaxy

Irregular galaxy

Elliptical galaxy

God eye galaxy

pinwheal galaxy

l o o p l

r i h w y x a l a g A D E

D N A

M O R

y x a l ga

Core (or) Central bulge Nucleus

MILKY WAY GALAXY Crux-centaurus arm

Perseus arm

LOCATION OF SOLAR SYSTEM

Sagittarius arm

n

io r O

m

ar

Formation of stars: Nebula is the first stage. a

l u b

ula b e n n o i s s i Em

e k a

ne

Sn

la u b

or

se

h

d a e

a

l u b

ne

m

ed

ne

The stars are mainly classified into

massive stars . small stars.

Massive stars: The size of the stars is 3 times the sun and some stars are about 50 times the sun. The life of the stars are less when compared to small stars.

After a few hundred thousand years the proto stars are formed.

After 10 million years the main sequence star’s are formed.( dia=3million km)

Small stars: The size of the stars is less then 1.5 times the sun. Life time of small stars are high. Our sun is small star.

After 50million years the proto stars are formed.

After 10 billion years the main sequence star’s are formd.( dia=1.4million km)

Death of stars: The massive stars after 10 million years RED SUPER GAINT,(4 million) and then SUPERNOVA( 1-2 years) BLACK HOLE(OR) NEUTRON STAR The small stars after 10 billion years RED GAINT, (100 million)And then PLANETARY NEBULA,( 35000 years) WHITE DWARF, COLLING WHITE DWARF, BLACK DWARF.

SUPERNOVA POSITION

SUPERNOVA POSITION

Very bright supernova

upe s e Blu r sta

nt i a rg

Accretion disc

t h ig a r b ov y rn r e e

Core

Core

Star

↓

Accretion disc

↓ K C A L B

H

E L O

COME Comets are debrisTS remaining from nebula. Comets are made of frozen gases and dust. Comets are few kilometers in diameter. Comets orbit the stars in elliptical path.

Cr em us ga i t s ttin wi an g th d je ac du ts ti st o ve f

Nucle us

Jet of gas and Ices including water ice, and frozen carbon-dioxide methane, and

Possible core of silicate dust.

Broad dust tail curved along comet’s orbital path.

ASTEROIDS AND ASTEROIDS and METEOROIDS are also debris METEOROIDS from the nebula. The size of them is varied. Size of ASTEROIDS 1000 KILOMETERS.

Size of METEOROIDS less then 1000 KILOMETERS.

Queries…. Thank you for the Opportunity

? Any Doubts