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1071360000 k.m.

1071360000 k.m.

1785600 KM.

1785600 km.

297600 KM .

297600 km .

9.46 LAKH CRORES KM.

9.46 lakh crores km.

As the distance between heavenly bodies is very LARGE, the unit used to MEASURE the distance is the distance TRAVELLED by light in one YEAR.

As the distance between heavenly bodies is very large, the unit used to measure the distance is the distance travelled by light in one year.

PROXIMA Centauri .

Proxima Centauri .

A star that exposess catastrophically DUE to instabilities following the exhaustion of its NUCLEAR FUEL, BECOMING for a few days up to one hundred million times brighter than the sun.

A star that exposess catastrophically due to instabilities following the exhaustion of its nuclear fuel, becoming for a few days up to one hundred million times brighter than the sun.

Tycho Brahe. 

Tycho Brahe. 

SHOEMAKER LEVI in 1996.

Shoemaker Levi in 1996.

HOLMES COMET is the LARGEST comet.

Holmes comet is the largest comet.

Halley’s comet is the most FAMOUS comet which reaches the SOLAR SYTEM in every 76.1 YEARS.

Halley’s comet is the most famous comet which reaches the solar sytem in every 76.1 years.

Comets are stars with TAILS. The WORD COMET is derived from the GREEK word “ Kome ” MEANING “ long haired star ”. The long hair is a tail of the comet which looks like hair. The head of the comet is the star.

Comets are stars with tails. The word comet is derived from the greek word “ Kome ” meaning “ long haired star ”. The long hair is a tail of the comet which looks like hair. The head of the comet is the star.

IRREGULAR NEBULAE which EMANATE RADIATION WAVES. 

Irregular nebulae which emanate radiation waves. 

They are the COSMIC cloud DUST REFLECTING STELLAR LIGHT.

They are the cosmic cloud dust reflecting stellar light.

Hublind and toury .

Hublind and toury .

It will not be POSSIBLE to see the STARS shinning in some DARK regions of the sky. The nebulae occuring in these regions are known as NON - LUMINOUS irregular nebulae.

It will not be possible to see the stars shinning in some dark regions of the sky. The nebulae occuring in these regions are known as non - luminous irregular nebulae.

They are luminous irregular CLOUDY PATCHES APPEARING in the sky.

They are luminous irregular cloudy patches appearing in the sky.

CHARLES Medier, W. Herschel, R. Milkovsky, L.H. ALLEN Barman and Van Manner. 

Charles Medier, W. Herschel, R. Milkovsky, L.H. Allen Barman and Van Manner. 

Orion.

Orion.

By NUCLEAR FUSION.

By nuclear fusion.

The dust CLOUDS in outer space are CALLED nebulae. They are vast and distant. NORMALLY they are COMPOSED of dust ( about 2 % ), hydrogen and other elements found in stars..

The dust clouds in outer space are called nebulae. They are vast and distant. Normally they are composed of dust ( about 2 % ), hydrogen and other elements found in stars..

They are SEEN in different colours ACCORDING to the TEMPERATURE of their surfaces.

They are seen in different colours according to the temperature of their surfaces.

NORTH STAR. 

North star. 

The NEAREST VISIBLE STAR is ALPHA Centauri.

The nearest visible star is Alpha Centauri.

The most MASSIVE STAR is BETELGEUSE which is 300 times greater than the sun.

The most massive star is betelgeuse which is 300 times greater than the sun.

In 1572 .

In 1572 .

As the temperature is very high, these stars SHRINK and explode IMMEDIATELY on the exhaustion of FUEL. Then a new star appears to be BORN. Thus they EMERGE in space suddenly and unexpectedly. So they are called novae or new star.

As the temperature is very high, these stars shrink and explode immediately on the exhaustion of fuel. Then a new star appears to be born. Thus they emerge in space suddenly and unexpectedly. So they are called novae or new star.

SUPER GIANT novae stars are those which are far bigger and HEAVIER than the SUN. They have very high INTERNAL temperature.

Super giant novae stars are those which are far bigger and heavier than the sun. They have very high internal temperature.

About 5776 .

About 5776 .

The milky WAY is a spiral galaxy. The main body of the galaxy is a disc 100,000 light years across with a globular nucleus of about 16,000 light years in DIAMETER. It CONSISTS of more than a hundred billion stars. The SOLAR system BELONGS to the milky way.

The milky way is a spiral galaxy. The main body of the galaxy is a disc 100,000 light years across with a globular nucleus of about 16,000 light years in diameter. It consists of more than a hundred billion stars. The solar system belongs to the milky way.

1. SPIRAL
2. IRREGULAR
3. OVAL

Galaxies are formations of INNUMERABLE stars GROUPED by FORCE of GRAVITY.

Galaxies are formations of innumerable stars grouped by force of gravity.

Time is the fourth dimension; MODERN SCIENCE SEES SPACE and time as a unity, CALLED“spacetime”.

Time is the fourth dimension; modern science sees space and time as a unity, called“spacetime”.

Space sciecnce is the branch of STUDY which ENDEAVOURS to REVEAL the MYSTERIES of space.

Space sciecnce is the branch of study which endeavours to reveal the mysteries of space.

POLE STAR

Pole star

SIRIUS ( DOG STAR )

Sirius ( Dog star )

They have a density going up to 1,000 HYDROGEN ATOMS per cublic centimetre.

They have a density going up to 1,000 hydrogen atoms per cublic centimetre.

Stars are FORMED by GRAVITATIONAL contraction from VAST clouds of galactic GAS and dust.

Stars are formed by gravitational contraction from vast clouds of galactic gas and dust.

Sun

Sun

It is ESTIMATED to be a MILLION LIGHT YEARS .

It is estimated to be a million light years .

The LARGEST INDISTINGUISHABLE GALAXY FORMATION .

The largest indistinguishable galaxy formation .

ANDROMEDA GALAXY 

Andromeda galaxy 

ANDROMEDA GALAXY.

Andromeda galaxy.

Any region of space BEYOND limits determined with REFERNCE to the BOUNDARIES of a celectial body or system, especially the region of space immediately beyond earth’s atmosphere, interplanetary or INTERSTELLAR space.

Any region of space beyond limits determined with refernce to the boundaries of a celectial body or system, especially the region of space immediately beyond earth’s atmosphere, interplanetary or interstellar space.