asteriods, meteors and comet

DEEP SKY OBJECTs

ASTERIODS, METEORite &

COMET

PRESENTED BY ANUJ, ANUP & NITESH

ASTERIODS

WHAT ARE asteriods?• ASTERIODE ARE

SOLID PIECES OF

ROCK AND METAL

THAT ORBITS MAINLY

BETWEEN THE SUN

AND JUPITER.

WHAT DO THEY LOOK LIKE?

• Asteroids are very

irregular in shape.

• They are quite similar to

small planets or moon

like phobos (a natural

satellite of mars).

• Unlike comets, they do

not have cloud of diffuse

light around them.

TYPEs OF ASTERIODS• M are believed to be

metallic.

• C are thought to be

carbonaecous.

• S contain more

silicates.

ASTEROID : LUTETIA-1

WHERE ARE asteriods?• ASTERIODES ARE MAINLY

FOUND IN ASTERIOD BELT.

• ASTERIOD BELT IS

LOCATED BETWEEN ORBIT

OF MARS & JUPITER.

HAVE THEY HIT US BEFORE?

Many scientists

believe that asteroids

have hit the Earth

many times

in its history.

is Jupiter necessary for life on Earth?

EARTH JUPITER

METEORite

A FEW DEFINITIONS• METEOROID: THEY ARE SMALL PART OF

ROCK & METAL THAT ARE FLYING AROUND THE SOLAR SYSTEM.

• METEOR: WHEN METEOROID ENTERS THE EARTH ATMOSPHERE THEN IT IS SAID TO BE METEOR.

• METEORITE: WHEN METEOR STRIKES THE EARTH SURFACE THEN IT IS SAID TO BE METEORITE.

WHAT IS THE DIFFERENCE?

Iron Meteorites• These are very dense

and made almost

entirely of iron.

• They show a pattern of

crystallization that

indicates a VERY

SLOW cooling rate.

Stony-Iron Meteorites• These are rare and

contain both metal

and stone.

• They are mostly or

completely

shattered.

HAVE THEY HIT US BEFORE?

• Most meteoroids

disintegrate before

reaching the earth by

burning up in Earth’s

atmosphere.

• Some leave tail that lasts

for several minutes large

one can cause damage.

lonar , maharashtra• 52000 year ago.

• This lake was created by

60 meter long & 2

millions tons of heavy

meteor.

• The average depth of

Lonar lake is 150m &

1.2km in diametere.

METEOR• Sometimes called a

“Shooting Star”.

• When a meteorite enters

Earth’s atmosphere,

friction causes them to

burn up, producing a

streak of light.

METEOR SHOWERS

There about one dozen meteor showers that occur on regular dates throughout the year.

These showers are caused by debris left behind by a comet that passes close to orbit of our planet.

comet

What ARE comet?• A comet is small

heavenly body and

consist of mainly dust,

ice & some small

gritty particle.

• Sometime called

“dirty snowballs”.

WHAT is the structure of comet?

• Nucleus– 10 km “Dirty Snowball”

• Coma– Cloud of evaporated

ices and ions.– may be 100,000 km in

diameter.• Tail

– Always points away from Sun

TYPES OF COMET Comets are classified as either short-period or

long- period comet:

Short Period: (such as Halley's seen in every

76 years) with periods from years to decades.

Long Period: (such as humason seen in every

75 thousand year) with period from centuries to

thousands of years.

Where do comet come from?OORT CLOUD KUIPER BELT

• Many ordinate in a region

called the Oort cloud.

which is located beyond

the orbit of the planet

Pluto.

• But most of comets come

from Oort cloud.

• Oort cloud consists

trillions of comet.

• Others originate in the

Kuiper Belt beyond the

orbit of Neptune.

• Kuiper belt is a source of

short life comets such as

halley.

• Kuiper belt consists of

billions of comet .

OORT CLOUD & KUIPER BELT

FAMOUS COMET HALLEYSEEN AT 10 MARCH (1986)

SIR EDMUND HALLEY COMET HALLEY

ARE COMETS DANGEROUS?COMET HITTING THE JUPITER.SHOEMAKER-LEVY-9(JULY 1998)

EFFECT OF SHOEMAKER-LEVY-9

COMET MISSION BY E.S.A.

• ROSETTA 11 YEAR MISSION.

• LAUNCHED ON FOURTH

MARCH 2004.

• PASSES BY MARS, ASTEROID

STEINS AND LUTETIA-1.

• HIBERNATE FOR 31 MONTH .

• USES SOLAR ENERGY TO FLY.

• LANDED AT 10 NOVEMBER

2014 ON COMET 67-P.

• TO SEARCH ABOUT

PLATINIUM. IRON & GOLD etc....

WHAT IS THE DIFFERENCE BETWEEN

ASTEROID, METEORoid & COMET?• THEY ARE ACTUALLY SPACE WASTE or SPACE

DUST.

• THEY ARE VALUABLE AS WELL AS DANGEROUS

FOR US.

• ASTEROID : A HUGE PIECE OF METAL IN SPACE.

• METEORIDE : THEY ARE LIKE A ROCK IN SPACE,

THEY ARE THE PART OF ASTEROIDS.

• COMET : A ENORMOUS PIECE OF ICE IN SPACE.

ACKNOWLEDGEMENT• GOOGLE (WIKIPEDIA).• REFERENCE BOOK OF ASTRONOMY.• YOU TUBE.

THANK YOU