Our Solar System
-
Upload
prahlad-pai -
Category
Education
-
view
331 -
download
0
Transcript of Our Solar System
![Page 1: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/1.jpg)
THE UNIVERSE ,OUR THE UNIVERSE ,OUR GALAXY AND OUR GALAXY AND OUR
SOLAR SYSTEM SOLAR SYSTEMPresented ByPresented By
K. PRAHLAD. PAIK. PRAHLAD. PAI
![Page 2: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/2.jpg)
CONTENTSCONTENTS INTRODUCTIONINTRODUCTION OUR SOLAR OUR SOLAR
SYSTEMSYSTEM GALAXYGALAXY SUNSUN MOONMOON PLANETSPLANETS ASTEROIDESASTEROIDES METEORITESMETEORITES BLACK HOLEBLACK HOLE COMETSCOMETS STARSSTARS CONCLUSIONCONCLUSION REFERENCEREFERENCE
![Page 3: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/3.jpg)
INTRODUCTIONINTRODUCTIONThe universe is a group of planets, The universe is a group of planets,
moons and different types of cosmic moons and different types of cosmic bodies out of which many are bodies out of which many are
unknown to man . Lets have an unknown to man . Lets have an overview of our solar system.overview of our solar system.
![Page 4: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/4.jpg)
Formation of the Solar Formation of the Solar SystemSystem
The solar system was born in The solar system was born in a great cloud of gas and dust a great cloud of gas and dust
about 5000 million years about 5000 million years ago. There are many clouds ago. There are many clouds like this, called nebulae in like this, called nebulae in
the space between the stars.the space between the stars.
![Page 5: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/5.jpg)
OUR SOLAR SYSTEMOUR SOLAR SYSTEM
![Page 6: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/6.jpg)
The Milky Way is an The Milky Way is an example of a gigantic example of a gigantic
collection of stars, collection of stars, gas, and dust that we gas, and dust that we call a galaxy. And this call a galaxy. And this
is our galaxy.is our galaxy.
GalaxiesGalaxies
![Page 7: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/7.jpg)
The Milky WayThe Milky WayThere are more than 200 billion There are more than 200 billion
stars belonging to our galaxy, The stars belonging to our galaxy, The Milky Way. The Milky Way is Milky Way. The Milky Way is
about 1,00,000 light years across. about 1,00,000 light years across. Earth lies about 30,000 light years Earth lies about 30,000 light years
from the centre. Astronomers from the centre. Astronomers have recently determined that a have recently determined that a
huge object, possibly a Black Hole huge object, possibly a Black Hole lies in the centre of the Milky Way.lies in the centre of the Milky Way.
![Page 8: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/8.jpg)
AndromedaAndromeda
The Andromeda is our The Andromeda is our nearest galaxy. It contains nearest galaxy. It contains hundreds of billions of stars hundreds of billions of stars
and it is 14 quintillion km and it is 14 quintillion km from here.from here.
![Page 9: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/9.jpg)
GAS GIANTSGAS GIANTS
The last four planets The last four planets (Jupiter, Saturn, (Jupiter, Saturn, Uranus, Neptune) of Uranus, Neptune) of the solar system are the solar system are known as the ”Gas known as the ”Gas Giants” because they Giants” because they are the largest in the are the largest in the solar system.solar system.
![Page 10: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/10.jpg)
OUR STAR, THE SUNOUR STAR, THE SUNThe sun was born along with The sun was born along with the rest of the solar system, the rest of the solar system,
about 5000 million years about 5000 million years ago. It has been shining ago. It has been shining
steadily ever since. The sun steadily ever since. The sun is 10 times bigger across is 10 times bigger across than jupiter and it could than jupiter and it could
swallow more than a million swallow more than a million earth.earth.
![Page 12: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/12.jpg)
MERCURYMERCURYMercury is the planet closest Mercury is the planet closest
to the sun. It is also the to the sun. It is also the fastest moving planet, fastest moving planet,
whizzing round the sun in whizzing round the sun in just 88 days. Mercury has an just 88 days. Mercury has an oval orbit . At times it travels oval orbit . At times it travels as far as 70 million km away as far as 70 million km away
from the sun. At others, it from the sun. At others, it gets as close as 46 million gets as close as 46 million
kmkm. .
![Page 13: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/13.jpg)
MERCURIE’S OVAL ORBITMERCURIE’S OVAL ORBIT
![Page 14: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/14.jpg)
MERCURY DATAMERCURY DATADiameter at equator : 4,880 kmDiameter at equator : 4,880 kmAverage distance from sun : 58 million kmAverage distance from sun : 58 million kmMinimum distance from Earth : 91 million Minimum distance from Earth : 91 million
kmkmLength of day:59 Earth daysLength of day:59 Earth daysLength of year : 88 Earth yearsLength of year : 88 Earth yearsTemperature:185 degree c to 430 degreeTemperature:185 degree c to 430 degreeSatellites: 0Satellites: 0
![Page 15: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/15.jpg)
VENUSVENUS
Venus is the closest planet to Venus is the closest planet to earth. We often see it shining in earth. We often see it shining in
the western sky after sunset. the western sky after sunset. Which is why it is known as the Which is why it is known as the evening star. Venus clouds are evening star. Venus clouds are
made up of tiny droplets of made up of tiny droplets of sulphuric acid, one of the sulphuric acid, one of the strongest acid we know.strongest acid we know.
![Page 16: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/16.jpg)
VENUS DATAVENUS DATA
Diameter of equator: 12,100 kmDiameter of equator: 12,100 kmAverage distance from sun:108 million kmAverage distance from sun:108 million kmMinimum distance from Earth: 42 million Minimum distance from Earth: 42 million
kmkmTurns on axis : 243 Earth daysTurns on axis : 243 Earth daysCircles sun: 225 Earth daysCircles sun: 225 Earth daysSurface temperature: 480 degree cSurface temperature: 480 degree c
![Page 17: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/17.jpg)
EARTHEARTH
From space our planet From space our planet earth seems to be blue in earth seems to be blue in colour.This is because of colour.This is because of colour of oceans which colour of oceans which covers over 2/3 of the covers over 2/3 of the
Earth surface. Earth surface.
![Page 18: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/18.jpg)
How has Earth How has Earth changed?changed?
Earth formed about 4,600million years Earth formed about 4,600million years ago when bits of matter in space ago when bits of matter in space
came together. At first it was a great came together. At first it was a great molten ball. It gradually cooled and molten ball. It gradually cooled and atmosphere and oceans eventually atmosphere and oceans eventually
formedformed..
![Page 19: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/19.jpg)
CRATERS ON EARTH CRATERS ON EARTH
![Page 20: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/20.jpg)
EARTH DATAEARTH DATA
Diameter of equator: 12,756 kmDiameter of equator: 12,756 kmAverage distance from sun: 149.6 million kmAverage distance from sun: 149.6 million kmTurns on axis: 23hrs 56minTurns on axis: 23hrs 56minYear length: 365.25 daysYear length: 365.25 daysSurface Temperature: -86 deg c to 58 deg c Surface Temperature: -86 deg c to 58 deg c Satellites: MoonSatellites: Moon
![Page 21: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/21.jpg)
MOONMOONAny object or planet which Any object or planet which orbits a planet is called a orbits a planet is called a moon .Our moon circles moon .Our moon circles earth once a month. Our earth once a month. Our
moon has no atmosphere, moon has no atmosphere, no weather and no lifeno weather and no life..
![Page 22: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/22.jpg)
Formation of the MOONFormation of the MOON
![Page 23: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/23.jpg)
Conspiracy TheoryConspiracy Theory
This theory was proposed against This theory was proposed against NASA by some experts. This NASA by some experts. This
theory gives many evidences to theory gives many evidences to prove that man never landed on prove that man never landed on
MOON.MOON.
![Page 24: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/24.jpg)
![Page 25: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/25.jpg)
FIRST STEP ON FIRST STEP ON MOONMOON
Astronauts landed on the Astronauts landed on the moon for the first time on moon for the first time on July 20, 1969. They were July 20, 1969. They were
Edwin Aldrin and Neil Edwin Aldrin and Neil Armstrong. Armstrong was Armstrong. Armstrong was the first human to stand on the first human to stand on
the moon. the moon.
![Page 26: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/26.jpg)
MOON DATAMOON DATADiameter at equator: 3476 kmDiameter at equator: 3476 kmMinimum distance from earth : 3,56,000 kmMinimum distance from earth : 3,56,000 kmTime to circle earth : 27.3 earth daysTime to circle earth : 27.3 earth daysSurface Temperature: -170 degree c to 110 Surface Temperature: -170 degree c to 110
degree c degree c
![Page 27: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/27.jpg)
MARSMARSSmall and red in colour Small and red in colour
MARS is more like MARS is more like earth. Although people earth. Although people believe there is life on believe there is life on
MARS, it’s too cold MARS, it’s too cold there and the there and the
atmosphere is too thin atmosphere is too thin for life to exist. for life to exist.
![Page 28: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/28.jpg)
Why is MARS called Why is MARS called the ‘Red Planet’ ? the ‘Red Planet’ ?
MARS is called as the red planet because MARS is called as the red planet because of its colour. Its surface is reddish orange. of its colour. Its surface is reddish orange. This colour comes from the rust like iron This colour comes from the rust like iron minerals in the surface rocks and soils. minerals in the surface rocks and soils.
![Page 29: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/29.jpg)
MARS DATAMARS DATA Diameter of equator: 6,789 kmDiameter of equator: 6,789 km Average distance from sun: 228 million kmAverage distance from sun: 228 million km Minimum distance from earth: 56 million kmMinimum distance from earth: 56 million km Turns on axis: 24 hrs 37 minTurns on axis: 24 hrs 37 min Circles sun: 687 earth daysCircles sun: 687 earth days Surface Temperature: -110 degree c to 0 Surface Temperature: -110 degree c to 0
degree cdegree c Satellites: 2Satellites: 2
![Page 30: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/30.jpg)
Jupiter is by far the largest of Jupiter is by far the largest of the planets. It has more mass the planets. It has more mass
than all other planets put than all other planets put together. It could swallow together. It could swallow
more than 1,300 bodies the more than 1,300 bodies the size of earth. It takes less size of earth. It takes less than 10 hrs to spin round than 10 hrs to spin round
once. This means its surface once. This means its surface is spinning at a speed of is spinning at a speed of
45,000km an hour45,000km an hour
JUPITERJUPITER
![Page 31: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/31.jpg)
What’s the Great Red What’s the Great Red Spot?Spot?
It is a gigantic swirling It is a gigantic swirling storm like a huge storm like a huge
hurricane on earth. It hurricane on earth. It measures about 40,000 measures about 40,000 km across, 3 times km across, 3 times
the size of earth.the size of earth.
![Page 32: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/32.jpg)
![Page 33: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/33.jpg)
JUPITER DATAJUPITER DATADiameter at equator: 1,42,800 kmDiameter at equator: 1,42,800 kmAverage distance from sun: 778 million kmAverage distance from sun: 778 million kmMinimum distance from earth : 590 million Minimum distance from earth : 590 million
kmkmTurns on axis: 9 hrs 60 minTurns on axis: 9 hrs 60 minCircles sun: 11.9 earth years Circles sun: 11.9 earth years Temperature : 150 degree cTemperature : 150 degree cSatellites known : 63 Satellites known : 63
![Page 34: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/34.jpg)
SATURNSATURNSaturn is the second Saturn is the second biggest planet after biggest planet after
Jupiter . It is a giant ball of Jupiter . It is a giant ball of gas. It is the favorite gas. It is the favorite among astronomers among astronomers
because of its shining because of its shining rings. It is largely made of rings. It is largely made of
ice. Saturn’s biggest ice. Saturn’s biggest satellite Titan is the second satellite Titan is the second
largest moon in the solar largest moon in the solar system. system.
![Page 35: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/35.jpg)
What are Saturn rings What are Saturn rings made of ?made of ?
Only three out of many rings Only three out of many rings can be seen from the earth. can be seen from the earth. The rings are made up of The rings are made up of
millions of bits of ice whizzing millions of bits of ice whizzing round the planet at a high round the planet at a high
speed. speed.
![Page 36: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/36.jpg)
SATURN DATASATURN DATA Diameter at equator: 120,000 kmDiameter at equator: 120,000 km Diameter of visible rings: 270,000 kmDiameter of visible rings: 270,000 km Average distance from sun: 1427 million kmAverage distance from sun: 1427 million km Minimum distance from earth: 1200 million kmMinimum distance from earth: 1200 million km Turns on axis: 10 hrs 40 minTurns on axis: 10 hrs 40 min Circles sun: 29.5 Earth yearsCircles sun: 29.5 Earth years Temperature: -170 degree cTemperature: -170 degree c Satellites known : 63Satellites known : 63
![Page 37: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/37.jpg)
URANUSURANUS
Uranus is the third biggest planet Uranus is the third biggest planet and 4 times bigger than earth. In and 4 times bigger than earth. In
1977 Uranus rings were 1977 Uranus rings were discovered. It has a thick discovered. It has a thick
atmosphere containing hydrogen, atmosphere containing hydrogen, helium and methane ice.helium and methane ice.
![Page 38: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/38.jpg)
URANUS DATAURANUS DATA Diameter at equator : 51,000kmDiameter at equator : 51,000km Average distance from sun: 2870 million kmAverage distance from sun: 2870 million km Minimum distance from earth: 2600 million kmMinimum distance from earth: 2600 million km Turns on axis: 17 hr 14 minTurns on axis: 17 hr 14 min Circles sun: 84 earth yearsCircles sun: 84 earth years Temperature : 200 degree cTemperature : 200 degree c Satellites : 15Satellites : 15
![Page 39: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/39.jpg)
NEPTUNENEPTUNEAt the edge of solar At the edge of solar
system, Neptune is a system, Neptune is a giant like Uranus .It giant like Uranus .It has a lovely blue has a lovely blue
colour as a result of colour as a result of methane gas in its methane gas in its
atmosphere.atmosphere.
![Page 40: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/40.jpg)
NEPTUNE DATANEPTUNE DATA Diameter at equator: 49,500 kmDiameter at equator: 49,500 km Average distance from sun: 4500 million kmAverage distance from sun: 4500 million km Minimum distance from Earth: 4300 million kmMinimum distance from Earth: 4300 million km Turns on axis : 17 hrs 6 minTurns on axis : 17 hrs 6 min Circles Sun: 165 Earth yearsCircles Sun: 165 Earth years Temperature: -210 degree cTemperature: -210 degree c Satellites: 8 Satellites: 8
![Page 41: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/41.jpg)
NOW PLUTO IS NOT ONE NOW PLUTO IS NOT ONE OF THE NINE PLANETS OF THE NINE PLANETS Pluto used to be considered one of Pluto used to be considered one of the nine planets but, due to recent the nine planets but, due to recent
discoveries and new facts about the discoveries and new facts about the planet, it is now classified a dwarf planet, it is now classified a dwarf
planet. Scientists have been wrongly planet. Scientists have been wrongly classifying celestial bodies for classifying celestial bodies for
centuries. An asteroid one day, centuries. An asteroid one day, could become, a moon another day. could become, a moon another day.
![Page 42: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/42.jpg)
We don’t know much about We don’t know much about Pluto because its so far Pluto because its so far
away at its farthest. It was away at its farthest. It was discovered in 1930. It discovered in 1930. It
travels more than 7000 travels more than 7000 million km from the sun. million km from the sun.
Even in powerful telescope Even in powerful telescope it looks like a faint star. No it looks like a faint star. No space probes have ever space probes have ever
visited Pluto.visited Pluto.
![Page 43: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/43.jpg)
PLUTO DATAPLUTO DATA Diameter of equator: 2250 kmDiameter of equator: 2250 km Average distance from sun: 5900 million kmAverage distance from sun: 5900 million km Minimum distance from Earth: 4300 kmMinimum distance from Earth: 4300 km Turns on axis: 6 Earth days and 9 hoursTurns on axis: 6 Earth days and 9 hours Circles sun: 248 Earth years Circles sun: 248 Earth years Surface temperature: -230 degree cSurface temperature: -230 degree c Satellites: 1Satellites: 1 Diameter of the orbit: 15000 million kmDiameter of the orbit: 15000 million km
![Page 44: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/44.jpg)
StarStarWhen a near by star explodes, When a near by star explodes, a shock wave travels through a shock wave travels through the cloud. The cloud begins to the cloud. The cloud begins to shrink to form a new star. The shrink to form a new star. The Sun, a small yellow star burns Sun, a small yellow star burns hydrogen more steadily. The hydrogen more steadily. The speed at which the stars burn speed at which the stars burn
hydrogen determines how hydrogen determines how long they will live. long they will live.
![Page 45: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/45.jpg)
A Black HoleA Black HoleAfter a very heavy star uses After a very heavy star uses
up its hydrogen and explodes up its hydrogen and explodes as a supernova, its core as a supernova, its core
becomes smaller and smaller becomes smaller and smaller until, finally it is smaller than until, finally it is smaller than the head of a pin. The star the head of a pin. The star
however still has gravity. This however still has gravity. This is so strong that even light is so strong that even light
from a few km around the star from a few km around the star cannot escape. This is called cannot escape. This is called
a Black Hole.a Black Hole.
![Page 46: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/46.jpg)
AsteroidsAsteroids
The solar system has many The solar system has many different members, the different members, the smallest of which are smallest of which are
asteroids and meteorites. asteroids and meteorites. Most asteroids lie in the Most asteroids lie in the
enormous space between enormous space between the orbits of Mars and the orbits of Mars and
Jupiter.Jupiter.
![Page 47: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/47.jpg)
MeteoritesMeteoritesMeteorites are dust particles in Meteorites are dust particles in
space. When a meteoroid space. When a meteoroid encounters the Earth’s upper encounters the Earth’s upper atmosphere at high speed ,it atmosphere at high speed ,it usually burns up and forms a usually burns up and forms a
bright meteor . Some people call bright meteor . Some people call this brief streak of light a this brief streak of light a
“Shooting Star”.“Shooting Star”.
![Page 48: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/48.jpg)
CometsCometsComets are icy balls that Comets are icy balls that sweep through the solar sweep through the solar
system. As the comet system. As the comet journeys towards the Sun, the journeys towards the Sun, the solar wind blows a stream of solar wind blows a stream of dust and gas away from the dust and gas away from the
comet and the sun .This forms comet and the sun .This forms the comet’s tail.the comet’s tail.
![Page 49: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/49.jpg)
AliensAliens
Aliens are the living beings from Aliens are the living beings from outer space. They are predicted to outer space. They are predicted to
be more stronger and intelligent be more stronger and intelligent than humans. There are stories than humans. There are stories and evidences to say that aliens and evidences to say that aliens
had come to earth long back and had come to earth long back and could return any time in future.could return any time in future.
![Page 50: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/50.jpg)
Unidentified Flying Object Unidentified Flying Object (UFO)(UFO)
An unidentif ied f lying object , or UFO, is any apparent flying object which cannot be identified by the observer and which remains unidentified after investigation. The term f lying saucer is also sometimes used.
A 1952 photo of a purported UFO over Passaic, New Jersey, from an FBI document.
![Page 51: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/51.jpg)
CONCLUSIONCONCLUSION
We believe our solar system is a We believe our solar system is a large place but its nothing when large place but its nothing when compared to the unimaginable compared to the unimaginable
vastness of the universe. Scientists vastness of the universe. Scientists have considered only the first eight have considered only the first eight planets but astrologers still consider planets but astrologers still consider
PLUTO as the ninth planet .PLUTO as the ninth planet .
![Page 52: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/52.jpg)
REFERENCEREFERENCE
www.bbc.co.uk/science/spacewww.bbc.co.uk/science/spacewww.NASA.govwww.NASA.govwww.nasa.gov/kids.htmlwww.nasa.gov/kids.htmlwww.spacekids.comwww.spacekids.comwww.spaceplace.jpl.nasa.govwww.spaceplace.jpl.nasa.gov
![Page 53: Our Solar System](https://reader030.fdocuments.us/reader030/viewer/2022032615/55a37fcf1a28ab75598b457f/html5/thumbnails/53.jpg)
THANK YOUTHANK YOU