1. The universe is made up of a number of galaxiesThe universe is made up of a number of galaxies
in one such galaxy there is a solar system. Thein one such galaxy there is a solar system. The
solar system consists of 8 planets – Mercury ,solar system consists of 8 planets – Mercury ,
Venus, Earth, Mars, Jupiter, Saturn, Uranus,Venus, Earth, Mars, Jupiter, Saturn, Uranus,
Neptune and Pluto ( which was a planet but nowNeptune and Pluto ( which was a planet but now
it has got a pink slip). They all move on their pathit has got a pink slip). They all move on their path
known as ‘orbit’. They all move around a big starknown as ‘orbit’. They all move around a big star
called ‘Sun’. They all can be seen through acalled ‘Sun’. They all can be seen through a
instrument known as ‘instrument known as ‘Telescope’.Telescope’.

2. Mercury:Mercury: It is the nearest planet to the Sun. It’sIt is the nearest planet to the Sun. It’s
temperature is -170 Degree to 430 degreetemperature is -170 Degree to 430 degree
Celsius. It has no satellite. It completes one fullCelsius. It has no satellite. It completes one full
rotation after 88 earth days.rotation after 88 earth days.
Venus:Venus: It is the second planet after Mercury. ItIt is the second planet after Mercury. It
is named after the Greek god. It’s temperatureis named after the Greek god. It’s temperature
is same as Mercury. It also takes 88 earth daysis same as Mercury. It also takes 88 earth days
to complete one full rotation.

3. Earth:Earth: Earth is a special type of a planet. It isEarth is a special type of a planet. It is
the only planet with life on it. It’s temperature isthe only planet with life on it. It’s temperature is
58 degree Celsius to -89.6 degree Celsius. It58 degree Celsius to -89.6 degree Celsius. It
has three seasons namely Winter, Summer andhas three seasons namely Winter, Summer and
Monsoon. It has a satellite called moon. TheMonsoon. It has a satellite called moon. The
U.S.A. astronomer Neil Armstrong landed onU.S.A. astronomer Neil Armstrong landed on
the moon by keeping firstly his left leg on it.the moon by keeping firstly his left leg on it.

4. Mars:Mars: The red planet is the third planet in SolarThe red planet is the third planet in Solar
system. It’s temperature is -140 degrees to 20system. It’s temperature is -140 degrees to 20
degrees Celsius. It's rotation period is 1 earthdegrees Celsius. It's rotation period is 1 earth
year and 10 ½ months. It has two satelliteyear and 10 ½ months. It has two satellite
Deimos and Phobos. Phobos has a diameter ofDeimos and Phobos. Phobos has a diameter of
22km. Deimos has a diameter of 14km.22km. Deimos has a diameter of 14km.

5. Jupiter:Jupiter: It is the fifth planet away from the Sun.It is the fifth planet away from the Sun.
This is the biggest planet in the solar systemThis is the biggest planet in the solar system
founded by Galileo Galilee. It’s averagefounded by Galileo Galilee. It’s average
temperature is -140 degree Celsius. This planettemperature is -140 degree Celsius. This planet
has three thin rings around it’s equator. Thishas three thin rings around it’s equator. This
planet has 16 satellites. The four large planetsplanet has 16 satellites. The four large planets
are respectively given:- Lo, Europa, Ganymedeare respectively given:- Lo, Europa, Ganymede
and Callistol. These all were discovered byand Callistol. These all were discovered by
Galileo in 1610.Galileo in 1610.

6. Saturn:Saturn: It is the second largest planet afterIt is the second largest planet after
Jupiter. It has 7 rings around the equator. TheyJupiter. It has 7 rings around the equator. They
were discovered by the Italian scientist Galileowere discovered by the Italian scientist Galileo
Galilee in the 1600’s. It’s temperature is -180Galilee in the 1600’s. It’s temperature is -180
degree Celsius. Saturn has the highest numberdegree Celsius. Saturn has the highest number
of satellies(18). Titan is largest of all. Someof satellies(18). Titan is largest of all. Some
other satellites are Mimas,Iaptus,Hyperion.other satellites are Mimas,Iaptus,Hyperion.

7. Uranus:Uranus: Uranus is the third largest planet afterUranus is the third largest planet after
Saturn. This planet was discovered by SirSaturn. This planet was discovered by Sir
William Herschel 1781. It’s temperature is -220William Herschel 1781. It’s temperature is -220
degree Celsius. It has 10 rings which are 50kmdegree Celsius. It has 10 rings which are 50km
long. It has 17 satellites. All the seventeen oflong. It has 17 satellites. All the seventeen of
them were named after the plays of Williamthem were named after the plays of William
Shakespeare and Alexander Pope. The largestShakespeare and Alexander Pope. The largest
and brightest satellite is Titania. Some otherand brightest satellite is Titania. Some other
satellites are Oberon, Cordelia. Cordelia is thesatellites are Oberon, Cordelia. Cordelia is the
smallest of them.smallest of them.

8. Neptune:Neptune: Neptune is the fourth largest planet inNeptune is the fourth largest planet in
the solar system. It’s temperature is -210the solar system. It’s temperature is -210
degree Celsius. Neptune has eight satellites.degree Celsius. Neptune has eight satellites.
Only two of them can be seen from the earth byOnly two of them can be seen from the earth by
telescope. The other 6 and several rings weretelescope. The other 6 and several rings were
discovered by Voyager 2 in 1989. Triton isdiscovered by Voyager 2 in 1989. Triton is
Neptune’s largest satellite. Neptune takes 165Neptune’s largest satellite. Neptune takes 165
earth days to complete one full rotation.earth days to complete one full rotation.

9. Pluto is not a planet though there is a littlePluto is not a planet though there is a little
information and a diagram of Pluto.information and a diagram of Pluto.
Pluto:Pluto: Pluto was discovered by W.Tombaugh inPluto was discovered by W.Tombaugh in
1930. Pluto’s temperature is -230 degree to1930. Pluto’s temperature is -230 degree to
-220 degree Celsius. Pluto takes 247.7 yeas to-220 degree Celsius. Pluto takes 247.7 yeas to
complete one full rotation. Pluto has 1 satellitecomplete one full rotation. Pluto has 1 satellite
called Charon. Charon was discovered bycalled Charon. Charon was discovered by
James W. Christy in 1978. Pluto after gettingJames W. Christy in 1978. Pluto after getting
the pink slip is now known as ‘The Dwarfthe pink slip is now known as ‘The Dwarf
Planet’.Planet’.

10. Balraj Shukla