Mercury

• Mercury is the closet planet to the Sun.
• Since Mercury is closet to the Sun, its temperature can be over 300 Celsius in the day time.
• Mercury rotates on its own axis very slowly, making one full rotation every 59 earth days.

Venus

• Venus is the second planet from the Sun
• The size of Venus is about the same as that of the Earth.
• The planet is always covered by a very thick cloud of carbon dioxide and acid vapor.
• Thus, the temperature of Venus is extremely high, even though Venus is twice as far from the Sun as Mercury and receives only a quarter as much light.
• As a result, the surface temperature can be above 450 Celsius.
• Venus takes about 225 days to revolve around the Sun.
• Venus rotates on its own axis once every 243 days

Earth

• Earth is the third planet from the Sun.
• It is fifth largest planet.
• It is the only planet with oxygen and water. Thus, it is the only planet on which living things can survive and grow
• Earth takes about 365 days to revolve around the Sun and rotates on its own axis once every 24 hours.
• Earth has natural satellite (the Moon) revolving around it.

Mars

• Mars is the fourth planet from the Sun.
• It also known as the Red Planet because its surface is being covered with red dust.
• Mars is a cold and lifeless planet.
• One revolution of Mars around the Sun takes 687 days.

Jupiter

• Jupiter is the largest planet in the Solar System.
• It is the fifth planet from the Sun.
• Most of Jupiter’s volume is made up of gases and ice with only a small rocky core.
• The atmosphere is composer of mainly hydrogen in gaseous and liquid forms together with helium, methane and ammonia.
• Jupiter has sixteen natural satellites or moons and takes about 12 years to revolve once around the Sun.
• Jupiter rotates so fast, once every ten hours, that it creates strong winds and great storms which persist over most of the planet.
• Therefore, Jupiter is the planet which has shortest day in the Solar System.

Saturn

• Saturn is the sixth planet from the Sun.
• It is surrounded by a system of rings which make it the most striking and beautiful planet when viewed through a telescope.
• Saturn is the second largest planet in the Solar System.
• However, it is lighter than a body of water of the same size.
• Saturn is thought to have a small rocky high-temperature core surrounded by ice and ammonia, mixed with grit gases.
• The time taken for Saturn to revolve around the Sun is around 29 years.
• Saturn rotates on its own axis once every 10.7 hours.

Uranus

• Uranus is the seventh planet from the sun in the Solar System.
• This planet is blue because it has cold gases, mainly made up of hydrogen and helium.
• Uranus also has a ring around it but the ring cannot be seen clearly because it is too thin and dim.
• It has five moons, and it rotates on its own axis slightly more slowly than Saturn.
• The time taken for Uranus to revolve around the Sun is around 84 years. 

Neptune

• Neptune, the eight planet from the Sun is almost the twin of Uranus.
• It is a little heavier than Uranus and is very slightly bigger. It is bluish-green.
• Neptune consists mainly of ice with some rocks and gases, and has less atmosphere.
• Neptune has two moons and takes about 165 years to revolve once around the sun.

Pluto

• Pluto is ninth planets from the Sun.
• It is the smallest planet in the Solar System, and is made of the rock thin ice.
• Pluto is a dark and cold planet its surface temperature can be as low as-230 Celsius.
• This planet can be seen only through a telescope because it is so far away from Earth.
• Pluto takes about 247.7 years to revolve once around the Sun.