Solar System.

What is Solar System. How many Planets are there in it. What are there names. Where we can compare Planets size.

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets and small Solar System bodies.                                                                                                                                        

There are 8 planets in our Solar System and 5 Dwarf planets.

Planets name	Distance from Sun	Dwarf Planets
1. Mercury	57.91 million Km	1. Pluto
2. Venus	108.2 million Km	2. Eris
3. Earth	149.6 million Km	3. Ceres
4. Mars	227.9 million Km	4. Makemake
5. Jupiter	778.5 million Km	5. Hauemea
6. Saturn	1.434 billion km
7. Uranus	2.871 billion Km

8. Neptune

4.495 billion Km

About Planets

Sun

The Sun—the heart of our solar system—is a yellow dwarf star, a hot ball of glowing gases. Its gravity holds the solar system together, keeping everything from the biggest planets to the smallest particles of debris in its orbit.

Though it is special to us, there are billions of stars like our Sun scattered across the Milky Way galaxy.

With a radius of 432,168.6 miles (695,508 kilometers), our Sun is not an especially large star—many are several times bigger—but it is still far more massive than our home planet: 332,946 Earths match the mass of the Sun.

More specifically, our Sun is in a spiral arm called the Orion Spur that extends outward from the Sagittarius arm. From there, the Sun orbits the center of the Milky Way Galaxy, bringing the planets, asteroids, comets and other objects along with it.

The Sun and the rest of the solar system formed from a giant, rotating cloud of gas and dust called a solar nebula about 4.5 billion years ago. As the nebula collapsed because of its overwhelming gravity, it spun faster and flattened into a disk. 

Energy from the core is carried outward by radiation, which bounces around the radiative zone, taking about 170,000 years to get from the core to the top of the convective zone.

Features

• The Sun accounts for 99.86% of the mass in the solar system.
• One day the Sun will consume the Earth.
• Over one million Earth’s could fit inside the Sun.
• The atmosphere of the Sun is composed of three layers.
• It takes eight minutes for light reach Earth from the Sun.

Important Fact- Sun travels 220 Km per second.

1. Mercury

Mercury is the smallest planet of our solar system. It is closest planet to the sun, but still Venus is more hotter. Mercury takes 59 Earth days to make full one rotation, So year on mercury goes very fast.

A day on Mercury is not like a day here on Earth. For us, the sun rises and sets each and every day. Because Mercury has a slow spin and short year, it takes a long time for the sun to rise and set there.

Features

• Mercury does not have any moon.
• It is very close to Sun.
• A year on Mercury goes last to last 88 earth days.
• Mercury does not contain any atmosphere.

Important Fact.

                           Mercury has year of 88 Earth days but it's a day goes of Earth 59 days, It means that 1 day of mercury has 1408 Earth hours.

 

2. Venus

Venus is the 2nd planet of solar system, although it is not the closest planet but still it is the hottest planet of solar system. It looks like very active as it has many natural elements like mountains & volcanoes. 

It has thick layer of atmosphere and also has system which traps heat and kept the atmosphere. It has 243 Earth days in a year, Mainly here Sun rises twice a year.

Features

• This planet does not have any moon.
• Venus has been known since ancient times because it can be seen easily without a telescope.
• Venus spins the opposite direction of Earth and most other planets.

Important Fact

                          A year on Venus lasts 225 Earth days, But it has a day comprising of Earth 243 days means it's 1 day has 5,832 Earth hours.

3. Earth

Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. 

The atmosphere protects us from incoming meteoroids, most of which break up in our atmosphere before they can strike the surface as meteorites. Right now, there are many satellites orbiting Earth taking pictures and measurements.

 

Features

• Earth is the third planet from the Sun in our solar system. That means Venus and Mars are Earth’s neighboring planets.
• Earth has lots of spacecraft watching it. There is still a lot we can learn about our home planet.
• Earth has just one Moon. It is the only planet to have just one moon.
• A day on Earth goes last for 24 hours.
• One year on Earth lasts 365.25 days. That 0.25 extra means every four years we need to add to one day to our calendar. We call it a leap year.

Important Fact

 It is the only planet which was formed approximately 4.54 billion years ago and is the only known planet to support life. 

4. Mars

Mars is a cold desert world. It is half the size of Earth. Mars is sometimes called the Red Planet. It's red because of rusty iron in the ground.

There are signs of ancient floods on Mars, but now water mostly exists in icy dirt and thin clouds. On some Martian hillsides, there is evidence of liquid salty water in the ground.

Features

• Mars has an active atmosphere, but the surface of the planet is not active. Its volcanoes are dead.
• Mars has a thin atmosphere.
• One year on Mars is 687 Earth days. It is almost twice as long as one year on Earth.
• Mars has two moons. Their names are Phobos and Deimos.
• One day on Mars lasts 24.6 hours. It is just a little longer than a day on Earth.

Important Fact

   Named after the Roman God of war.

5. Jupiter

Jupiter is the biggest planet in our solar system. It's similar to a star, but it never got big enough to start burning. It is covered in swirling cloud stripes. It has big storms like the Great Red Spot, which has been going for hundreds of years.

Jupiter is a gas giant and doesn't have a solid surface, but it may have a solid inner core about the size of Earth. Jupiter also has rings, but they're too faint to see very well.

Features

Jupiter is a gas giant. It is made mostly of hydrogen and helium.

Jupiter has a very thick atmosphere.

Jupiter has rings, but they’re very hard to see.

One day on Jupiter goes by in just 10 hours.

One year on Jupiter is the same as 11.8 Earth years.

Jupiter has 79 confirmed moons.

Important Fact

 Jupiter is the fastest spinning Planet in the Solar System.

6. Saturn

Saturn isn’t the only planet to have rings, but it definitely has the most beautiful ones. The rings we see are made of groups of tiny ringlets that surround Saturn. 

They’re made of chunks of ice and rock. Like Jupiter, Saturn is mostly a ball of hydrogen and helium.

Features

• Saturn has a thick atmosphere.
• Saturn has a lovely set of seven main rings with spaces between them.
• One day on Saturn goes by in just 10.7 hours.
• One year on Saturn is the same as 29 Earth years.
• Saturn has 53 moons! although 29 more are also there which are still unconfirmed.

Important Fact

     The main rings in Saturn could almost go from Earth to the moon. Yet, they are less than a kilometer thick.

7. Uranus

Uranus is made of water, methane, and ammonia fluids above a small rocky center.

Its atmosphere is made of hydrogen and helium like Jupiter and Saturn, but it also has methane. The inner rings are narrow and dark. The outer rings are brightly colored and easier to see.

Features

• Uranus is an ice giant (instead of a gas giant). It is mostly made of flowing icy materials above a solid core.
• Uranus has a thick atmosphere made of methane, hydrogen, and helium.
• Uranus is the only planet that spins on its side.
• Uranus spins the opposite direction as Earth and most other planets.
• One day on Uranus lasts a little over 17 hours.
• One year on Uranus is the same as 84 years on Earth.

Important Fact

                          Uranus was the first planet found using telescope.

8. Neptune

Neptune is dark, cold, and very windy. It's the last of the planets in our solar system. It's more than 30 times as far from the sun as Earth is. Neptune is very similar to Uranus.

Its atmosphere is made of hydrogen, helium, and methane. The methane gives Neptune the same blue color as Uranus. 

Features

• Neptune is encircled by six rings.
• Neptune, like Uranus, is an ice giant. It’s similar to a gas giant. It is made of a thick soup of water, ammonia, and methane flowing over a solid core about the size of Earth.
• One day on Neptune goes by in 16 hours.
• Neptune has such a long journey around the sun it takes 165 takes Earth years to go around once.
• Neptune has 13 moons.

Important Fact

                            Neptune was named after the Roman god of the Sea due to its blue coloration.

How to compare two Planets size at same time?

Now, the question is all of us know the size of planets but how we can compare two planets size. 

Just click on the 'Compare Size' which is located in left Corner 

Under Earth block.

So, Scan this code or click on this link, and compare planets for which you are eager.