Our Solar system

Introduction:

    There are more than 500 solar system in our Milky Way Galaxy and our solar system is among the one. In our solar system there are 8 planets, more than 100 moons, astroids, comet, dwarf planet, cloud dust, etc. All these objects are attracted by the Sun's gravitational force, Our Sun plays a crucial role in our solar system. These 8 planets are divided into two groups Inner Planets or terrestrial planets and Outer Planets or Jovian planets.

    Mercury, Venus, Earth, Mars are called as Inner planets. All these planets are made up of Rocky metrials and they are solid, there is no ring system.

    Jupiter, Saturn, Uranus, Neptune are called as Outer planets. All these planets contains more number of moons, Jupiter and Saturn are called gas planets, Uranus and Neptune are called ice planets.

Sun:

    Our sun was formed from Solar Nebula cloud, it contains more number of Hydrogen and Helium gases in it. About 450 billion years ago these gases are gets gather due to the gravitational force, during  the process a high amount of heat is produced when the heat increases to 1 billion degree Celsius our Sun was formed, this stage was called Sun's protostar stage.

    Our sun is a Star, and it is the only star closer to us, it contains 70% hydrogen, 28% helium and remaining gases are carbon, nitrogen, oxygen. The life time of our Sun is 1000 billion years and it already passed 450 billion years and it remains 550 billion years.

    During its final years the sun becomes more bigger and brighter, it will swallow till our Earth and Mars, and emits high amount of heat. Let's look at the planets which are hold by Sun's gravitational force.

1) Mercury

            The closest planet to the Sun, Due to the closer to the sun, the gravitational force is stronger on Mercury so it take 88 Earth days to revolve around the sun, it spins in 3:2 ratio, the temperature on Mercury is about 420°C, it has hot days and freezing nights because it has no atmosphere to trap the sun's heat.

            There are many craters on Mercury like our Moon. Calories planitia is the biggest crater on Mercury. Mercury is the smallest planet in our solar system. Even Mercury is the closest planet to sun but it is not the hottest planet in our solar system.

2)Venus

          The hottest and brightest planet in our solar system, the surface temperature is about 482°C, it spins opposite direction to the Earth (i.e) sunrise in west direction. It reflects 75% sun light and Venus is also called as morning star because due it brightness it can visible in naked eyes from the Earth. Many researchers and scientists believes that Venus could have same atmosphere as Earth, and the size of Venus is almost equal to the Earth, Venus is also called as Earth's sister planet.

           Venus has a thin atmosphere and it contains more amount of green house gases, these gases trap the heat and it circulate inside the planet and this forms Venus is the hottest planet in the Solar system.

3)Earth

          The only planet in our solar system capable of supporting life, Our earth is home for billions of creatures, it has air, water, mountains, snow, etc and about 70% Earth's surface is covered by water. Earth is neither near to the sun nor far, it is in the perfect distance and this region is called Habitable zone.

4) Mars

          Mars is 2 times bigger than our Moon, excess amount of iron oxide the surface looks in red in colour, we found the water in ice state. Mars has seasons like our Earth.

          Researchers believe that there may be a life on this Red planet, and we have sent many rovers, orbiters, landers to the Mars reather than any planet. It may be our second home because it was locate in the Habitable zone. Mars has two moons, mountains, microbial life. Olympus Mons on Mars is the tallest mountain in the solar system.

5) Jupiter

          A gas giant in our solar system, it consists of 90% hydrogen, 10% helium, it also has rings due to lesser density it can't visible, the atmosphere is pressurized with gases so it's very hard to enter.

          Jupiter has same gases like sun.But it can't become a star due to the ratio of gases, so that Jupiter is also called as a failed planet. Jupiter is famous for its Red spot, this is a cyclone which was formed in 300 years ago and is still active.

6) Saturn

          The biggest planet in our Solar system is Saturn, it is well know for its beautiful rings. It has 7 rings, the planet is very less dense than water, this planet is made up of gases, liquid and ammonium crystals. its core contains ice, rocky material but it doesn't contain land surface. It cannot support life but some of its moon might, it has over 82 moons.

7) Uranus

            The only planet in our solar system that it's axis of rotation is titled sideways (i.e) it's poles are facing the Sun researchers believe it was due to hitting of another planet. A season on Uranus last for 42 years. It was discovered in 1781.Uranus makes one trip around the Sun every 84 Earth years, often called as ice giant.

8) Neptune

             It is made up of thick soup of water, ammonia and methane. The farest planet from the solar system so it is dark, cold and ice. It's core contains ice and silicate rocks and this planet also contains rings and moons. The atmosphere is pressurized by gases where the wind reaches 1200 km/s.

Conclusion:

             We are made up of star dust, so we are really connected to space. It good to know some knowledge in space. If know some facts about space let you comment in the comment section.

                              Thank you