This Article is the summary of NCERT book Class 6 Geography Chapter 1 which is “The Earth in The Solar System” or you can say this is The earth in the solar system class 6 notes.
We often end up watching the sky at night but have you ever wonder about why all the tiny objects disappear in the daytime? the object in the sky, what are those? etc. Keep reading and you will get to know all your doubt.
The Earth in the Solar System Class 6 notes
There are many concepts which you need to know in the further paragraphs we have all the summery of NCERT Class 6 Geography book Chapter 1 The Earth in the solar system.
Introduction of NCERT Chapter 1 of Class 6 Geography
We can see millions of tiny object in the sky at night time, some of them are bright, some are dim and they appear to be twinkling. The important question comes at this time is Why does these tiny object twinkle? Well, the answer is – because the light of these object comes to our eyes by traveling through a different medium which may have different – different density. Due to this process of traveling refraction takes place and they appear to be twinkling.
The moon which is the nearest object to the earth appears at different times, in different shapes and at different positions. We can see the full moon once in a month that night is called as Full moon night or Poornima and in once a month we can’t see the moon at all this night is called as New moon night or Amavasya.
Important terms in the Solar System
All the tiny object which appear in the night sky disappear in the day time because of the very bright light of the sun. The sun, moon and all the object shining in the night sky are celestial bodies.
Celestial bodies which are very big, hot and made up of gases. Stars have their own heat and light and they emit their heat and light in large amounts. Sun is a star but the sun looks very big compared to the all other stars because the sun is very near to the earth w.r.t. other stars about 150 million km.
when we watch the sky we observe some kind of pattern between the stars these patterns are called as constellations. There are many constellations in the sky, one of them which you may have heard of is Ursa Major or we call it as Big Bear. One of the most easily visible constellations is the Saptrishi. It is the group of seven stars. By recognizing Saptrishi we can find the Pole Star or the North Star or Polaris which was useful in getting the direction in ancient times. See the image below to understand it better.
These are the celestial bodies which do not have their own heat and light. They get light and heat from the stars. The word ‘Planet’ comes from the Greek word ‘planetai’ which means wanderers.
These are the celestial bodies which move around planets in the same way as the planet moves around the sun. There are two types of satellite – 1. Natural satellite and 2. Manmade satellite.
The Solar System
Solar system includes the sun, eight planets, satellites and other celestial bodies known as asteroids and meteoroids. It is also known as the solar family with the sun as its Head.
The Sun in The Solar System
The sun is a star. It lies in the center of the solar system. It is huge and made up of extremely hot gases. Sun is the only source of heat and light to the solar system and provides the pulling force that binds the solar system. The distance between the earth and the sun is around 149,600,000 km. the surface temperature of the sun is 5778 K.
Planets in the solar system
There are 8 planets in the solar system. According to their distance from the sun, these are – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Before 2006 Pluto was 9thPlanet of the solar. It was invented in the 1930s but after 1992 it was questioned and in 2006 the International Astronomical Union classified it as Dwarf Planet.
The Earth in the Solar System
The earth is a planet. It is the 3rd nearest planet to the sun and the 5th largest planet in the solar system. The shape of the earth is geoid which means ‘earth-like shape’. Earth is the only planet which has life on it. Earth appears blue from the space because almost 2/3rd part of earth surface is covered with water, therefore, it is called a blue planet.
The moon in the Solar System
The moon is the only satellite to the earth. There are many moons in the solar system and rotates around the planet as moon around the earth. The moon appears very big to us because it is very nearer to the earth around 384,400 km. It moves complete one rotation around the earth in 27 days and takes exactly the same time to complete one spin on its axis therefore only one side of the moon is visible to the earth. Read More about the Motions of the earth
Asteroids in the Solar System
asteroid are numerous tiny bodies which move around the sun. these are found between the orbit of Mars and Jupiter. Scientist assumes that asteroids are part of a planet which may be exploded many years back.
Meteoroids in the Solar System
These are the small piece of rock which also moves around the sun and sometimes tends to drop upon the earth. When they come towards the earth due to friction with air they heat up and called as a shooting star.
Some interesting facts about the solar system
- Jupiter, Saturn, and Uranus has rings around them.
- Light reaches to earth from the sun in around 8 minutes in spite of fact that light has its velocity around 300,000 km/s.
- Neil Armstrong was the first man who went to the moon on 21 July 1969.
The solar system is part of the milky way galaxy which is also called as ‘Akash Ganga’. The universe has millions of galaxies similar to milky way galaxy. Our scientists are trying to explore the universe day by day. The universe has no end.
I hope you all liked The Earth in the Solar system class 6 notes. If you have any doubt on this, please feel free to comment your doubt below.