NCERT Class 6 Geography Chapter 1: Earth in Solar System Complete Notes Part 4

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Earth in Solar System

Moon

  • Natural Satellite – Celestial body that moves around planet

  • Moon’s Diameter – 1/4th of earth (5th largest natural satellite)

  • Tides: Gravitational attraction between moon and earth

  • Ganymede – Largest moon in Solar System (Jupiter)

  • Titan – 2nd largest moon in solar system (Saturn)

  • Distance from earth: 384,400 km

  • Sidereal Month: w.r.t. to distant stars, 1 revolution relative to stars – 27.32 days

  • Synodic Month: w.r.t. to Sun, time taken by moon to reach the same visual phase - 29.53 days. Longer period is required to achieve similar alignment of Earth, the Sun, and the Moon.

  • Chandrayaan-I and II, TeamIndus (Unmanned spacecraft to moon)

Moon is one of natural satellite of the earth. There are many moon’s exist. The most important are is largest moon of the solar system is moon of Jupiter which is known as Ganymede.

Then you have second largest moon of the solar system which moon of Saturn is which is known as a Titan.

Earth’s moon is a 5th largest satellite. Now moon’s Diameter is 1/4th that of the earth.

Now sidereal months are with respect to the star you have 1 complete revolution with respect to the star that complete in 27.32 days. However it we talk about the synodic month it is with respect to the sun. So, it time taken by the moon to reach the same visual face. It takes a much more than the sidereal month. So you have synodic month. That exist in 29.53 days.

I know recently their have various mission to moves India’s first mission known as Chandrayaan-I and then Second is getting be ready Chandrayaan-II. Then you have recently project which TeamIndus which aims then to by 2018. India will host tricolor in 2018 by TeamIndus which is a kind of Unmanned spacecraft which be released to moon.

Other Important Terms

  • Asteroids are small Rocks that exist between mars and Jupiter. They are small Rocky elements. The largest of Asteroids is a Ceres. Which is one of dwarf planets as we discuss.

  • Meteoroids are small particles that move around sun. and they can fall on to the earth, when they fall on the earth there is friction produced because of the friction there is flash of light that is generated.

  • Comets are the ice body which move due to solar radiation and tail always point away from sun.

  • Pulsars are highly magnetic rotating bodies or neutron stars.