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How many planets are there in the Solar System? 

Important Questions on Our Earth

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Science>Physics>Our Earth>Earth and the Solar System

Which satellite is used for geographical survey?

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Science>Physics>Our Earth>Earth and the Solar System

Why do tail of comets formed, when it comes closer to sun?

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Science>Physics>Our Earth>Earth and the Solar System
Write the general characteristics of Jovian planets.
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Science>Physics>Our Earth>Earth and the Solar System
Write the name of Red Planet.
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Science>Physics>Our Earth>Earth and the Solar System
Earth day is celebrated on:
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Science>Physics>Our Earth>Earth and the Solar System

What is the name of 400 km thick bright layer around the sun?

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Which of the following is not a natural satellite?

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Science>Physics>Our Earth>Earth and the Solar System
Write the name of the first astronaut. Which facilities are available to solve the problem of food and living in Weightlessness on International Space Station.
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Name the first artificial satellite sent by Russia in space.
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Mention any two achievements of Hubble Telescope.

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Science>Physics>Our Earth>Earth and the Solar System
The planet nearest to the Sun is
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The figure shows an elliptical path ABCD of a planet around the sun S such that the area of triangle CSA is 14 the area of the ellipse. (see figure) with DB as the major axis, and CA as the minor axis. If t1 is the time taken for the planet to go over path ABC and t2 for path taken over CDA then:

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Science>Physics>Our Earth>Earth and the Solar System
Write any two characteristics of Jovian Planets.
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Science>Physics>Our Earth>Earth and the Solar System

The earth takes 1 year to make a complete revolution around the sun whereas Pluto takes nearly 248 of our earth years to orbit the sun. What is the main reason for this?

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What is the name of the natural satellite of the earth? How would have this natural satellite originated? Mention its two importance for earth.
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Science>Physics>Our Earth>Earth and the Solar System
Which is called Earth's satellite?
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Science>Physics>Our Earth>Earth and the Solar System
How many planets have rings around them?
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What is an artificial satellite? Name any two types of artificial satellite and state their functions.

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An artificial satellite of mass m is moving along an elliptical path around the earth. The areal velocity of the satellite is proportional to
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Science>Physics>Our Earth>Earth and the Solar System
Kepler's third law states that the square of the period of revolution T of a planet around the sun is proportional to the third power of the average distance r between sun and planet i.e., T2=Kr3, here K is constant. If the masses of sun and planet are M and m respectively then as per Newton's law of gravitation force of attraction between them is F=GMmr2, here G is gravitational constant. The relation between G and K is described as: