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Earn 100

The planets move around the sun in fixed track known as  

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Important Questions on Our Earth

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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
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
Earth day is celebrated on:
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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:
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Science>Physics>Our Earth>Earth and the Solar System
When we cannot see the moon, it is called _____.
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Explain New Moon.

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In which of the following phases is the Moon not visible at all?
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The _____ shows different phases.
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What is the shape of the Earth’s orbit around the Sun?
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Identify the movement of the planets which causes day and night.
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When the shadow of the Moon falls on the Earth it is called a _____.
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The time taken from one New Moon to the next is 26 days.
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Fill in the blank with a suitable word:

When we can see more than half the moon, then it is called _____ (gibbous/full) moon.

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Does the Moon actually change its shape every night?
 
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Observe the spinning top as shown in the image. Which movement of the Earth is represented by this top?
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During lunar eclipse, _____ is in the middle.
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Name the following.

Three planets in the solar system.

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Solar eclipse occurs on a _____ (new moon/ full moon) day.
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Why does not a lunar eclipse occur on all full moon days? 
 
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Science>Physics>Our Earth>Earth and the Solar System

When the Moon is completely hidden, it is called _____ (partial lunar eclipse/total lunar eclipse).