how many planets are found till now?
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Why countdown while firing a aeroplane?
do alliens really exist?
Equatorial and polar diameter.
Explain the Eclipses ?
Explain the moon?
What is lunar eclipse?
What is equatorial and polar diameter?
Magnetic effect of the earth.
Explain the Astronomical telescope ?
What is solar eclipse?
Explain shape of the earth?
What is eclipses?