Why Is Our Galaxy Shaped like a Spiral?
A galaxy is a huge number of stars grouped together. Our galaxy contains about 1,00,000 million stars. It looks like a disc with a flat cen
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When Is the Earth Nearest the Sun?
The Earth is nearest to the Sun on about the second or third day in January. The distance varies because the Earth spins round the Sun in an
When Was the Gyroscope Invented?
Any spinning object resists attempts to change the direction of its axis, the imaginary straight line round which it revolves. Thus you can
Are Days and Nights Getting Longer?
Are Days and Nights Getting Longer? The summer solstice that falls this year on June 21 marks the longest day of the year in the Northern He
How Hot Is the Moon?
The sun beats down on the face of the moon without mercy and the heat generated is almost twice that of the hottest day…