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What's the difference between stars and constellations? In a nutsell, Stars are Hot body of mostly hydrogen and helium gases. They give off heat and light.The Sun is an example of A Star, whereas Constellation,when seen from Earth, is a group of stars that forms a shapes or pattern.Ursa major is an example of constellation. In a scientific sense, Stars are huge bodies of glowing gases(mostly hydrogen and helium).They are not star-shaped. They Give off tremendous amount of heat and light. The Distances of stars are expressed in terms of light year(1 light year=Distance travelled by light in one year).The color of A Star is determined by its temperature.The hottest star is of Blue color, which can go upto 30,000 k(kelvin) And the coolest is Red star,which can go upto 3,000 K. The Sun is a common example of A Star. Constellation is a configuration of stars forming different patterns or shapes. Astronomers have divided the sky into eighty-eight constellations with a fixed boun...
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Doppler effect What is Doppler effect ? Have you ever noticed that when any vehicle,such as,cars,motorcycle etc when they approach you,you hear a high sound and when they go farther from you,you listen a lower sound.But why this happens?The answer is Doppler effect.But what is Doppler effect?When an vehicle Approachs you,it travels a small distance closer between sending out each sound wave.That's why,you hear a high pitch.And when it goes farther from you,it travels a small distance away between sending out each sound wave.And for you it makes a lower pitch.It was first discovered by a mathematician and physicist Christian Doppler in 1842.This effect also happens to light,where it is called red-shifted.
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