Why Stars Attract us ?
When we look up at the stars on a clear night, those faraway pinpoints of light often seems to glimmer and twinkle. Twinkle, twinkle, little star, how I wonder what you are, sprint the old rhyme which express what many boys and girls through centuries have wondered. The stars do not twinkle themselves. If we could climb up above the atmosphere enclose the earth and then look at the stars, we would see them shining with a clear and fixed lights, with no doubt of twinkling. It is because we see the stars through the ocean of air, the atmosphere that they appear to twinkle.
The twinkling is caused by differences in temperature in the air. Some layers of air are hotter then others and one layer would always whirling and moving through another. These different layers of air turn the star light in different ways, and at different angels. It is this passing through layers of air of different temperatures that makes the light of the stars shaky. This unsteadiness or twinkling is similar to the trembling we see when we look at things in the distance on a hot day or during the air over a scorching radiator.
If have ever looked at the night sky cautiously, we have noticed that the stars near the possibility appear to twinkle much more then those high in the sky. This is because the light of these stars has to travel a longer trail through a thicker layer of environment, and as a result has more chance to become disturbed. We may have noticed, too that sometimes the stars twinkle much more then any other times. This is true because at some times the environment is not as still as it is at another times, or because there is not such a variation of temperature within its different layers.
Stars and planets look very much alike, although they are actually completely different kinds of bodies. Stars are huge balls of extremely hot and glowing gas, like our own sun. But the planet on other hand, are much smaller then most stars or more or less like the earth. So that’s why we define a star different from the planet.
Lovely as the twinkling of the stars is, it causes a great deal of trouble for astronomers. Even on clear nights they cannot allow to make good observations through their great telescopes. The telescopes simply magnify further the twinkling effect, so that often the stars seem actually to be dancing and jumping around.
By Rehana khan(111/10)
