Short Essay on Stars

The stars are objects like the sun, they are very hot and have their own light. Every star is a huge hot gas, and a big flame is burning. The stars are composed of huge hydrogen clouds, some helium and dust. In all stars (including the sun), hydrogen atoms are always converted to helium atoms, and in the process a large amount of thermal energy and nuclear energy of light energy are released. It is this light that shines a star. Therefore the star is a hydrogen energy nuclear reactor and itself is very large.

There are billions of stars in the sky, but on a clear moonless night, only about 2,000 stars can be seen with the naked eye. Every star is very big. They are small because they are far from us. The stars flicker at night. In other words, the intensity of those lights will increase or decrease. Stars are classified by physical characteristics such as size, color, brightness, temperature. The star located above the Earth's north pole and all the other stars seem to rotate around it. It is called a polar star. The name of the Indian polar star is Dhruva Tara. The polar star seems to be stationary in the sky, and its position does not change at all. It is observed that all stars except the polar star seem to move from the east to the west.

This can be explained as follows. It turns out that the earth itself rotates from the west to the east about its axis, so that the star seems to move in the opposite direction from the east to the west. Therefore, the apparent motion of an empty star is due to the rotation of the earth on its axis. As we are on our own, the earth seems to be stationary for us, the stars appear to move through the sky. Polar stars appear to be stationary, they are on the axis of rotation of the earth and do not change over time.

The sun is also a star. It is the star on which the earth and other planets rotate. The sun is small and has an average brightness compared to millions of other known stars. Because the sun is closer to the earth than any other star it looks big and bright. Therefore, the star closest to the earth is the sun. As you approach us, the sun will not shine like any other star. The sun is very hot. The surface temperature of the sun is about 6000 ° C, and the temperature in the center is about 20 million ° C.

The very short distance between stars means that all other stars are only a few weeks away from them. This provides a great opportunity for intellectual civilization to relatively easily migrate and colonize other galaxies. Being an interstellar species is a way to survive in a large space and time unacceptable. Using geometric methods, the whole globular cluster can form colonies within thousands of years. This affects detection of intelligent life forms in globular clusters and can be tested relatively easily.

Unlike the relatively short lived sun of 5 billion years ago, all the globular clusters known for the Milky Way are over 10 billion years. With smaller, darker stars, they will still last longer than all sunlike stars, and the planets around them will flourish with life as an interesting possibility. Globular clusters also do not have huge stars, and those supernova / gamma ray bursts can lead to mass extinction. The very short distance between stars means that all other stars are only a few weeks away from them. This provides a great opportunity for intellectual civilization to relatively easily migrate and colonize other galaxies. Being an interstellar species is a way to survive in a large space and time unacceptable. Using geometric methods, you can colonize the entire globular cluster in thousands of years.