The Life and Death of Stars - PowerPoint Presentation Example

The most prominent stars were grouped and the brightest of them all were given names. The grouping of stars also helped astronomy to track the motion and positions of other heavenly bodies. It was by this tracking that an idea came up of creating calendars where they used the motion of the sun against the background stars. The widely used calendar in the world, The Gregorian Calendar, was based on the angle of the earth’s rotational axis and the sun. How was the star formed according to astronomy?

All stars are born from collapsing dust and cloud of gases which are concentrated at temperatures for a period of years. When the protostars settle down at average temperatures to form a main-sequence star. For most of its life, the stars use nuclear fusion which is generated through the fusion of hydrogen atoms at the core of the main sequence star. The reason behind ganging up of stars in pairs or multiple around the milk way may be because of the spinning dust and clouds of collapsing dust causing a break up of two or three blobs.

During the formation of a star, not all gas and dust is used up, The remaining materials become planets, comets, asteroids or may remain as dust. For a star to be as big as the sun it requires 50 million years from the beginning of the collapse till adulthood, where else our sun will remain in that state for 10 billion years. The helium formed in the interiors by the reaction of hydrogen fuels provides pressure which keeps the stars from collapsing under their own weight and produces energy that keeps on shinning.

When the helium at the core of the star is nearly exhausted, all-natural occurring elements heavier than Helium are formed via supernova nucleosynthesis or stellar nucleosynthesis. Supernova nucleosynthesis occurs when massive stars explode while stellar nucleosynthesis occurs during their lifetimes. During the end lifetimes of the star, there is degenerated matter is also formed. For instance, 1 gram of the mass converted entirely to energy would equally produce an explosion rough of 22,000 tons of TNT.