Planetary Nebula -- Part 2 to Part 6

in #space7 years ago

 This  type of nebula is formed when the star ages and advances in age, burns  all its hydrogen and becomes helium at its center. Helium is also  converted into carbon and oxygen. Nuclear reactions reach the end in the  center of the star, while helium continues to burn in the outer crust

This  causes the star to expand and enlarge in size and become the outer  layers of the star is unstable because of it and lose the star mass in  the form of strong star winds, and this imbalance causes the expulsion  of the important part of the mass of the star from the layer that  extended and remains the heart of the star is very hot and becomes a  small star in the center of the nebula, with the High Aqh

This  type of short nebula may last for several thousand or tens of thousands  of years and then dissipate. The star will cool and turn into a white  dwarf. This type of nebula has no relation to the planets but is known  by this name because it is seen in small telescopes such as planets. planetary within 5 billion years

%95 Of the stars we see in our Milky Way galaxy will eventually become  planetary, including the Sun, and the other 5% of the stars, those with a  mass of more than eight times of our Sun, will end their lives as a  coupernova.
The term "planetary nebula" is an old name and has no relation to the planets, but it is a mistake in naming. This name appeared more than a century ago when the binoculars used at  the time were small. They happened to see the nebula as a round,  green-colored object. I thought it was like a planet influenced by their  view of the planet Uranus.
In  any event, planetary nebulae were not made of the planets, and there  are no visible planets within this nebula, which have nothing to do with  planets. It is rather the gaseous substance and dust that has been expelled from a star who has aged at age before his death. The  best name for this nebula is the "evils of expulsion", as they are  drawn out of smoke, such as smoke emitted from a burning ember

The end of the sun is a planetary nebula

The  sun produces all its heat like any star inside it, in the center, this  heat warms the earth and protects the sun from the collapse of the  attraction inside. The fuel used by the sun or any star is hydrogen, where hydrogen nuclei are converted into helium, producing that enormous heat
In  five billion years, hydrogen fuel will run out into the sun, and the  net helium will almost stay. Gravity will force the depressed heart to  contract and compress it and become warmer and warmer than before. These high temperatures will ignite helium ash and result in carbon nuclei and increased temperature rise. And  there will be a second release of heat and be violent and stormy,  increasing the impact of lighting the surface of the sun a thousand  times. During that period, the heat causes the outer layers of the sun to inflate the so-called red giant
This red giant will swell and expand so that the orbits of both the Mercury and Venus planets are within this expansion. It  will happen that both sunrise and sunset on Earth will take a few  hours, and the sun will appear bright red and huge to fill half the sky.  Water in the oceans will boil, evaporate and leak into outer space with the atmosphere. Acute radiant heat will transform the surface of the earth into a thick layer as solid as pottery. In the sense that the earth will turn into hell with which life is impossible in any form.
Helium  does not last long, and in less than a few hundred million years, after  helium is transformed into non-combustible carbon, the star's heart  suddenly halts (in thousands of years), the current star mass (about a  million degrees) Per teaspoon of tea) and become a ball in like the size of the ground. This remaining ball is called a white dwarf
During  the final stages, the outer layers of the sun will begin to collapse  toward the center at home, but the base material will ignite as it is  going inward, causing the external surface to malfunction. In  the end, about 40% of the sun's mass will be released into space,  spread through the solar system and beyond. The outer layers will  continue to separate deeper and deeper layers into clusters of spherical  bubbles, which may eventually form in the form of a giant halo. Which is observed from afar in the form of a nebula, is a planetary nebula.
When that process ends, the former sun's heart appears as a white dwarf through a curtain of the expelled material. The  active light emitted from the white dwarf will interact with the  electrons of atoms within the gas cloud formed, leading to the  appearance of the nebula in its brilliant colors

  image source   1

 Nebula is the birthplace of stars  -- Part 1  

Planetary Nebula   -- Part 2  The Post has been added 

Emission Nebula   -- Part 3 

Reflection Nebula   -- Part 4 

Dark Nebula   -- Part 5 Supernova Remnants   -- Part 6 

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