Stars and Galaxies

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Stars and Galaxies

Stars are objects made up of dust and gas attracted to each other due to the laws of gravity.

Stars emit energy that comes from either light or heat which results in the slight heat we feel throughout the night though the sun is not present.

When the dust and gas join together the star gets so hot it creates something called a Nuclear Fusion Reaction. Which is why we can see stars that are so far away.

The life of a star typically starts as a nebula pro star.

Then it either turns into a medium-sized or large main sequence star.

Then, it expands even larger becoming huge or supergiant.

After that, it is transformed into a supernova or a white dwarf.

Finally, it becomes a black dwarf or a neutron star.

In some occasions, it may even end up as a black hole.

So now I will go over what these all are.

A nebula pro star is a cloud of conjoining gas and dust.

The main sequence star is a star that is still in the process of fueling itself with hydrogen. Different size stars can last different amounts of years.

Supergiant, giant, and large stars can last estimated millions of years.

Medium sized stars can last 10 billion supposed years. Our sun is a Medium sized main sequence star.

Small stars can last trillions of years.

If or when the star becomes a white dwarf it means it has used up all its helium and has become simply a burning core.

Once the white dwarf stops emitting light it is then known as a black dwarf.

A supernova can also go through a process where its gravity is so strong nothing can make it collapse therefore, it sucks everything in leaving nothing with any chance of escape.

(Further research: A black hole has a point where everything enters it called the event horizon)

Once inside a black hole, nothing can exit it. While everything within it will stay intact it is forever lost in what is said to be by Albert Einstein an infinite vacuum like-chasm of nothingness.

Nothingness cannot be perceived and most likely never will for once you travel (so to speak) into a black hole you are committing a form of death by universal law suicide.

Black holes are said to be one of the only things where not only is there no air for anything to survive in, but it is an infinite tunnel of nothingness.

Although stars all seem to be the same color many stars give off different colors of light.

The temperature of the star can make the light’s color vary. So can the distance and size.

A cluster of stars can differentiate the spectra causing the different star’s wavelengths to be different.

Stars can create shapes in the sky known as constellations.

In Greek mythology, most of the constellations were once people or creatures that had a legacy that earned them their place in the sky.

In the old days and even still to this day constellations are used to tell where you are especially when sailing.

The sun is one of the only stars that is not in a cluster and is in the center of our gravitational orbit.

It is not affected by gravity, for it stays in one place.

The Sun is made up of four layers; the atmosphere, the convective layer, the radiative layer, and the core.

Galaxies are parts of space made up of stars, planets, dust, and gas.

One particular well-known galaxy is the milky way; which is our galaxy.

There are many different forms of galaxies such as an elliptical galaxy, a spiral galaxy, and an irregular galaxy.