Planetary Nebulae Clouds

After a time, the hydrogen runs out almost completely, and it collapses. New reactions begin to take place in the core and these reactions cause the star to expand rapidly. As the stars begin to deplete their new fuel, they switch to others. New elements are formed in the cores of stars but they become too heavy. The star has reached its end growth. When it reaches the end, a tremendous amount of energy is released and it begins to shed its outer layers, the gravity is too weak hold onto them anymore. Once the layers are removed, in the stars place is a fiery core called a planetary nebula. Eventually, the core runs out of fuel and it collapses. This star is now in a very dense state, and is called a white dwarf. Eventually, the white dwarf cools until it no longer shines. This dead star is called a brown dwarf.More massive stars, however, have more violent ways of dying. Some stars turn it into a supergiant. Supergiant stars are extremely bright, and are extremely large. Supergiant stars cores, can collapse violently and suddenly. This collapse causes a tremendous explosion, called a

The Nebular hypothesis began as a cloud. The cloud starts to compact as it cools. The Law

1. Why is the phrase “nursery of stars” an appropriate way of describing interstellar matter (nebulae)?

Planetary nebula are formed in the outer core of the star that are vanished when the star of the Sun’s mass changes from a red giant to white dwarf. At this stage all the energy from the star fades away losing layers and forms a complex structure.

The life cycle of the star is a long process that has taken place for billions of years and will continue to take place long after our star is no longer in existence. In this essay I will be explaining the magnificent process of how a star is first born till the end of its life cycle. First, I will be explaining how the star is first formed in all its beauty big or small. Then, I will be explaining the path of an average star like our own sun will take. After, I will be explaining the journey of a massive star in all its glory till its destructive end. All stars are first formed in clouds of gas called nebulae, turbulence deep within the nebulae causes cores to form as the mass begins to grow the nebulae begins to collapse upon itself due to

When a sun like star like the sun sheds most of it’s mass it is called a planetary nebula.

Several unresolved problems remain concerning the Orion Nebula. The fate of the protoplanetary disks, for example, is presently impossible to predict. Without a more detailed understanding of how planets actually form, it cannot be assumed that the events within the Orion Nebula are analogous to the events that led to the formation of the planets in the solar system. Furthermore, the detection of water in the nebula has revealed the need to revise the theory of star formation to

The Trifid Nebula, M20, (at the upper right in the image) is a “rare combination of an emission and reflection nebula” (Koprolin). This colorful contrasting nebulae is 5,000 light-years from Earth and 40 light-years across. A star forming region in the plane of our galaxy, the Trifid illustrates three different types of astronomical nebulae; red

Approximately 1,000 years ago the pattern of mass loss suddenly changed, and the Cat's Eye Nebula started forming inside the dusty shells. It has been expanding ever since, as discernible in comparing Hubble images taken in 1994, 1997, 2000, and 2002. The puzzle is what caused this dramatic change? Many aspects of the process that leads a star to lose its gaseous envelope are still poorly known, and the study of planetary nebulae is one of the few ways to recover information about these last few thousand years in the life of a Sun-like

As a comet hunter Charles Messier came across what are known now to be galaxies, nebulae, planetary nebulae and star clusters. With help from his assistant Pierre Méchain, Messier composed a list of them. Messier done this to make it easier to differentiate between the comets they were looking for and other objects. The list is made up of the objects that they could see from the north celestial pole to a celestial latitude

The Nebula is the first stage which the star is born. The Nebula is actually a cloud of hydrogen gas and dust in space. There are a couple different types of

Within the constellation of Orion is what appears to the human eye as a hazy star, but is in fact the Orion Nebula, a cosmic cloud composed of dust and brightly glowing gas around 20-30 light years in diameter. This nebula, often called M42 or NGC 1976, is one of the most studied stellar ‘nurseries’ and is located in the Orion constellation, a part of the ‘sword’ hanging from the three-starred ‘belt,’ approximately 1,500 light years away from Earth.

First, I will discuss protostars. A protostar is a very young star that is gathering gas from a giant molecular cloud. “The protostar phase of stellar evolution lasts about 100,000 years”. (www.universetoday.com) As time goes on, pressure and gravity increase, which therefore forces tho protostar to collapse down. The energy released by the

Before a star is born, massive clouds of dust and gas are pulled together by gravity in space, called a stellar nebula. These massive clouds are pulled to the center of the collapse into a number of points, or course within them. In the middle of the core, several events

A galaxy, also called a nebula, consists of billions of stars, interstellar gas, dust, and dark matter which are all bound to form a massive cloud in which we live in. Although it cannot be very well explained, dark matter makes up at least 90% of a galaxy’s mass.