Galaxy Formation Process – How Did It Start?

What is the study of galaxy formation concerned with?

The study of galaxy formation and growth is largely concerned with the earliest stages of galaxy formation, the evolution of first small-galaxy galaxies, how galaxies form over time, and how the many-galaxy or Muggle galaxies evolve into separate structures. Astronomy has long been a study of the nature and composition of these massive structures.

Since the time of astronomers Hipparchus in the second century B.C., many theories have been put forth about the composition of these enormous volumes of space. One of these theories postulates that the galaxies were mostly made of gas in a highly irregular, spiraling structure. In recent years, astro-physicists have been testing this idea using a variety of techniques.

Astronomy and the study of galaxy formation over the times.

Astronomy has long been a study of galaxy formation because the existence of large-scale structures like galaxy clusters and globular large galaxies has been known for thousands of years. A variety of phenomena have been postulated to account for the creation of these structures, including contraction of the fabric, accretion, or evolution.

In order to test these models, astronomers have been studying supernovae explosions. Supernovae are extremely powerful explosions, which can produce very high quantities of energy in a relatively short amount of time. By studying these explosions, astronomers can learn more about the ingredients that go into making stars, what materials are involved in the creation of large clusters, and how galaxies form and evolve over time.

What are some observations scientists have made through their studies?

Using these exploding sessions as models of galaxy formation and how galaxies form and evolve, scientists have made further observations. These studies have shown that almost all clusters and superclusters contain a vast amount of neutral matter, which accounts for their cold temperatures and great distances from one another.

Another important result was the discovery of a diffuse galaxy formation at the center of a cluster. This was not expected, since neutral matter is thought to be too heavy to be able to be pulled into a cluster, but it was found that it does actually exist. Because of this and other observations, cosmologists have an excellent understanding of the processes through which galaxies form and function.

Tuning fork diagram in the study of galaxy formation.

The other major result from studying galaxy formation was the discovery of the so-called tuning fork diagram. Using data from the NASA/ESA (European Space Agency) Planck satellite, researchers were able to figure out the distribution of velocity within spirals and elliptical galaxies. They found that there are regions of space which are significantly faster than the rest, which they label as the “median velocity region.” This study was used to give a deeper understanding of spiral and elliptical galaxies.

Distribution of mass in elliptical galaxies.

Astronomers have also detected gaps in the distribution of mass in several elliptical galaxies. It has been found that nearly all the matter in these galaxies consists of cold, dense elements such as hydrogen. Even the most massive stars in these galaxies don’t have much cooler material in them, which is what makes them much less uniform in their structure than most normal-sized spiral and elliptical galaxies. Thus, researchers think that the lack of hot dust in these galaxies gives rise to gaps in their mass distribution.

Most of the mass in spiral and elliptical galaxies is made up of low-mass stars.

These are not born with a black hole and are very close to their parent gas giant. The process through which this occurs is called accretion. Accretion takes place when the hot gas that makes up stars heats up, forcing gas that was close to the star to fall back into the system. While this is primarily a result of gravitational pull, some of it could also come from solar system formation. When gas is pulled away from a star by its own gravity, some of it spirals inward while others push outward, which creates what is known as a solar wind.

The mass in spiral and elliptical galaxies contains many clouds of gas, much cooler than the stars. 

One of the reasons for this is because the disks of gas are much closer to their parent star, creating smaller collisions. This means that astronomers can study the effects of collisions without directly getting a close-up look at the phenomena themselves. Because clouds of gas are cooler, they also tend to evaporate faster than stars, which leaves clues for scientists studying the effects of cataclysm on the environment. Since astronomers have only observed effects on the surfaces of stars and therefore on the motions of electrons, they have not observed the evaporating effects of clouds on the gas giants.


Scientists have a variety of theories explaining the events and processes through which spiral and elliptical galaxies formed. One group of such theories believes that gas clouds were created in the intergalactic medium by dark matter halos that formed in the disk of debris that spiraled out from the centers of these galaxies.

The dark matter halos gave off energy as they interacted with radiation from the central region of the spiral and resulted in collisions with other gas clouds. Another group of researchers has a different theory regarding the formation of spiral and elliptical galaxies. They suggest that the mass of gas that existed in these galaxies contributed to the formation, rather than the interaction of dark matter halos.


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