Majestic Barred Galaxies

Halos are the gaseous atmospheres of galaxies. The properties of these gaseous halos control the rate at which stars form in galaxies according to models of galaxy formation, explained the lead Nicolas Lehner. The gargantuan halo is estimated to contain half the mass of the stars in the Andromeda galaxy itself, in the form of a hot, diffuse gas. If it could be viewed with the naked eye, the halo would be 100 times the diameter of the full Moon in the sky. This is equivalent to the patch of sky covered by two basketballs held at arm's length.

After that the astronomers classified these galaxies into two main types. Flat, rotating, disc-shaped galaxies and large, oval-shaped galaxies with a swarm of distorted stars.

The thin bands are generally young with “spiral arms, young stars, giant molecular clouds”(University of Cambridge, 2014). The thick band is older since it has stars with a lower metallicity. Given the study done in Chile, there were several conclusions made. First, that the “thin” disk stars all had similar metallicity even though there ages spanned over 8 billion years. Second, that stars older than 9 billion years had a very low metallicity, and this was described as a “steep decline”(University of Cambridge, 2014). However, given these two conclusions, the study also found that there are stars that are young with a low metallicity as well, meaning that the study is not completely cut and dry, so to speak. There is no distinguishable evidence that would allow researchers to definitely conclude the existence of a thin and thick disk or the creation of the Milky Way from the inside out.

You are probably wondering where did these things come from and how are they formed? Well I am about to tell you, Low mass stars are formed when all the helium has fused into carbon, then the core collapses. As the star collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers a massive star that will undergo a supernova explosion. Then when the low mass star is done forming after billions of years they start to become giants.

The Milky Way is a barred spiral galaxy with a diameter between 100,000 and 180,000 lightyears.

Active Galactic Nuclei (AGNs) are very luminous and dense regions in the center of galaxies believed to host Super Massive Black Holes (SMBHs). The electromagnetic radiation sent out from AGNs is conjectured to come from matter that the SMBHs accrete which then takes the form of an accretion disk circling the black hole. These accretion disks are best approximated with an irregular density and temperature distribution made up by very hot gas and plasma~\citep{skadowski2015global}.

The Milky Way is flat and disk shaped collection of gas dust and stars. It is 100,000 light years across and 7,000 light years thick. The Milky Way’s dish has two major spiral arms and two minor ones that comes together in of the galaxy. In the center of the disk is a cylinder bar that has a collection of old red stars. The Milky Way is visible on a moonless night only if you are in very dark spot where you would see a faint fuzzy glow in the sky. If Sagittarius and Scorpius are visible you notice it more. Galileo noticed that the Milky Way was made up of thousands of stars that were so close together, that you could see it with the naked eye and blend together to create a glow.

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

Third, the observations of Novae. Shapley said that in certain lights obervées "novae" seen in the spiral nebula, implies that there is more light was far more nebulous. Curtis noted that these abnormal events pourait be a member of another class called supernovae today, they are referred to as during the debate "New Class".

Corona Borealis Galaxy Cluster (Abell 2065) is highly concentrated with galaxies. About 400,000,000 galaxies are in this.

This galaxy, among many others in its galaxy clusters, has been a designated area for astronomers. The Comet Galaxy has a core made up of millions of stars. In pictures form the Hubble telescope, the galaxy is highlighted by a fluorescent blue in the center of it.

The Tadpole Galaxy is a disrupted barred spiral galaxy that is 420 million light-years from Earth towards Draco. It has a trail of stars about 280,000 light-years long and big, bright blue star clusters. Numerous young blue stars and star clusters, created by the galaxy collision, are seen in the spiral arms, as well as in the long tidal tail of stars. Each of these clusters contains up to a million stars and will redden with age to become in time globular clusters similar to those found in essentially all halos of large galaxies, including our own Milky Way. It is said that a more compact intruder galaxy crossed in front of the Tadpole Galaxy and was slung around behind the Tadpole by their mutual gravitational attraction. During this encounter,

Most lenticular galaxies are the remains of old spirals that have lost their gas. Most elliptical galaxies are the remains of several spiral galaxies that have collided. Usually, galaxy clusters are filled with hot gas that is spread throughout the cluster. Yet, there is no hot gas out in the field. When radiation from the hot gas hits a spiral galaxy, it removes the spiral galaxy and becomes converted into a gas-poor lenticular galaxy. Spiral galaxies cannot survive the hot gas environment.

The Milky Way is a galaxy. The Milky Way measure 100,000–120,000 light-years in diameter, it is home to planet Earth and the other planets that we all know. The Milky Way is warped. the Milky Way is a disk about 120,000 light years across with a central bulge which has a diameter of 12,000 light years. The Milky Way has over 200 billion stars. It also has enough gas and dust to make billions more. The Milky way galaxy was made from other galaxies by eating them and that's how they got there shape. We all have seen pictures of the Milky Way but they are either pictures of another galaxy or a talented artist. The Milky Way has a supermassive black hole at the center. The center of our galaxy is called Sagittarius A, it's a massive source

There are many types and morphologies of galaxies. First, there are elliptical galaxies which have elongated structures, like an ellipse. An elliptical galaxy on the Hubble Sequence, a classification system for galaxies, either range from E0, being nearly spherical, or up to E7, being