The Free essays given on our site were donated by anonymous users and should not be viewed as samples of our custom writing service. You are welcome to use them to inspire yourself for writing your own term paper. If you need a custom term paper related to the subject of Astronomy or The Milky Way , you can hire a professional writer here in just a few clicks.

The Milky Way The Milky Way is the home of our Solar System along with at least 200 billion other stars and planets. It contains thousands of clusters and nebulas. It is the home of nearly all the objects of Messier’s catalog that aren’t their own galaxies. The mass of our giant galaxy is somewhere between 750 billion and one trillion solar masses. The diameter is estimated to be about 100,000 light years. The galaxy has three main components: a disk, in which the solar system resides, a central bulge at the core and an all encompassing halo. The disk of our galaxy exhibits it’s spiral structure and is part of the prominent nuclear region which is part of a notable bulge/halo component. The Milky Way is categorized as a Hubble type Sb or Sc spiral. It is unclear if the galaxy has a bar in its spiral so that is why its classification is unsure. The image above is that of the spiral galaxy M83, which is thought to be similar in size and shape to our Milky Way, causing some to classify our galaxy as a Abbc type spiral. The bright ban of light seen at night, is usually what is referred to as the Milky Way. The bright plane is actually the disk of our galaxy. The disk is composed of mostly Population 1 stars, which are blue and fairly young, which range between a million and ten billion years old. The disk of our galaxy has four spiral arms, which contain interstellar matter, diffuse nebulae, and young stars and open star clusters emerging from that matter. The spiral arms are also where the active star formations take place. The arms are approximately 300 pc thick and 30 kpc in diameter. The red stars, or the older stars, in our galaxy are located in the bulge component, which is the center of our galaxy. These Population II stars are thought to be 10 billion years old. The bulge component also contains the globular star clusters. It is estimated that our galaxy has about 200 globulars, but we know about 150. These globular clusters are consolidated toward the Galactic Center. Harlow Shapley concluded that the center of the Milky Way lies at a cpnsiderable distance in the direction of Sagittarius. He came to his conclusions because of the distribution of the clusters. The Milky Way Galaxy belongs to the Local Group, a smaller group of 3 large and over 30 small galaxies, and is the second largest (after the Andromeda Galaxy M31) but perhaps the most massive member of this group. M31, at about 2.9 million light years, is the nearest large galaxy, but a number of faint galaxies are much closer: Many of the dwarf Local Group members are satellites or companions of the Milky Way. The closest of all is SagDEG at about 80,000 light years from us and some 50,000 light years from the Galactic Center, followed by the more conspicuous Large and Small Magellanic Cloud at 179,000 and 210,000 light years, respectively. The Milky Way is a gravitationally bound collection of roughly a hundred billion stars. Our Sun is one of these stars and is located roughly 24,000 light years (or 8000 parsecs) from the center of our the Milky Way. Our solar system is thus situated within the outer regions of our galaxy, well within the disk and only about 20 light years above the equatorial symmetry plane but about 28,000 light years from the Gal

Our inspirational collection of essays and research papers is available for free to our registered users

Related Essays on Astronomy

A Galaxy

A Galaxy: Characteristics, Contents and Types Galaxies are huge and contain billions of stars. They contain all of the stars of the Herzspring-Russell diagram, open cluster, emission, nubu...

read more
Masters Of The Universe

One of the few remaining mysteries of science is the black hole. When a star runs out of fuel to keep it burning, it explodes into a supernova(Intro. to Black Holes 1) After a supernova, some of ...

read more

A galaxy is a huge collection of dust, gases and stars. Formed soon after the birth of a universe and held together, a galaxy is constantly voyaging through space. Galaxies vary in size. There are f...

read more
Milky Way Galaxy Has Massive Black Hole

Kristy Pryzmont May 5th, 2001 Astronomy HWK #4 ASTR220 1. There is evidence that supports the hypothesis that the Milky Way Galaxy has a massive black hole at its core. At the center of...

read more
Milky Way

The Milky Way is the place we call home, as well as about 100 billion other stars. It looks very much like other spiral galaxies when viewed from above. There are spiral arms and a nucleus. V...

read more
Black Holes 4

Black Holes area region of space-time, which nothing can escape, even light. It is impossible to see a black hole directly because no light can escape from them; they are black. But there are good r...

read more
Visit To The Planetarium

Astronomy Second Paper 11-27-00 I attended the Wagner College Planetarium(located in Spiro Hall)on November 15, 2000 at 11:00 for research and to observe the stars, planets and our entire...

read more

Gamma-ray bursts (GRB) have left astronomers scratching their heads since the late 1960s when they were discovered by U.S. military satellites. Part of the mystery began to unlock when astronomers ...

read more

When you look at a distant galaxy, you are not only seeing into space, but far into the past as well. The light from one of the galaxies we see today actually started its journey toward Ear...

read more