Answer all homework question using the given as help Orion Nebula questions: (Re

Question

Answer all homework question using the given as help

Orion Nebula questions: (Reading material below questions may be helpful) 1. Why is this considered a deep-sky object? 2. What type of nebula is it? (Diffuse, planetary, supernova re 3. What are the differences between the different types of nebulae? 4. Explain the colors for the Orion nebula? 5. What is currently occurring in the nebula? 6. How far and how big is the nebula? 7. What is the future of the nebula? The term "deep sky" refers to objects that are faint and require large telescopes and dark skies. We have medium-sized telescopes and the view from the city is anything but dark. Even so, we can still look at some of the brightest deep sky objects and imagine how beautiful they must look under dark skies The observing list consists of different types of nebulae. The term "nebula" comes from a Greek word meaning cloud. That is exactly how these objects appear. There are four types of nebulae that you will observe: planetary nebulae, diffuse nebulae, a supernova remnant, and galaxies. Each type is quite different and is discussed belo Planetary Nebulae. These objects are so named because they are tiny (between 2 and 100" acros tend to be circular, and are of high surface brightness. All of these characteristics are shared by planets except that the surface brightness of these nebulae never even approaches that of the planets, but they are bright as deep sky objects go. In fact, one of them in the constellation Hydra, the sea serpent, i called "Jupiter's Ghost". Actually, they are clouds of gas that are given off in the latest stage of a solar like stars life. After the star has shed it's atmosphere in an expanding shell, the star collapses to become a white dwarf. Although the star is tiny and very faint (only 1/10,000th as luminous as the Sun), its surface is very hot (100,000 K or more), which allows it to emit ultraviolet light. This ultraviolet light is capable of ionizing (stripping the electrons off of the gas in the shell that is about a light year across and slowly expanding into space. The ionized gas is then visible to an observer because the ions are constantly recombining with the extra electrons and giving off line radiation. Thus, the shell appears to glow After a brief time (about 50,000 years, the shell has expanded and the white dwarf has cooled so that it fades from view. While visible, the shell is seen usually as a circular disk or ring around the faint star Diffuse nebulae. These nebulae are called "diffuse" because they are BIG and spread-out. Many are more than a degree across and would be easily visible to the naked eye if they were bright enough They are huge clouds of dust and gas associated with star-formation regions. They are up to 100 light years across! The mighty O and B stars that are born in these nurseries are so hot (50,000 K on the surface) and luminous (100,000 times as luminous as the Sun), that they are capable of ionizing parts of the entire cloud! Thus, the cloud is lit-up by these stellar lighthouses sothat we can see it. Eventually, these O and B stars completely ionize and disperse the clouds and reveal all of the stars that were born from the cloud. They appear as a coarse collection of stars, an open cluster. The cluster eventuall disperses (after about 100 mill rough the Milky Way galaxy n years) as each star es its Page Supernova remnants. These up! About half of the star is

Explanation / Answer

1. Deep sky objects are those astronomical objects that are faint and need larger telescopes and dark skies to view them. Orion nebula is a diffuse nebula situated in the milky way galaxy. When we see it in the night sky we see it as the tiny hazy spot but it actually a vast region of stars. So Orion nebula is a deep sky object since these are faint in the sky and cannot be seen easily with the naked eyes and to see them we need telescopes and clear dark sky.

2. Orion nebula is a diffuse nebula. Diffuse nebula are those which are big and spread out. They are regions of huge clouds of dust and gas and are associated with formation of stars. They are spread more a than a degree and can be easily visible to the naked eyes if they are bright enough.

3. Planetary nebula: These are tiny, circular and have high surface brightness. They are the clouds of gas that is given off during the latest stages of the star's life. In this the star collapses to become a white dwarf. Although the star is tiny and very faint but its surface is very hot and emits ultraviolet radiation and hence seen as glowing disk around the faint star to the observer.

Diffuse nebula: They are big and spread out . They are the vast cloud of gas and dust. They appear as coarse collection of stars in an open cluster and consists of O and B stars that are very hot and luminous.

Supernova remnants: They form when O, A and B stars explode. Due to which the half of the star escape into the space as a gas clouds with very high speeds and the remainder of the mass of the star is left as a ultra dense neutron star or a black hole where the gravity is so high that even lights cannot escape.

4.Since orion nebula consists of O and B stars which are hotter and luminous stars. These stars in the nebula have temperature of around 50,000 K and luminosity of 100,000 times that of sun. Because of the presence of O and B stars the colour of solar nebula will be blue- bluish white.

5. This orion nebula consists of huge cloud of gas and dust which are colder at present. But after a periods of hundreds and thousands of years it will collapse under its own weight and become so hotter and denser in their central part that nuclear fusion reactions will take place in the core and a star is born.

6. The orion nebula consists of huge clouds of gas and dust and are related with star formation.It is a big nebula about 30-40 light years in diameter. The distance of orion nebula is 1350 light years from the earth. The mass of the orion nebula is about 2000 times that of sun.

7. When the O and B stars born completely ionizes and will disperse the clouds and all the stars will be born by the cloud. These star then appears as clusters of stars in an open cluster. Eventually this cluster will also disperses in a period of 100 million years and each star in the cluster will have its own orbit throughout the milky way galaxy.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.