This paper will talk about the Planetary Nebula. The name came from a man called William Herschel. He called the sphere shaped clouds a planetary nebula because it is round just like a planet is. The word Nebula comes from the latin word Nebulae or Nebulas which means cloud. This paper will also consist of different information about the stars and life “cycle” of the stars. A Planetary Nebula is formed when a star's outer layers are blown off and they expand into space which would soon form the Nebula. A Nebula is the shape of a bubble or a ring. The reason why a Planetary Nebula is so colorful is because of the remains of stars that are left behind whenever a the star's outer layers are blown off. Unlike the name of the Planetary Nebula …show more content…
It is the life stage that comes right after the stage called Red Giant. It is also right before the stage called white dwarf. The Planetary Nebula is the outer layer of a star that's lost when a Red Giant transforms into a white dwarf. A Planetary Nebula is basically a cloud of gas and dust that has formed in …show more content…
It is considered a nursery for stars because that is where the stars are. You might also ask what is a star? Well a star is very big exploding balls of gas, made up mostly of hydrogen and helium. Our sun is also one of the biggest stars. Nebulas are where the stars are born. A Nebula is a very important part of the life cycle of a star. Nebulas make very unique stars that we have in our galaxy. Without Nebulas we wouldn’t have as many stars as we have now and who knows if we would even have stars. This is why a Nebula is very important to the life cycle of a star. There are two different kind of nebulas, Planetary and Stellar. Most Nebulae are about a hundred of light years in diameter. Some objects that are stellar can be considered a Nebula but it will be four different kinds. There is DIffuse Nebulae, Emission Nebulae, and Reflection Nebulae. Diffuse Nebulae is that they have no boundaries and Emission and Reflection Nebulae are based on how they react with light. This is what my essay was about. At first you didn't know much about the Planetary nebula but now have you learned some facts. You learned what a PLanetary Nebula is and what it is made of. You also learned why the Planetary Nebula is important to the life cycle of a star. You also learned what stars are and what they’re made
The Lagoon Nebula featured as Nasa’s astronomy picture of the day was photographed by John Nemcik using various filters to capture the light emitted by the Hydrogen, Sulfur, and Oxygen. While photographed showing beautiful vibrant, eye-catching colors, the Nebula would appear naturally appear gray to human eye due to poor color sensitivity existing at low-light levels (spacetelescope.org). The Lagoon Nebula is home to the formation of new stars, as well as several other interesting phenomena such as Bok globules, and the hourglass nebula. It is these regions of the nebula that make it a continuous area of interest and study for astronomers.
One of the main types of nebulae is called a reflection nebula. The particles around stars are about the same size as the wavelength of visible light and therefore they are able to reflect the visible light being emitted from the nearby star. However, most of the time these clouds of dust have a bluish color to them and that is due to the fact that the particles are at about the same size as the blue wavelengths and it is harder for them to interact with the longer red or orange wavelengths. The best reflections nebulae come around stars that are cooler than 25000 K. Another main type of nebula is an emission nebula and this type derives its light from the UV radiation being emitted from a nearby star. The light from the starts exites atoms in the dust cloud which in turn emit light. . When describing what happens to light coming from a star there are two things that refer to it. One would be extinction and this happens when the dust cloud around the star is so dense that the light cannot pass through it and it appears as if the light just stops or makes the star appear dimmer than it really is. Another one would be reddening and this happens when the dust particles in the interstellar medium pass the longer red or orange wavelengths. This process gives the clouds a reddish color and overpowers the blues, greens , and violets.
In this essay I will answer my question of ‘why does Saturn have rings’. I will also describe saturn and its attributes. Towards the end of the essay I will speak about what Saturn having rings will mean to us in the near future.
Hubble, Edwin. 1929, "A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae" Proceedings of the National Academy of Sciences of the United States of America, Volume 15, Issue 3, pp. 168-173
lifetime. Some of Edwin Hubble's greatest accomplishments were: Edwin Hubble proposed a classification system for nebulae, which are fuzzy little patches of light that are up in the sky. He discovered a variable star, called the Cepheid. It is located in the Andromeda Nebulae. Edwin Hubble settled decisively the question of the nature of the galaxies. Edwin Hubble's distribution of galaxies was determined to be homogeneous in distance. Edwin wanted to classify the galaxies according to their content, distance, shape, and pattern of brightness. By observing redshifts Edwin saw that galaxies were moving away from each other at a rate constant to the distance between them (this is known as Hubble's Law).
Stars are born and reborn from an explosion of a previous star. The particles and helium are brought together the same way the last star was born. Throughout the life of a star, it manages to avoid collapsing. The gravitational pull from the core of the star has to equal the gravitational pull of the gasses, which form a type of orbit. When this equality is broken, the star can go into several different stages. Some stars that are at least thirty times larger than our sun can form black holes and other kinds of stars.
Nebula away so that it can avoid certain things. In the short story, “The Star,” the priest stated,
Research News Planetary Scientists are Seeing the Unseeable Richard A. Kerr Science, New Series, Vol. 235, No. 2 -. 4784. The. Jan. 2, 1987, pp. 113-117. 29-31. The 'Standard' of the 'Standard'. Stable URL:
Supernovas are explosions from old stars at the end of their life cycles. Their explosions are the largest and most energetic things in the Universe and can outshine their entire home galaxies. Supernovas can also provide beautiful viewing as well. Anyone in 1572, for a few weeks, could look up at the sky and see a bright “New star” in the sky.
McDaid, Liam . "44 Common Misconceptions About Astronomy." Sacramento City College. N.p., n.d. Web. 12 Nov. 2013. .
If the nebula is dense enough, certain regions of it will begin to gravitationally collapse after being disturbed. As it collapses the particles begin to move more rapidly, which on a molecular level is actually heat, and photons are emitted that drive off the remaining dust and gas. Once the cloud has collapsed enough to cause the core temperature to reach ten-million degrees Celsius, nuclear fusion starts in its core and this ball of gas and dust is now a star. It begins its life as a main sequence star and little does it know its entire life has already been predetermined.
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. Galaxies also contain billions upon billions of stars and their diameter can range from 1,500 to 300,000 light years. That’s huge! The Milky Way, the galaxy in which we live in, is one of about 170 billion galaxies in the observable universe. Our Sun is one of the billions of stars in our galaxy, and our eight planets revolve around this star in only a tiny part of our galaxy. “The Earth’s solar system is believed to exist very close to the Galaxy’s galactic plane, due to the fact that the Milky Way essentially divides the night sky into two virtually equal hemispheres” ("All About the Milky"). It definitely makes people second guess the fact of there being life on other planets.
Sidney, Philip. "Astrophel and Stella." Online. Renascence Editions. U of Oregon P. 6 Apr. 1999. Available HTTP: darkwing.uoregon.edu.
One thing us as humans have never been able to fully understand is astronomy. Always having an unexplained mystery, astronomy also has served as a way to keep time and predict the future. The word “astronomy” is defined as the study of heavenly bodies, meaning anything in the sky such as stars, galaxies, comets, planets, nebulae, and so on. Many people, if not everyone, is amazed by the night sky on a clear, moonless night.
The idea behind the Solar Nebular Hypothesis is that the solar system was condensed from an enormous cloud of hydrogen, helium, and a few other elements and rocks. Around five billion years this cloud of materials began to spin and contract together into a disk shape under their own gravitational forces. The particles started combined together, protoplanets, to eventually form planets. A great mass of the material eventually began to form together, protosun, and make up the sun.