Contact Us
Sign In / Sign Up for FREE
Go to advanced search...

General Astronomy Questions - Assignment Example

Comments (0) Cite this document
The author answers the questions concerning the general astronomy. The author describes how Edwin Hubble proved that M31 is not a nebula in our Milky Way Galaxy and answers why astronomers believe that vast quantities of dark matter surround our Galaxy…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER93.5% of users find it useful
General Astronomy Questions
Read TextPreview

Extract of sample "General Astronomy Questions"

Download file to see previous pages Thanks to this work, Hubble knew that he could use the characteristics of the fluctuating light of Cepheid variable stars to help him calculate the distance to M31. His observations of Type I Cepheids led him to determine that M31 is some 2.2 million lightyears beyond the Milky Way. This proves that M31 is not an open or globular cluster in our Galaxy, but rather an enormous separate stellar system—a separate galaxy.
According to Kepler’s third law, the farther a star or cloud is from the center of the Milky Way, the slower it should be moving, just as the orbital speeds of the planets decrease with increasing distance from the Sun. Observations reveal, however, that galactic orbital speeds continue to climb well beyond the visible edge of the galactic disk (The Galaxy’s Rotation Curve is remarkably flat out to surprisingly great distances from the galaxy’s center). This means there must be a more gravitational force from the Galaxy acting on the distant stars and clouds that we can see or have taken into account.
All galaxies have their own motion relative to each other due to their mutual gravitational force. For nearby galaxies, the speed of the Hubble flow is smaller than these intrinsic velocities. Hence, some of the nearest galaxies are actually approaching us and have blueshifts instead of redshifts.
For example, if a source is observed to vary its light output substantially over a period of a week, this implies that the spatial extent of the energy producing region can be no larger than the distance light can travel in a week (Ewert, 2013).
The redshift that Hubble observed, caused by the expansion of the universe, is properly called the cosmological redshift. In other words, the photons that we observe from galaxies in other superclusters are all redshifted because space is expanding.
The Doppler redshift results from the relative motion of the light emitting object and the observer. ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(General Astronomy Questions Assignment Example | Topics and Well Written Essays - 1750 words, n.d.)
General Astronomy Questions Assignment Example | Topics and Well Written Essays - 1750 words. Retrieved from
(General Astronomy Questions Assignment Example | Topics and Well Written Essays - 1750 Words)
General Astronomy Questions Assignment Example | Topics and Well Written Essays - 1750 Words.
“General Astronomy Questions Assignment Example | Topics and Well Written Essays - 1750 Words”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF General Astronomy Questions


...might have ended up with a very different way of keeping track of time, and we most probably would have called it something other than a month” (Miles & Peters, 2001). The Christian celebration of Easter is calculated by determining the first Sunday following the first occurrence of a ‘full’ moon subsequent to the beginning of the Spring Equinox. The reason for this is that Christians had traditionally used the light of the ‘full’ moon to aid in their pilgrimage to their holy lands for Easter. Though the moon is the closest object to Earth and has been explored by man, questions remain regarding its exact origins and whether or not life ever existed on or within it or if it could sustain life. It was discovered more than...
5 Pages(1250 words)Research Paper

General Questions for Marketing

...Marketing entails the 4 Ps and the C for in the middle. Describe in detail and use examples showing why companies must put more and moreemphasis on the customers. According to Dick Lee (n.d.), “putting the customer in the middle of the business circle” will determine the marketing orientation needed for the company, in order to exceed customers’ satisfaction (cited in Thompson, n.d.). International companies of today such as General Electric, Ford, and Procter & Gamble are becoming customer-oriented to have sustainable competitive advantage in terms of competition and long-term profitability. In other words, the customer is their boss and their superior. Therefore, a marketing orientation that covers all four directions...
6 Pages(1500 words)Essay


...?Studying the Sun The Universe is a vast embodiment of unknown knowledge in which our tiny planet is apart of the giant picture, which makes individual humans insignificant in the grand scheme. However, humans are natural inquirers when it comes to the unknown. Civilization has come up with technology, which allows us to examine far and diverse celestial objects. Sometimes, however, observation cannot merely occur at just the visible level. Scientists are interested in the composition of these objects, especially stars due to the fact that nuclear fusion allows them to create denser elements in the core, which can serve as an indicator for how old the star is. One of these methods is through the use of spectroscopy. Spectroscopy... the Sun...
1 Pages(250 words)Essay

Johannas Kepler

...epistemology was profoundly concerned with astronomical practice, with methodological issues, and with the results of their application to the serious problems of late-renaissance astronomy. Kepler not only was able to ask questions in a way that no one had before asked, but he was able to provide answers to those questions that even now are worthy of continued study. From this perspective, Kepler was less the last great cosmologist of the classical tradition that includes Ptolemy and Copernicus; more was he the first cosmologist of the modern tradition. In the middle of the sixteenth century, fourteen centuries after the death of Ptolemy (c. A.D. 100-170), his Almagest still dominated...
5 Pages(1250 words)Essay


...learned from this article, began some 4.6 billion years ago 'as rock and ice particles' revolving around the sun crashing and merging spawned into a bigger which generated huge terrestrial building blocks. These matters collided to form planets, including the Earth. Amidst this chaos, another matter the size of Mars, hit our planet with the force of 'trillions of atomic bombs', adequate to liquefy it in the end. The debris rapidly assembled itself into a sphere, and since then the history of the earth began. Moreover, I learned from this article that the earth began to cool with the formation of the moon as a natural satellite but the earth remained in an extreme condition for about 700 million years. Astronomers refer...
4 Pages(1000 words)Essay


... Geological activities of earth Earth is geologically and biologically active because of two energy sources; one internal and one external. The internal energy source is earth’s molten core while the external energy source is the sun. Earth is the only planet which is having both geological and biological activities. “However, considering the fact that the solar system began as a cloud of gas and dust that was near absolute zero we might wonder where the earths internal heat came from to drive the plate tectonics.” (The Heat History of Earth) It is a confusing question for the scientific world to find out the relation between earths internal activities with solar energy. If earth’s internal activities are related to solar energy... Geological ...
2 Pages(500 words)Essay


.... Almost all of the students recognized evolution and The Big Bang Theory with their personal religion. God created the universe flawed, God created evolution to throw of unbelievers, and so forth were the main response. The American culture influenced how the students looked at science. Most children are taught about astronomy, biology, and other sciences, but religious beliefs take priority over facts. This is why Intelligent Design was introduced. Intelligent Design explains the science, but still does not refute God or higher power. Coincident or planned, the universe is a mystery. Everyday something new is discovered about space. This generation might have to face the fact that all of the universe’s...
2 Pages(500 words)Essay


...that continue to illuminate light in the universe. As a result many people all over the universe have been wondering what these stars, how far and their arrangement in the sky. These intimate questions have led to emergency of Astronomists who can help people try to understand what is happening in the universe. Unlike the ancient people who intimately familiarized themselves with night sky the modern people do not have that time thus the need for assistance from the specialists in sky matters. It is also important to note that the as the stay stars move in the sky they maintain the same pattern hence prompting the specialists come up with constellations. As far as astronomy is concerned there are...
2 Pages(500 words)Essay

General Astronomy Lab

...of Colorado at Denver Department of Physics Physics 1052 General Astronomy of the Experiment: Determining the Size of the Moon (Insert the date the experiment was conducted) Date of submission: (insert date) (Insert full names) The velocity of the earth using measured Doppler shift in spectrum of Arcturus star. Objectives To determine the velocity of the earth using measured Doppler shift in spectrum of the star Arcturus. Abstract It is possible to determine the orbital velocity of the earth by measuring the Doppler shift in a stellar spectrum. The experiment utilizes the star Arcturus which is a bright star in the sky shinning a soft orange light in the northern spring skies. Arcturus is the best choice...
2 Pages(500 words)Lab Report

General Astronomy Questions

...Describe the three main layers of the solar atmosphere and how you would best observe them. Staring from the inner side of the Sun it consists from photosphere, chromosphere and corona. Photosphere is not transparent for visible light, because of high gas density at this layer. The photosphere can be observed directly by looking at Sun with strong filters, because two layers above chromosphere and corona are transparent. The unique property of the chromosphere is the hydrogen alpha emission that gives the red color. It can be directly observed by using very spectrometers tuned on the hydrogen alpha emission length. The last outer layer corona is very large compared to previous two, has considerable smaller gas density, but much... the three...
6 Pages(1500 words)Assignment
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Assignment on topic General Astronomy Questions for FREE!

Contact Us