Resulting Structures of Galactic Collisions
In the visible universe, there is one type of event that is often responsible for a good deal of the varied phenomena we observe across the cosmos. A type of event whose effects are both destructive and creative. This event is the interaction of two or more galaxies. The results of a galactic interaction are so varied that each event is unique. Therefore, only a select few examples will be described in the following pages.
An examination of the term “galactic interaction” does not immediately convey much in the way of understanding as to exactly what happens during one of these events. The problem is that the word “interaction” is fairly ambiguous, yet it must be so because two galaxies can interact in so many ways that literally every interaction we observe is a unique event (depending on how close one looks at the details). Changing the mass ratios, the angle of impact, or the morphological type of the progenitor galaxies can greatly influence the nature of the system after the interaction has played itself out, as we shall see.
However, galactic interactions do often share many characteristics. The most notable feature associated with interacting galaxies is often the “starburst” phenomenon. A starburst is an extremely high rate of star formation over part or all of a galaxy over a cosmologically short period of time (possibly a few billion years as opposed to several billion years). Galaxy interactions cause gravitational instabilities in interstellar gas clouds, which compress the gas in the clouds and trigger star formation (Mouri 2003). When astronomers look at an ongoing starburst in a distant galaxy, they see the starburst as a bluer region than the surrounding parts of the host galaxy. That is due to the extremely hot and energetic, yet short lived, O-type stars produced in the burst, which outshine all of the other stars being born around them as well as the older, redder stars that populate the galaxy.
For an example of a galaxy undergoing an interaction- induced starburst, let us look at M82, a member of a nearby group of galaxies. M82 is a rather disturbed-looking disk galaxy that is currently undergoing a massive amount of star formation in its nuclear region. The cause is theorized to be a close encounter between M82 and M81, its large neighbor, which occurred about a billion years ago (Lipscy & Plavchan 2003).
If you put your finger gently on a loudspeaker you will feel it vibrate - if it is playing a low note loudly you can see it moving. When it moves forwards, it compresses the air next to it, which raises its pressure. Some of this air flows outwards, compressing the next layer of air. The disturbance in the air spreads out as a travelling sound wave. Ultimately this sound wave causes a very tiny vibration in your eardrum - but that's another story.
Waller, William H. The Milky Way: An Insider's Guide. Princeton, N.J: Princeton UP, 2013. 42+. Print.
Electric guitars are devices that generate sound from a set of pickups that convert string vibration into electrical signals for amplification. The sound starts out as vibrations the musician creates while playing. These vibrations are picked up by the pickups of the guitar. What are pickups? Pickups are permanent magnets wrapped around in a coil. Since the strings are made with a special material called ferromagnetic, they interact with the magnetic fields in the pickups and force electrons to move in the loop. Moving electrons can generate a signal that can be read by the amplifier.
Dating all the way back to ancient Greece, Plato raised a challenge by merely asking, “Is it right because God commands it, or does God command it because it’s right?” Nowadays, this simple yet complex question poses a problem to modern day Christians. When understanding this question, you are forced to believe you only have one of two choices to accept. Those being either it is right because God commands it or God commands it because it is right. If it is right because God commands it then anything, specifically evil, could be right. On the other hand, if God commands it because it is right then the standard of goodness is no longer. Both options are hostile to Christianity. However, after further investigation, there is a third option: God’s very nature is the standard of goodness. By closely examining Plato’s Euthyphro Dilemma, it’s clear that a theist should undoubtedly accept the third option, being that of God’s nature is the standard of goodness.
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.
An underlying theme present throughout the series is the possibility that our existence is not the only one. According to current theories in physics, it is entirely possible that our universe is just one of many universes f...
The Spanish expansion and brutalization of the lands was not well known in Europe at the time. Even without complete knowledge, the government demanded that the native people be given a chance to convert to christianity, made aware that they fell under Spanish rule and be made aware of the laws of Spain. The Spaniards in the Americas, however, paid little but lip service to this
An electromagnet is a magnet that uses an electric current to attract metal, such as wiring a battery to coils on a ferromagnetic material. Electromagnets are also used in many different ways, some you may not know use electromagnets. Electromagnets are used in places like scrapyards to pick up extremely heavy objects such as cars, etc (Jessa 2009). CAT scanners have electromagnets in them to see the things that they need to see. Electr...
When a sound is made a vibration is sent through the air. The vibrations are let off by the source, and this leads to something such as an ear to pick up the noise. Once the detector has picked up the wave, the wave must be ...
A magnet, defined in the Merriam-Webster dictionary, is classified as “a piece of iron (or an ore, alloy, or other material) that has its component atoms so ordered that the material exhibits properties of magnetism, such as attracting other iron-containing objects or aligning itself in an external magnetic field” (insert citation for google). This definition is saying that a magnet contains a magnetic field and it can attract other objects with like properties of that magnet so that they match up with one another creating a constant hold. Magnets were discovered over 2,000 years ago when the Greeks found a mineral that joined with like objects made of iron. This mineral was discovered in a city called Magnesia, so the Greeks named it magnetite (insert saxon citation).
Comparing this galaxy’s size to are own Milky Way Galaxy, which is estimated to be around 8.5*1011 solar masses large, the Andromeda Galaxy is about 20% bigger then are own. Along with this we also know that both our own galaxy and this galaxy are on a collision course. It is estimated that in around 7.5 billion years that these two galaxies will merge together in a surely violent process. It is suspected that after this a large disc or elliptical galaxy will exist in the place of the once separate galaxies.
Astronomers believe that most galaxies consist of a supermassive black hole at the center, which attracts all constituents of galaxies such as, dust, gases (mainly Hydrogen and Helium), atoms, stars, interstellar clouds and planets to the center by force of gravity, but are not sure whether all galaxies contain a black hole in the center. Galaxies keep moving in relative motion to one another and intermittently can come so close that the force of gravitational attraction between the galaxies may become strong enough to cause a change in the shape of the galaxies, while in exceptional cases, the galaxies may collide. If two galaxies collide, they may pass right through without any effect or may merge, forming strands of stars, extending beyond 100,000 light years in space (World Book Online Reference Centre, 2005). Hence, neighboring and often other colliding galaxies induce the sha...
It’s a permanent magnet they have its own limits, but in their limits they work properly. with the help of attraction and repulsion law oaf magnets, we are try to put the magnets on their way they start moving in their own way hwlp of repulsion and attraction.
A magnet has an invisible field that forces other objects to respond to its properties. This powerful force, which is referred to as the magnetic field, has particles called electrons that actively shift and move within the field. These electrons constantly revolve around the poles, thereby creating energy that attracts objects. Because of this, a magnet has the ability to draw objects towards itself. This ability, which is called magnetism, is caused by the force field that magnets create through its protons (positive charge) and electrons (negative charge).