Dark Matter Essay

     Dark energy what is it? Dark energy is a unknown energy said to take up 70 percent of the universe. The energy is a repulsive gravitational effect that is causing the universe to accelerate out-ward. No one knows exactly what dark energy is or where it comes from.      Dark Energy is a new idea. Little is known about dark energy, yet it takes up a huge amount if the universe.      Scientist were able to show the universe

Radio waves, a form of electromagnetic radiation, have had a significant impact on our daily life because of their use as a form of communication. Radio waves have long wavelengths and have low energy photon particles. Because they have low energy photons, they have lower frequencies when compared to other forms of electromagnetic radiation, such as x- rays that have a higher frequency despite having short wavelengths. Today, radio waves are used as a method to transmit and receive information. Technology

the first to suspect the existence of dark matter in 1933. He was trying to measure the mass of a galactic cluster (a group of several galaxies) using two different methods. He tried to infer this mass from the speed of the galaxies. Just like kids on a merry-go-round have to hold on to avoid being ejected, galaxies are held together in a spinning galactic cluster by the gravitational force provided by the matter it contains. If there were not enough matter to create this force, the galaxies would

The Dark Forest / Keep Silent “As the Secretary-General of the United Nations, an organization of the 147 member states who represent almost all of the human inhabitants of the planet earth. I send greetings on behalf of the people of our planet. We step out of our solar system into the universe seeking only peace and friendship, to teach if we are called upon, to be taught if we are fortunate. We know full well that our planet and all its inhabitants are but a small part of the immense universe

found 47 galaxies at an adequately later time, when the universe was about 650 millions years old. Hubble has also discovered dark matter. Dark matter is invisible, but reveals its existence via gravity, makes up roughly 23% of the universe. The telescope made it easier to understand how Dark Matter behaves and could help scientist figure out more detail about dark matter. Hubble has greatly expanded astronomers knowledge of the Universe. Before the telescope, distance to far off galaxies were not

Sub-atomic particles, known as quarks, electrons, photons, and neutrinos were strewn across expanding space. Equal amounts of matter and antimatter particles began to collide and annihilate each other. Gravity, strong and weak nuclear forces, and electromagnetic forces soon came into play. As the universe started to cool, fundamental particles called quarks began to smash together forming protons and neutrons. They, in turn, merged to create the nuclei of simple elements, beginning with hydrogen

constantly deep in work to unravel the hidden truths. “Dark Matter in the Discovery Age”, “Why the Universe Had no Beginning”, and “What String Theory tells Us About the Universe” include theories vastly different from one another, but lead to the same conclusion; the universe’s creation. The

or dense gas passes through a cooler gas, it will produce a/an _________ spectrum. ATOMIC SPECTRUM 3. One name that has been given the mysterious force apparently responsible for driving the acceleration of the universe’s expansion is _________. DARK ENERGY 4. The area on the H-R diagram where “normal” stars can be found is known as the _________. MAIN SEQUENCE 5. Although Copernicus' model of the solar system correctly placed the sun at the center, it still provided inaccurate predictions

backward to find the time that they were all compressed together at the moment of the universe's origin, the Big Bang. The duration between then and now is the universe's age. Of course, a simple linear extrapolation won't do; the gravity resulting from matter in the universe can be

broken. The larger seeding theory states that the density of dark matter at the beginning of the universe attracted large gas clouds and cut off the formation of smaller stars. This gas cloud then collapsed to form and extremely large star, that then collapsed once more to for a black hole that attracted more gas and other particles. This theory is believed amongst astrophysicists but it is also denied by some, saying that the dark matter has nothing to do with the massive star formation, and that