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 was expanding at an accelerated rate by measuring the red-shift of an object by comparing the spectral lines of the elements and the spectral lines of the same elements measured in a lab. The more distant the objects that emit light the brighter the spectral lines. In 1998 scientist observed that the supernovas are becoming dimmer, which means they are getting closer instead of farther away.
They were able to show that dark energy has an influence on light particles and photons. When a photon passes a galaxy it falls into the gravitational pull, and the dark energy because it repulses gravity makes the photon pass right through the galaxy with even more energy than when it entered. These findings make dark energy completely independent of the supernova observations.
Astronomers have found the first direct evidence of dark energy in the afterglow of the Big Bang, the radiation caused by the Big Bang called cosmic microwave background (CMB). The cosmi...
There are still numerous possibilities and crossroads that have not been discovered but could create an energy
Cosmology is a field of astronomy that focuses on the framework, and emergence of the universe. Over the years, many cosmologists have contributed to the subject, using many forms of technology, to make a multitude of discoveries. Improvements in technology are responsible for superlative discoveries, chiefly about the Big Bang, the origin of our universe. The works of various cosmologists, such as Galileo Galilei, Edwin Hubble, Robert Dicke, Arno Penzias, Robert Wilson, and Vera Rubin have changed the way humanity views the universe, through their use of technology, and through their brilliance.
Of all the galaxies in the entire Universe these are the closest to our galactic system. About 170,000 light-years away from the Milky Way galaxy lie the Large Magellanic Cloud. With only 15 billion young bright stars, it is just one-quarter the size of our own galaxy. During the winter of 1987, a Canadian astronomer, Ian Shelton, spotted the first naked eye supernova since 1604, the result of a massive explosion. No more exciting and scientifically significant event has occurred over the last decade in science than Supernova 1987A, as it is known. Photographs taken on the night of February 23, 1987, of the Large Magellanic Cloud, a companion galaxy to our own Galaxy, at Canada's southern hemisphere observatory at La Silla, Chile, and at the Siding Springs Observatory in Australia, revealed a 6th-magnitude object where only 12th-magnitude blue supergiant stars had been observed before. Scientists believe that the progenitor of Supernova 1987A is a typical blue supergiant of spectral type B3. Spectra taken in 1977 do not suggest anything unusual happening in the outer layers of the star prior to undergoing the supernova outburst. This is not surprising since the real changes were occurring deep inside in a relatively tiny portion of the star's radius. The Large Cloud is quite important because it is the location of this Supernova 1987A, the exploded star that for a time shone brightly but that is now dim and dead.
Just recently a major discovery was found with the help of a device known as The Hubble Telescope. This telescope has just recently found what many astronomers believe to be a black hole, After being focuses on a star orbiting empty space. Several pictures of various radiation fluctuations and other diverse types of readings that could be read from that area which the black hole is suspected to be in.
Overbye, D. (2014, March 17). Space Ripples Reveal Big Bang’s Smoking Gun.The New York Times. Retrieved March 21, 2014, from http://www.nytimes.com/2014/03/18/science/space/detection-of-waves-in-space-buttresses-landmark-theory-of-big-bang.html?_r=0
The number of theories surrounding how the universe materialized is nearly endless, but Krauss’ thesis is one of the most convincing and buttressed that has been proposed. Lawrence Krauss is one of the most well respected theoretical physicists and cosmologists in America and has done extensive research on how and why the universe is in existence. Like the title of his book, A Universe from Nothing: Why There is Something Rather than Nothing, his entire theory surrounds the fact the universe was created from nothing. In support of his argument, he explores the weight and shape of the universe, dark matter and energy, quantum mechanics, visual particles, and expansion rates. While the world may never know exactly how the universe was created, society is getting closer to figuring it out and Krauss may have been the one to figure it out.
Accounts for the movement of stars and expansion of
Increasing our knowledge of Physics, using the scientific method to make observations and test hypotheses is essential to unlocking the secrets of the universe. Energy is one of the most fundamental elements of the universe. Throughout history, man has endeavored to expose, understand, and explain how and why things work. This drive to expand our understanding eventually led to the development of the scientific method and what is commonly considered to be the king of the sciences, Physics. The effects of energy on the physical world are of great interest to Physicists. The scientific method was developed during the seventeenth century. It is based on collaborative efforts of the great scientists and mathematicians who lived during that period such as Francis Bacon, Galileo Galilee, Johannes Kepler, and Rene’ Descartes. These men realized that true knowledge must be based on empirical observation and verified by experimentation. Recently, physicists have been searching for a unifying theory to bring all of the fields of Physics together under a single umbrella theory expressed as a short equation. This so called unifying field theory will usher in a new era in physics and greatly increase our understanding of the workings of the universe Physics is the king of science, and Sir Issac Newton is the king of Physics. Physics deals with matter, motion, force, and energy.
...ity, strange energy-fluid that filled in space, and that Einstein’s theory of gravity could be wrong and a new theory could be found about the cosmic acceleration. Dark energy effects space and time. Dark energy overcomes gravity. In the 1990s, astrophysicists examined distant supernovae to calculate the deceleration of the universe. These astrophysicists were surprised by the results of actually seeing that the universe is accelerating. The Hubble law is the rate of expansion and acceleration of the universe. The results from measurements made off the Hubble law confirms the existence of dark energy and how much of it exists. Quintessence is the possibility that the universe is filled with a changing energy field. According to Einstein’s cosmological constant for a stationary universe, empty space can have its own energy and can increase when more space emerges.
...scientific team (Roach 2012). Turnbull’s team evaluated over 245 Supernovae stars, using various mathematical formulas. The conclusion found that the stars were travelling at approximately 245 kilometres per hour in a certain direction, although the some minor details of what was being measured remained different, like the degree of change regarding motion. Additionally, athour details may make this a weak comparison, as Kaslinsky’s dark flow is moving approximately 4 times faster, running in a unique direction and extending further then Turnbull’s team.
They tended to think galaxy as steady and static beacons of the sky but they are instead shimmering/flickering, cause by all the pulsating stars in the galaxies. Throughout their lives, stars experience momentous changes. They become brighter and surge in size, absorbing and destroying anything within its distance. Towards the end of their lifetime, they begin to quiver and pulsate, increasing and decreasing their illumination every few hundred days. Until now, no person had ever studied the way pulsating starts effect the light coming from distant galaxies, where the light of the pulsating stars is mixed with many more stars that have a more constant illumination. After sung the images from the Hubble telescope to confirm the change in brightness from Galaxy M87, they concluded that stars in that galaxy pulsate once, nearly every 270
Hubble found this relationship while working in Pasadena. His work essentially involved measuring the redshift of a number of distant galaxies. He was also able to measure their relative distance by measuring the apparent brightness of a class of variable stars in each galaxy. This relationship now called Hubble’s law states that the greater the distance to a galaxy the greater the redshift in an equation: V=H0d. Hubble constant is believed to be around 73.2 km/s/Mpc. This finding was exciting because Hubles law is directly proportional-so an object twice as far away is receding from us twice as fast. This is just what would be expected in an expanding universe, as an expanding universe would be expanding equally on all sides. Such a thought process can easily be visualized through the “expanding chocolate chip cake analogy” whereas the cake is being baked the chocolate chips in the cake recede from one another as the cake expands. This is of course just what the galaxies do as the universe expands. This discovery was incredible and was credited with solving Olber’s paradox of the dark night sky. It is also important to understand that the term red shift with respect to light implies that the object is moving away from the observer. This is because in a Doppler shift where light waves get “redshifted”
Such as, the age of the universe. Before this telescope was made they would have never been able to determine when the “Big Bang” happened, as well as many other discoveries. This also helped them see how galaxies form. It has revealed extraordinary details about the process by which sun-like stars and their lives as planetary nebula. Also scientist are able to observe details of astronomical objects that had never been seen before. The very first image this telescope captured was the aftermath of Jupiter’s collision with a suspected comet. This also helped scientist discover how fast the universe is changing and the expansion of the universe has stretched its light farther than any other galaxy previously identified. Another big discovery was dark energy, which is a mysterious force that causes the expansion of the universe to accelerate. This is just the few discoveries this telescope has made. The amount of time spent with this telescope by scientist is unreal and proves how much they want to improve the science
... with the rate at which the universe is accelerating, allows us to calculate how long it took for them to reach their current locations. The answer is about 14 billion years. The second method involves measuring the ages of the oldest star clusters. Globular star clusters orbiting our Milky Way are the oldest objects we have found and a detailed analysis of the stars they contain tells us that they formed about 13 billion years ago. The good agreement between these two very different methods is an encouraging sign that we are honing in on the universe’s true
The universe, it's vastness, how it was created, and why we are a part of it amazes and astounds many people who are constantly searching for answers. Others believe they have the answers and try to persuade people to understand their view. Others don't even think about it at all.