Galaxy clusters

Significant Discoveries Funding was approved in 1977 for a Large Space Telescope in 1977 and in 1983 it was renamed Hubble Space Telescope in honor of astronomer Edwin P. Hubble who discovered evidence of an expanding universe and the existence of other galaxies. Work was completed in 1985 and it was launched and deployed from the Space Shuttle Discovery in April of 1990, 350 miles above earth. Since its deployment, there have been five services, each service to perform corrective and preventive maintenance

holes exist in galaxies. Scientist found evidence of a supermassive black hole in the center of the Milky Way, the galaxy NGC 4258, galaxy M87, and several more. Scientist verified the existence of black holes by studying the speed of the clouds of gas orbiting the galaxy regions. In 1994, the Hubble space telescope measured an unseen object that had an estimated mass of about 3 billion times the mass of the sun in our solar system. The unseen object was located in the center of the galaxy M87. Scientist

Most stars are born within the arms of a spiral galaxy where there is more gas and dust. Sometimes, numerous stars can form within the same molecular cloud, and we have what is identified as a star cluster. There are two types of clusters; Open cluster, which have a tendency to contain a few hundred fairly young, hot stars, that quite spaced out, and globular clusters, that also have about thousands of much older stars, more densely crowded together. The

Black holes, complex and difficult to understand, have intrigued both scientists and physicists alike since the eighteenth century. French scientist Pierre-Simon Laplace, born in 1749, was one of the first scientists to argue for the existence of an unexplainable body that encompasses an endless amount of space . Following Laplace, John Archibald Wheeler, an American physicist born in 1911, coined the term “black hole” for a space entity that is “so compact (in other words, has enough mass in a small

The Big Bang Theory What exactly is the Big Bang Theory? I know before starting this essay I knew very little of what it consisted. I figured that the Big Bang Theory had something to with the era of a new generation. One in which started after the extinction of dinosaurs to be quite honest. As I learn more about astronomy, this topic struck an interest and technically the big bang theory isn’t something that occurred but rather something that happened. It started the beginning of what we now call

In 1929, Edwin Hubble used observations of distant galaxies to show that such galaxies were moving away, suggesting the expansion of the universe. He also showed that there is a linear relationship between how far away a galaxy is and how fast it is moving away. This is known as Hubble’s Law. It suggests that the universe has been expanding at a constant rate since the Big Bang (Observatories of the Carnegie Institution for Science). Physicists generally assumed that gravity would slow the expansion

field of astronomy, as well as the man himself did. It was said that Edwin Hubble revolutionized the field of astrophysics. Biography.com states, “His research helped prove that the universe is expanding and he created a classification system for galaxies that has been used for several decades.” He made many contributions to science, as did the Hubble telescope, and that is why this invention is one of the greatest in the history of science. Biography.com cites that Edwin Hubble was born on November

Since the dawn of civilization, humans have always wondered if they are alone in this extensive collection of galaxies called the Universe. Perhaps, they are not alone. Is there intelligent life among the cosmos? The Milky Way galaxy is just one of nearly a hundred billion galaxies. With such a vast number of galaxies that are billions of light years away, the idea of contacting another form of intelligent life seems impossible. After the invention of the radio in the early 20th century, researchers

One of the most recent measurements Hubble Law  V= H o D( V is the velocity of a receding galaxy in km/sec. D is the distance away in Mpc and Ho is called the Hubble Constant with units of km/sec/Mpc) the Hubble constant is 67 ± 5 km/s/Mpc, measured by the 2dF Galaxy Redshift Survey (Slade, n.d.). The Hubble constant is a measure of the velocity of this observed expansion; in addition, there is also evidence at a slight acceleration

Black holes should probably not be called black holes. In fact, black holes are anything but empty space. Black holes are a great amount of matter packed and squeezed into a very small area. The result of this amount of matter squeezed into a small area results in a gravitational field so strong that nothing, not even light, can escape. Scientists do not have the ability to directly observe black holes with telescopes that detect x-rays, light, or other forms of electromagnetic radiation. However