I Have a Theory

The article ‘On the Recentness of What We Know,’ written by Verlyn Klinkenborg, is a pleasant read about the author’s fondness of astronomy and his insight regarding the science of it and knowledge gleaned from it. Klinkenborg recounts a few of his star-gazing memories and then proceeds to analyze the effects cosmological discoveries have on him personally and humanity in general. The author shares bits of theoretical history of the universe and information on the early astronomers whose hypotheses have developed that history. He goes on to reference various well known discoveries throughout the years and marvels at how drastically information in recent years has changed the stories of our universe.

The MACHO Project is a collaboration between scientists at the Mt. Stromlo & Siding Spring Observatories, the Center for Particle Astrophysics at the Santa Barbara, San Diego, & Berkeley campuses of the University of California, and the Lawrence Livermore National Laboratory. Their primary aim is to test the hypothesis that a significant fraction of the dark matter in the halo of the Milky Way is made up of objects like brown dwarfs or planets: these objects have come to be known as MACHOs, for MAssive Compact Halo Objects. The signature of these objects is the occasional amplification of the light from extragalactic stars by the gravitational lens effect. The amplification can be large, but events are extremely rare: it is necessary to monitor photometrically several million stars for a period of years in order to obtain a useful detection rate. For this purpose they must have built a two-channel system that employs eight CCDs, mounted on the 50 inch telescope at Mt. Stromlo. The high data rate (several GBytes per night) is

This problem wasn't solved until the 1920s, when Edwin Hubble devised the first method of extragalactic distance measurement. His technique relied on stars known as Cepheid variables, whose luminosities can be easily determined by measuring their rates of pulsation. Comparing this luminosity with the stars' observed brightness allowed Hubble to estimate the distance to Cepheid stars in such galaxies, affirming their extragalactic location.

The area on the H-R diagram where “normal” stars can be found is known as the _________.

b. The farther away a galaxy is the faster it appears to be moving away.

3. What is the Big Bang, and what does it say about the age of the universe?

R* is the average rate of formation for suitable stars. A suitable star must have an appropriate temperature (i.e. not too hot or cold). It is possible to use the average rate for the galaxy. This can get a bit hazy, as the

Chapter seven opens with the assumption of a cosmography concept of the universe from all history civilization. In particular, the perception of ANE society in terms of how they described the picture of the universe as a whole. Today, one can create a better map with the main features of the universe due to science and technology has evolved. At the same time, to have a better understanding of how the earth, the sun, and starts functioned within their area of operation.

Scientists using NASA's Hubble Space Telescope have discovered that the i halo of gas enveloping the Andromeda galaxy, our nearest massive neighbor, is about six times larger and 1,000 times more massive than previously measured. The dark, nearly invisible halo stretches about a million light-years from its host galaxy, halfway to our own Milky Way galaxy. One of the most common types of galaxies in the universe.

38.  You are observing a star about 950 trillion km (100 lightyears) away. How old is the most recent information you can get about this star?

Hubble accomplished this by cataloguing 24 different galaxies whose velocities and distances were able to be measured in order to attempt to visualize a relationship between the two primarily using spectroscopy. Hubble dealt with measuring the distance, while Bahcall’s paper mentions that while Vesto Melvin Slipher’s observations of velocity were used, he was not mentioned in Hubble’s original paper. The paper then goes into the finer details of each

This galaxy has such high rates of temperatures and pressure that the stars are being flung out into space. These stars are left without a mother galaxy, and in doing so are practically abandoned out in space. Scary, huh? However, in doing so, the mother galaxy is actually aging. When stars are lost from a galaxy, the cluster is losing gas and dust to form more stars and the population will slowly decrease until the galaxy can no longer generate more stars. This galaxy in particular is full of red stars, or old stars. Therefore, the galaxy is assumed to die within 2 billion years. We are only 200 million years into the

This observation means that it has taken every galaxy the same amount of time to move from a starting position to its current position. This observation is called "Hubble's Law," named after Edwin Hubble (1889-1953) who discovered this in 1929. Edwin Hubble’s evidence supports the expansion of the universe and suggests that the universe was once compacted. Third, if the universe was insanely hot as the Big Bang suggests, scientists should be able to find some of this heat left over. In 1965, Arno Penzias and Robert Wilson discovered a 2.725 degree Kelvin Cosmic Microwave Background radiation which infuses the observable universe. This is thought to be the remnant that scientists were looking for. Finally, the discovery of great amounts of Helium and Hydrogen lead to support the Big Bang Theory. (LaRocco)

usually 11 to 150 megaparsecs in diameter and which are lighter versions of the typical galaxy

We live in a strange and puzzling world. Despite the exponential growth of knowledge in the past century, we are faced by a baffling multitude of conflicting ideas. The mass of conflicting ideas causes the replacement of knowledge, as one that was previously believed to be true gets replace by new idea. This is accelerated by the rapid development of technology to allow new investigations into knowledge within the areas of human and natural sciences. Knowledge in the human sciences has been replaced for decades as new discoveries by the increased study of humans, and travel has caused the discarding of a vast array of theories. The development of