The Radio Sky and How to Observe It (Astronomers’ Observing Guides)
Radio astronomy is far from being beyond the scope of amateurs astronomers, and this practical, self-contained guide for the newcomer to practical radio astronomey is an ideal introduction. This guide is a must for anyone who wants to join the growing ranks of 21st Century backyard radio astronomers. The first part of the book provides background material and explains (in a non-mathematical way) our present knowledge of the stronger radio sources – those observable by amateurs – including the Sun, Jupiter, Meteors, Galactic and extra-galactic sources. The second part of the book deals not only with observing, but – assuming no prior technical knowledge of electronics or radio theory – takes the reader step-by-step through the process of building and using a backyard radio telescope. There are complete, detailed plans and construction information for a number of amateur radio telescopes, the simplest of which can be put together and working – using only simple tools – in a weekend. For other instruments, there are full details of circuit-board layouts, components to use and (vitally important in radio astronomy) how to construct antennae for radio astronomy.
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read moreInterview With Nick Pope, World Famous UFO Expert on 8/21/07
Nick Pope famous ufo investigator: Mr. Nick Pope worked for the Ministry of Defense in the U. K. He was in charge of ufo investigations for three years. He is the author of several ufo books and has appeared in various documentaries and tv programs.
Ken: Webmaster of About Facts Net Internet Magazine.
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read moreShapes and Spins of Near-Earth Asteroids
Asteroids are diverse and numerous solar system objects, from the large number of objects in the main asteroid belt to the relatively small near-Earth population. Understanding their physical properties is essential to understanding the evolution of the solar system, and asteroid morphology is a complex field in its own right. The histories of individual asteroids, and particularly near-Earth objects, reflect continuous interaction among their shapes, rotation states, and orbits due to the effects of radiation pressure. Radar astronomy has provided detailed information on the orbits, sizes, shapes, rotation states, and composition of many asteroids. To improve the capabilities of asteroid radar observations, I have developed the technique of radar speckle tracking. The echoes from different points on the surface of a radar target interfere with each other, producing a pattern of bright and dark speckles across the surface of the Earth. Using radio astronomy techniques, I track the motion of speckles between several ground stations during a radar experiment to accurately determine the rotation state of the target. Speckle tracking is a powerful tool both to determine the orbital evolution of near-Earth asteroids, particularly potential Earth impactors, and to survey the overall physical properties of the asteroid population. In addition, I have studied applying the techniques of adaptive optics and radio interferometry to asteroid science. These will become more useful with the next generation of asteroid-detecting surveys and the construction of large sub-millimeter interferometers. Interferometry in particular will soon be able to survey the entire asteroid belt.
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read moreShould discovery be stopped?
The brake on discovery provided by the peer system is arguably a good thing.
It preserves some stability in the careers of ‘normal’ scientists, who are very useful to society and to the educational system, and who far outnumber the few innovators who are required to suffer for rocking the boat.
And for the world at large, the needless delays and inefficiencies give more time to adapt to the consequences of discovery.
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read moreRust BULLET A Far better Option
A Layer is a concerns employed to separate two highly reactive supplies. Coatings need to be a entirely continuous film to fulfil its functionality
Rust Bullet, LLC was formed February of 2001 in Reno, Nevada, exactly where our Corporate Offices nevertheless operate. The Rust Bullet Products underwent two many years of extensive testing just before getting launched to the marketplace. Corrode Bullet’s organization consists of eleven international distributorships, with 28 places, servicing Europe,
Asia, Africa, Middle East, Micronesia, and North America. Environmental Awareness is a essential concern in our production method, and as this kind of, our products include no lead, no zinc, no chromates, no heavy metals, and pass the EPA Standards for Potable Water as properly as the California VOC Standards for a metallic pigmented finish. This was the 1st time the United Says Patent & Trademark Business office (USPTO) issued two patents for two new technologies to a single corrode/deterioration-manage item.
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read moreInterstellar Chemistry And Astrobiology
In the night sky, the expanses of space between the stars of the Milky Way appear to be empty. In fact this space is occupied by a very thin gas that is mostly hydrogen and that has mere traces (less than 0.1% by number of atoms) of other elements such as oxygen, carbon, and nitrogen. The gas is also dusty; it contains grains of dust (particulate matter) that, like an interstellar fog, impede one’s view of the stars. This gas is not evenly spread in space, but is clumpy. Although on average there is approximately one hydrogen atom for every cubic centimeter of interstellar space, a clump may be one thousand or more times as dense as a comparable volume of average density. Since about 1970 astronomers have been finding that these denser regions contain a great variety of molecules; about 120 different molecular species have been identified in the interstellar medium. The study of these molecules in the Milky Way and in other galaxies is called astrochemistry.
Astronomers identify interstellar atoms and molecules via spectroscopy . For example, interstellar sodium atoms that happen to be in a line of sight going from a point on Earth’s surface toward a bright star absorb light emitted by that star at a wavelength that is characteristic of sodium atoms (about 589 nanometers; 2.3×10?5 inches). Most interstellar molecules are detected by spectroscopic analysis that measures absorption or emission at radio wavelengths rather than those corresponding to visual light. Astronomers use large radio telescopes to detect radiation emitted by interstellar molecules. These emissions arise because the molecules are set to rotating when they collide with each other. The molecules lose energy and slow down in their rotations by emitting radiation at wavelengths that are specific for them, such that each emission is a “signature” of one type of molecule. For example, the molecule carbon monoxide, CO, may emit at various radio wavelengths, including 2.6 millimeters (0.1 inches), 1.3 millimeters (0.05 inches),0.65 millimeters (0.03 inches), and 0.32 millimeters (0.01 inches). Interstellar gas is usually very cold (around 10 degrees above absolute zero), but even under these conditions the molecular collisions are energetic enough to keep the molecules rotating and, therefore, emitting radiation. About 120 types of molecules have been identified in the space between the stars in our galaxy.
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read moreListen Up!: Laboratory Exercises for Introductory Radio Astronomy with a Small Radio Telescope
This book contains the background information and laboratory exercises to accompany an undergraduate level course in radio astronomy. The observations are made using a Small Radio Telescope (SRT). The SRT was developed at MIT Haystack Observatory and is now sold as an inexpensive kit which provides everything necessary to introduce users to the amazing world of radio astronomy…. More >>
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