On 26 Oct, 2015By makiriparan@yah...With 1 Comments
In principle a homopolar generator consists of a conducting disc spinning about an axis in a magnetic field parallel to axis. When the spinning disc stopped suddenly, all its kinetic energy can be used to generate large current surges.
Step outside on these cool autumn nights about an hour after sunset on a clear night and look up. Cygnus the Swan is also known as the Northern Cross is well-positioned overhead and easily recognized. The faint glow of hundreds of millions of stars, too dim to be distinguished individually by the human eye, is seen along the long neck of the swan is the perfect guide when attempting to glimpse the galactic arms of our Milky Way Galaxy from light-polluted suburban skies.
Astro-Imaging Projects for Amateur Astronomers, Jim Chung's intelligent and attractively written guide to making and adapting imaging and observing gear, has recently appeared in Springer's Patrick Moore Practical Astronomy Series.
Those familiar with Jim's articles in the RASC's Journal will know of his genius for devising understandable and doable solutions which perform as well as their commercial counterparts, and at a fraction of the cost.
Moving eastward from the great Teapot of Sagittarius, we continue our voyage along the ecliptic to Capricornus – The Goat. It takes up 414 square degrees of sky, making it 40th in overall size. To date, five stars residing within the boundaries of Capricornus are parents to nine planets. The stars that define the asterism are of average brightness, running in the range of magnitude 2.8 to 4.5.
Justin Erik Halld´or Smith (1972) is an American-Canadian philosopher, at present a professor in the Department of Philosophy and Sciences at Diderot University, Paris. His recent book Nature, Human Nature and Human Difference (2015) is a collection of philosophical essays.
Since 1958, the RASC has gathered annually to meet, exchange the latest astronomical accomplishments of its members and celebrate the achievements of its award winners. The General Assembly or GA as it is known is an excellent opportunity for members of the RASC from across the country to gather and strengthen the bonds of community.