Secrets of the Deep Sky
New developments in such areas as astronomy, particle physics, and health are covered in an array of new and revised articles. New articles include IRAS (Infrared Astronomy Satellite) nuclear magnetic resonance imaging AIDS Alzheimer's disease, and several other diseases of major concern and Barney Clark and Robert Jarvik, the recipient and designer of the first artificial heart.
Some BASICs, for example Mod-Ill, have a command to convert a date to a consecutive number of the day in a year. They call it julian date, but it has nothing to do with the old Roman calendar, nor is it quite like the Julian dating system known in astronomy. Astronomers count consecutive days starting from January 1,4713 BC, a theoretical date when the solar and lunar cycles would have been in synch with the ancient Roman tax collection cycle ( and you thought IRS was our modern American invention). By now those day numbers are truly astronomical, close to 2,450,000. The term julian was coined in 1582 by the author of this dating system, the astronomer Scaligeri, in memory of his father Julius.
A high-resolution plotting and tracking program for amateur astronomers The object of this article is to describe a program for constructing HR Diagrams used in many astronomical studies. Part of any science is the art of seeing patterns in the data that accumulates through observation and experimentation. In astronomy, one of the landmarks of pattern recognition is embodied in the HR Diagram, named for Ejnar Hertzsprung and Henry Norris Russell. This graphic plot of a star's absolute magnitude versus spectral class combined the work of many astronomers. Some had been busy for years compiling fundamental measurements that made it possible to talk about a true luminosity value for a star. Others had been classifying stellar spectra and were coming to understand the information contained in the series of bright and dark lines that stand out against the continuum of colors composing the little k4rainbow created from each star's image by the spectroscope. It is not my purpose to go into...
On RUNning the program you are confronted by a list of choices, from which you proceed to the calculations. We'll look at each one and explain what they mean. (I don't intend to give a lesson on basic astronomy due to the length these instructions would take, so it would be advisable to use
E. P. Belserene, a professional astronomer at Maria Mitchell Observatory, uses her 80 to catalog the observatory's extensive collection of photographic plates, and to calculate heliocentric time. A former schizoid myself on clear nights, I connected my 80 through a slx-chip-inter-face-real time clock to a photoelectric photometer on my 8-inch Cassegrain. I observe stars with small but interesting light variations with it, which I report to professional astronomers. My 80 tells me which stars to point at, and where to place the photometer controls (very handy at 4 AM). It also displays a trace of the light from the star as it is received, twinkles and all, automatically records the light intensity and time, and computes the stellar magnitudes. My 80 is also used to transform the magnitudes to standard form, add heliocentric corrections, do a least-square-solution for time of Unlike the rare solar eclipses, some binary stars have an eclipse every six...
Only about one-third of the 90-page manual Is devoted to Instruction on using the game. The rest is full of facts about a space-colonization project, including diagrams and charts of lunar orbits, the Dakota space habitat, its lunar mining facility, and other believable information on the space shuttle and other equipment. The information on habitats and lunar exploration is based on facts in publications from The National Aeronautics and Space Administration. One chapter is devoted to using Lunar Explorer In the classroom to study astronomy. physics, and space sciences.
The Solar System Featuring the Discovery of the Planet Pluto (Cat. No. 26-2647) is a new audio visual tutorial for the 16K Color Computer tape system. Among the features of this program is a segment narrated by Professor Clyde W. Tombaugh, the astronomer who discovered Pluto in 1930. A wall chart, hardback book by Dr. Tombaugh on the discovery of Pluto, and a list of suggested activities in the teacher's manual, provide enrichment for the computer program.
My approach to determining the sun's position does not use the astronomer's complex formulas, however. Instead, 1 developed my own method and approached the problem as essentially one in navigation, using the concept of G.P. sun, a term frequently used by navigators thai means the geographical position of the sun that is, that spot on the Earth's surface where the sun is directly overhead or at its zenith.
I have worked on a project for a while that involves the TRS-80 community. The Saguaro Astronomy Club released a database of deep sky objects and double stars for the IBM and MAC. With the help of a program by Luis Garcia-Barrio and much scutt work, I converted it to run on Profile 4 +. Some changing of the screens, and it could run just as well on Profile 3 +. Actually, any database program that can read fixed length, undelimited ASCII text can use the data, all 2 megs worth.
Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!