Describes an exercise, suitable for use on programmable calculators or microcomputers, to calculate some of the rapidly processing orbits of a mass M near a static black hole star of mass M. (SK)

Presents a description of the world's largest radio/radar antenna, the Areciba Observatory in Puerto Rico. Activities at the observatory are discussed as well as the scientific research in the field of radio astronomy. (SA)

On the occasion of the publication of the fifth edition of his book "The Milky Way," the author presents information on this galaxy and his life-long interest and research in this area. (SK)

Describes the graphic construction of lunar eclipses and how lunar graphics are used. The meaning of some terms and concepts and a diagram for a total lunar eclipse are also included. (HM)

Summarizes some of the astronomy materials developed at the Lower North South Australian Science Teachers Association (SASTA) meeting of October, 1978. (HM)

Reviews four books dealing with the following topics: astronomy, computers, cryptology, and physics. (AEA)

This article reviews the historical and current observational status of searches for other planetary systems, discusses the nature of the observational problem, and indicates the prospects for success in the future. (DS)

Describes the gravitational lens effect and the chance of observing it. The use of stars, galaxies, or quasars is recommended for alignment with an intervening lens mass. (Author/SA)

Describes a technique whereby qualitatively correct models of differentially rotating degenerate stars may be constructed by simple methods available to undergraduate students. (Author/JN)

Presents the plans for constructing a spectrophotometer which can scan the spectrum in a thirtieth of a second. The instrument can be used to determine the absorption characteristics of a solution compared to a pure solvent. The instrument allows time to investigate phenomena that occur quickly. (Author/SA)

Discusses the state of the early universe based upon deductions from current observations. (SA)

Presents part two of an article that discusses the opinions of the public and scientists regarding Einstein and his theory of relativity during the years after 1919. (HM)

Presents a calculation of the precession of the perihelion of Mercury due to the perturbations from the outer planets. The time-average effect of each planet is calculated by replacing that planet with a ring of linear mass density equal to the mass of the planet divided by the circumference of its orbit. (Author/GA)

Describes a two-hour physics laboratory experiment modeling the phenomena of eclipsing binary stars developed by the Air Force Academy as part of a week-long laboratory-oriented experience for visiting high school students. (BT)

Described is a three-week unit on stellar evolution and cosmology taught as part of a one-year introductory high school physics course for seniors. Prerequisite topics necessary for a student's understanding of the material and topics covered during the unit are presented. (BT)