Combines coordinate systems, planetary positions, use of the celestial globe, and synodic period in a graphing exercise. Information is given to duplicate an occurrence of 1940 in which five naked eye planets were simultaneously visible. (CP)

Discusses various theories about life on Mars and biochemical experiments pertaining to the origin of life. (MLH)

A discussion of the "Martian Canal" controversy and how it can be used to help students understand the workings of science is presented. (MDR)

This article discusses the origins and relative abundance of the elements, the factors that determined the chemical composition of the earth, and nucleosynthesis in the stars. (Author/BB)

Describes some science apparatus: included are a gene kit to demonstrate aspects of population genetics and selection, an electronic thermometer for use in the field of environmental studies, an astrobrella to use in astronomy classes, and crystal display models of different substances for chemistry classes. (GA)

Explains the concept of jerk and resolves it, for planar motion, into two components: tangential-normal and radial-transverse. Expresses the normal component in terms of an affine differential invariant, the aberrancy. Uses aberrancy properties to establish geometrical properties of the jerk vector for plane motion. (GA)

Work reported on here includes such topics as: the origin of the solar system, a planet-crossing asteroid survey, and Mars and Venus probes. (BB)

Describes the construction of a test item file for an Introductory Astronomy course. The questions are typed on cards, arranged by a content categorization scheme for quick retrieval, and classified according to behavioral objectives. (GA)

Shows that the expansion of the universe and its hierarchical structure may solve the dark night sky paradox. Points out that Harrison's solution, and the expansion of the universe, are equally important in explaining the reduction of radiation density to the level we observe by night. (Author/GA)

Includes eleven short notes, comments and responses to comments on a variety of topics such as uncertainty in a least-squares fit, display of diffraction patterns, the dark night sky paradox, error in the dynamics of deformable bodies and relative velocities and the runner. (GA)

Presents a summary review of 36 introductory college level astronomy textbooks for nonscience majors. References to more detailed reviews published elsewhere are provided where they exist. (SL)

Discusses recent research on cratering and meterorite impact on astral bodies. (MR)

A summary of some of the newly gained information about Mars from the Viking Lander is presented. (MR)

Reports results of a survey of student belief in astrology and changes in attitude as a result of taking a course in astronomy. (SL)

Discusses a number of possible explanations for the Christmas Star as described in the Bible. (SL)