Described are the history, formation, and observing techniques of meteors and comets. Provided are several pictures, diagrams, meteor organizations and publications, and meteor shower observation tables. (YP)

Describes Neptune through Voyager 2 including the discovery, location, atmosphere, ring arcs, radiation, two satellites, and Voyager's goals. Provides several diagrams and pictures. (YP)

Reviews the history of pulsars generally and the 1974 discovery of the binary pulsar by Joe Taylor and Russell Hulse specifically. Details the data collection and analysis used by Taylor and Hulse. Uses this discussion as support for Albert Einstein's theory of gravitational waves. (CW)

Presents findings and conclusions about the origin of the moon, favoring the capture hypothesis of lunar origin. Advantage of the hypothesis is that it allows the moon to have been formed elsewhere, specifically in a hotter part of the solar nebula, accounting for chemical differences between earth and moon. (JN)

Discusses the trigonometric or heliocentric parallax method of measuring distances to the stars. A description of how parallax distances are derived, the importance of this method, and the limitations of this method are also included. (DS)

Discusses various aspects of space astronomy, considering advantages, the space telescope and ground-based astronomy, an orbiting astrophysics facility, solar physics, and other areas. Indicates that earth-based astronomy will continue to be carried out there and space astronomy will be limited to observations that can be carried out only from…

Based on the premise that discoveries raise more questions than they answer, explores various research questions related to the discovery of the planets and discoveries related to the theory of stellar evolution. (SK)

Discusses the Pioneer satellites' explorations of Jupiter and Saturn. Includes discussions of engineering, the messenger program, and future projects. Provides pictures, diagrams, and a description of the Pioneer "message" plaques. (YP)

Reports on some of the discoveries over the last quarter century regarding quasars including spectra and energy sources, formation and evolution, and cosmological probes. Describes some of the fundamental mysteries that remain. (CW)

Describes the use of spectroscopy and the redshift to measure how far an object is by measuring how fast it is receding from earth. Lists the most distant quasars yet found. Tables include "Redshift vs. Distance" and "Distances to Celestial Objects for Various Cosmologies." (CW)

Discusses the history and origins of the moon including analysis of highland and basin samples, volcanic activities, the surface soil, and origin issues. Provides pictures and diagrams. (YP)

Tells the story of Maarten Schmidt and the discovery of quasars. Discusses the decomposition of light, crucial observations and solving astronomical mysteries. Describes spectroscopic analysis used in astronomy and its application to quasars. (CW)