Instructions for observing the Solar Eclipse on Saturday, March 7, 1970, which will be total along a strip about 85 miles wide along the Atlantic Seaboard. Safety precautions and how to construct a pinhole camera to observe eclipse. (BR)

Summarizes the present understanding of lunar structure, emphasizing the role of the NASA moon explorations. (AL)

Theories associated with the gravitational collapse of a star into black holes" are described. Suggests that the collapse and compression might go through the stages from white dwarf star to neutron core to black hole." (TS)

Describes the use of modern research equipment (electron microscopes, seismographs, and solar telescopes) for education from primary to upper secondary levels in a county science center. (AL)

Describes the circumstances of the total and partial solar eclipse of March 7, 1970 in certain American cities. Also discussed are (1) a classroom demonstration of the cause of solar eclipses, (2) techniques for safely observing the eclipse, and (3) what to observe during the eclipse. Bibliography. (LC)

A search is in progress for copies of Copernicus' 1543 publication "On the Revolutions of the Celestial Spheres." The history of each copy (215 found thus far) is being analyzed to offer insights into the past. For example, the futility of the Inquisition's attempt to censor the book was chronicled. (Author/JN)

Planetariums are being used for entertainment instead of the academic study of astronomy. Economic necessity is forcing them to use their unique projection systems for a wide variety of spectacles, including laser light shows and theatrical performances. (AM)

Presents an abridged version of a chapter from the author's book "In Quest of Telescopes." Includes personal experiences at Kitt Peak National Observatory, and comments on telescopes, photographs, and making observations. (SK)

Described are recent developments and discoveries in radioastronomy. Topics discussed include galactic structures, stellar evolution, the binary pulsar and general relativity, extragalactic radioastronomy, model of the source of radioactive emission and quasars. (DS)