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Habing, Harm J.; Neugebauer, Gerry – Scientific American, 1984
The Infrared Astronomical Satellite (IRAS) is a survey instrument that has provided an overall view of the infrared sky and identified objects that merit further investigation. A description of the IRAS and examples of the types of astronomical data collected are presented. (JN)
Descriptors: Astronomy, College Science, Higher Education, Satellites (Aerospace)
Clark, David D. – Scientific American, 1999
Describes the worldwide use of Internet services and the changing technology to fill consumer requirements. Explains the technology that is used to provide Internet access. Focuses on the cable TV, telephone, and satellite-based communications industries. Sees satellites, which are mostly geosynchronous, as a broadband option, which is risky from…
Descriptors: Cable Television, Engineers, Internet, Modems
Gulkis, Samuel; And Others – Scientific American, 1990
Outlines the Cosmic Background Explorer (COBE) mission to measure celestial radiation. Describes the instruments used and experiments involving differential microwave radiometers, and a far infrared absolute spectrophotometer. (YP)
Descriptors: Aerospace Technology, Radiation, Satellites (Aerospace), Science Equipment
Kellermann, Kenneth I.; Thompson, A. Richard – Scientific American, 1988
Describes the very-long-baseline array (VLBA) system of radio telescopes that will be completed in the early 1990s. Explains how the VLBA system works and the advantages over present technology. Compares associated international telescopes and very-long-baseline interferometers (VLBI). Illustrates applications for the VLBA and VLBI. (CW)
Descriptors: Astronomy, Earth Science, Research and Development, Satellites (Aerospace)
