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Hamamatsu Corp. - Earth Innovations LB 2/24

Interferometer Gauges Space

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Daniel S. Burgess

In the seemingly infinite universe, it is difficult to tell just how far that galaxy far, far away really is. Advances in stellar interferometry, however, promise astronomers a means to more accurately determine cosmic distances. Researchers working at the testbed interferometer at the Palomar Observatory have confirmed the feasibility of the Baade-Wesselink approach to measuring the distance to Cepheid variables, stars that pulsate in diameter over a regular period and that display an equally regular change in their apparent luminosity. Astronomers typically gauge the distance to...Read full article

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    Published: February 2001
    Glossary
    astronomy
    The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
    astronomyBasic ScienceResearch & TechnologySensors & DetectorsTech Pulse

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