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Space and Solar Glossary / Terms / Dictionary

Space and Solar Definitions - Z

Z

Zetta, a multiplier, x1021 from the last letter of the Latin alphabet. See the entry for CGPM.

Zenith

The point on the celestial sphere directly above the observer. Opposite the nadir.

Zurich Sunspot Classification

A sunspot classification system that has been modified for sesc use.


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