HR diagram - definition of HR diagram by The Free Dictionary
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A graph (devised 1911–13) plotting stars’ colors against their brightness in descending order, with the Sun midway in the sequence.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
References in periodicals archive
Astronomers use shorthand to Indicate where on the HR diagram
a particular star might be.
The stars on this diagram (HR Diagram
) tend to lie along a broad band that climbs to the left (higher luminosity).
Clearly, the HR diagram
still has secrets to reveal.