companion star
Americannoun
Etymology
Origin of companion star
First recorded in 1775–85
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Astronomers analyzing fresh observations from NASA's Hubble Space Telescope and several ground-based observatories have uncovered clear signs that a recently identified companion star is shaping the environment around Betelgeuse.
From Science Daily ● Jan. 10, 2026
These patterns provided strong evidence of the long-suspected companion star and revealed how it affects the red supergiant's outer atmosphere.
From Science Daily ● Jan. 10, 2026
These long-term observations revealed the effects of a companion star that had previously been suspected but not confirmed.
From Science Daily ● Jan. 10, 2026
They have identified a companion star that repeatedly passes through the same region where this unusually hot dust remains.
From Science Daily ● Dec. 17, 2025
Procyon moves in an orbit which requires the presence of a companion star, but it has as yet eluded our search.
From Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work by Warren, Henry White
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
