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.
The culprit is an unseen companion star that is pulling in material from its larger neighbor.
From Science Daily ● May 1, 2026
While observing a repeating FRB roughly 2.5 billion light-years from Earth, researchers detected a unique signal that pointed to the presence of a nearby companion star.
From Science Daily ● Jan. 28, 2026
"One natural explanation is that a nearby companion star ejected this plasma," explained Professor Bing Zhang.
From Science Daily ● Jan. 28, 2026
The researchers also studied Gaia BH3, another black hole system with an even stranger companion star.
From Science Daily ● Dec. 26, 2025
In 1842, Otto Struve discovered that the companion star is itself double, and round it there gravitates a sapphire sun, which is believed to accomplish a revolution of its orbit in about 500 years.
From The Astronomy of Milton's 'Paradise Lost' by Orchard, Thomas Nathaniel
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.
