companion star

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noun Astronomy.

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Origin of companion star

First recorded in 1775–85

Words nearby companion star

companion ladder, companion piece, companion planting, companion set, companionship, companion star, companionway, company, company doctor, company grade, company man

How to use companion star in a sentence

That’s because, when the companion star removes the massive star’s envelope, the helium core shrinks.
How massive stars in binary systems turn into carbon factories|Ken Croswell|November 18, 2021|Science News
New calculations indicate that a massive star whose outer layer gets torn off by a companion star ends up shedding a lot more carbon than if the star had been born a loner.
How massive stars in binary systems turn into carbon factories|Ken Croswell|November 18, 2021|Science News
From this, we established how many of stars contained more planetary material than their companion star.
A Quarter of Sun-Like Stars Eat Their Own Planets, According to New Research|Lorenzo Spina|September 2, 2021|Singularity Hub
Salisbury writes that the “dog star” Sirius, for example, is the brightest star in the sky not only because of its relatively close proximity to earth but because of the presence of a companion star, or “pup,” that boosts its shine.
Everything You Need to Know to Take Your Kids Stargazing|lwhelan|July 18, 2021|Outside Online

Then, astronomers realized that old pulsars can “spin-up” by siphoning mass from a companion star, and flash every one to 10 milliseconds.
Here are 10 of Arecibo’s coolest achievements|Maria Temming|December 7, 2020|Science News
"Except that we saw that companion star when we stopped back there, half an hour ago," said Fuller.
Islands of Space|John W Campbell
This change of brightness is due to the presence of a companion star.
Astronomy for Young Folks|Isabel Martin Lewis
The companion star is a faint white star of the ninth magnitude.
Astronomy for Young Folks|Isabel Martin Lewis
This remarkable variable has a dark companion star revolving near it obscuring its light in part from us at stated intervals.
A Field Book of the Stars|William Tyler Olcott
The faint white companion star formed with these three suns a system of four suns revolving about a common center of gravity.
Astronomy for Young Folks|Isabel Martin Lewis