coronal hole
Americannoun
Etymology
Origin of coronal hole
First recorded in 1970–75
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 initial confusion of how far the aurora would stretch was caused by the recurrence of a particular coronal hole, or a temporarily cool area on the sun where solar particles can escape.
From Seattle Times ● Jul. 13, 2023
The recent coronal mass ejection’s effect may also have been amplified by another solar phenomenon observed last week, called a coronal hole, says W. Dean Pesnell, an astrophysicist on NASA’s Solar Dynamics Observatory mission.
From Scientific American ● Mar. 30, 2023
The Northern Lights start at the sun when a sunspot or coronal hole allows a batch of charged particles to leave the sun and travel towards the Earth on the solar wind.
From BBC ● Feb. 5, 2022
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