The loops, rooted in active regions near sunspots and guided by the sun's magnetic field, arch over the sun and may be the first signs of trouble spots, where plasma undergoes "impulsive heating," according to the researchers.
What does AR stand for?
AR stands for Active Region (sunspot observation)
This definition appears very frequently and is found in the following Acronym Finder categories:
- Science, medicine, engineering, etc.
See other definitions of AR
We have 156 other meanings of AR in our Acronym Attic
- Acquiescence Ruling
- Acquisition Reform
- Acquisition Request
- Acquisition Risk
- Acrobat Reader (Adobe Systems)
- Action Replay (game console cheat device)
- Action Report
- Action Required
- Action Research
- Active Radar
Samples in periodicals archive:
We are one of the most active regions in the UK and have over 500 members," said Jon.
383 QB524 Drawn from those presented at the April 2007 workshop, this collection of papers focuses on solar active regions and their origin and evolution on the sun as indicated by helioseismology, magnetometry and modeling.
It takes about 27 days for the sun to rotate on its axis, so an active region that forms on the far side can remain hidden for up to 13 days and surprise Earth-bound observers when it finally rotates into view.
Other zones of high heat flux lie beneath regions where scientists have described subglacial lakes, including Lake Vostok, which lies in a seismically active region beneath 4 km of ice (SN: 3/3/01, p.
He met Northwest Development Agency chairman Bryan Gray and fellow Io D members and regional chairmen, saying: ``I got a very clear view that the north west is a very active region and one of the parts of the UK that works well as a region with two vibrant main centres in Liverpool and Manchester.