active sun

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noun Astronomy.

the sun at a maximum of solar activity, occurring every 11 years.

solar activity, superimposed on an unchanging background.

QUIZ

CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?

Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

TAKE THE QUIZ TO FIND OUT

Compare quiet sun, solar cycle.

Origin of active sun

First recorded in 1975–80

Words nearby active sun

active reason, active safety, active service, active shooter, active site, active sun, active transport, active vocabulary, active voice, activewear, activin