The Sun

NASA explains solar cycle 25

What does a solar cycle mean for Earth?

by JoAnna Wendel
Updated: 
Originally Published: 

In September 2020, NASA announced that the Sun had entered its 25th solar cycle since recording began in 1755.

NASA

These cycles last about 11 years, and come with a solar minimum and a solar maximum. This year’s solar maximum may arrive by 2025, solar physicists say.

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