tài​yáng​hēi​zǐ

sunspot

太阳黑子 太陽黑子 tài​yáng​hēi​zǐ
sunspot
Dark spots appearing on the surface of the sun's photosphere, which have strong magnetic fields and vary in number over an eleven-year cycle; their activity can disrupt radio communications on Earth.

Frequency

Written text
0.233 per million

Cross-References

Same as

Referenced by

Sources

Frequency data
BCC Corpus (BLCU)