sunspot

A cooler, darker area that appears periodically on the Sun's photosphere, associated with strong magnetic activity.

• 🇨🇳太阳光球层上出现的较冷、较暗的区域，与强烈的磁活动有关。

1. Dark spot on the sun C1 formal scientific

   A temporary, cooler, darker area on the sun's surface (photosphere) that appears periodically and is linked to intense magnetic activity.

   • Sunspots can be observed using a special solar telescope.
   • The number of sunspots increases and decreases in an 11-year cycle.
   • Scientists study sunspots to understand solar magnetic fields.

   🇨🇳太阳黑子

• sunspots plural form
• sunspots' possessive plural form
• sunspot's possessive singular form