NASA's Solar Dynamics Observatory (SDO) has discovered a massive coronal hole on the Sun, which is about 30 times the size of Earth.
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Sun's dark spot
Coronal holes are not actual holes on the Sun's surface. They appear dark on the solar surface because they are cooler than their surroundings.
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Mysterious solar phenomena
Coronal holes are a part of the Sun's normal activity. However, they are not well understood and are considered the 'dark side' of solar activity.
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Auroras in high altitudes
The recently-spotted coronal hole will spark auroras in the higher altitudes on Earth on March 24, according to National Oceanic and Atmospheric Administration (NOAA).
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Solar activity
Most solar activity is harmless, but to be on the safer side, NASA, NOAA, and other organizations closely monitor the Sun.