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McDonald Observatory is a major astronomical research facility located in Texas. It plays a key role in observing various celestial phenomena including solar activities.
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Helioseismology: The study of the propagation of wave oscillations, particularly sound waves, within the Sun.
Sunspot: A temporary phenomenon on the Sun’s photosphere that appears as spots darker than surrounding areas due to lower temperatures.
Solar Flare: A sudden flash of increased brightness on the Sun, usually observed near its surface and in close proximity to a sunspot group.