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Surprisingly, humans have observed sunspots for a very long time, so historical sunspot observations provide us with some of our best long-duration records of solar activity. Large sunspots can sometimes
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IMF stands for Interplanetary Magnetic Field. It is another name for the Sun's magnetic field. The Sun's magnetic field is enormous and is carried by the solar wind. The solar wind and magnetic field are
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"Without warning, the relatively calm solar atmosphere can be torn asunder by sudden outbursts of a scale unknown on Earth. Catastrophic events of incredible energy...stretch up to halfway across the visible
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The Sun is not a quiet place, but one that exhibits sudden releases of energy. One of the most frequently observed events are solar flares: sudden, localized, transient increases in brightness that occur
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The visible solar atmosphere consists of three regions: the photosphere, the chromosphere, and the solar corona. Most of the visible (white) light comes from the photosphere, this is the part of the Sun
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To understand how our Sun works, it helps to imagine that the interior of the Sun is made up of different layers, one inside the other. The innermost layer, the solar core, is the region where the energy
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Scientists at the High Altitude Observatory (HAO) are working to understand the changes we see in the Sun over time, and how these changes affect the atmosphere of the Earth. There are four main areas
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Energy from the Sun is one of the primary drivers of the Earth system. The Sun warms our planet, heating the atmosphere. This energy feeds atmospheric processes and is a primary driver of our weather.
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