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Our Star – An Introduction to the Sun
The Sun is 150 million kilometers (93 million miles) away from the Earth (this distance varies slightly throughout the year because the Earth's orbit is an ellipse and not a perfect circle). The post...
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Layers of the Sun
The Sun, as shown by the illustration to the left, can be divided into six layers. From the center out, the layers of the Sun are as follows: the solar interior composed of the core (which occupies...
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How Big is the Sun?
The Sun is really really big! It is difficult to get a true feel for how big it is because nothing in our daily life comes even close. The post How Big is the Sun? appeared first on The Sun Today with...
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Solar Filaments, aka Prominences, Arc Upwards
[Alex on EARTHSKY.ORG] Solar filaments (aka prominences, when viewed on the limb of the sun) are large, bright arcs of solar material and magnetic fields. The post Solar Filaments, aka Prominences,...
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What Does the Sun’s X-Ray Flux Tell Us?
[Alex on EARTHSKY.ORG] Solar physicists often speak of the sun's X-ray flux as being high, or low. Solar flares are like waves on the background ocean of the sun's X-ray flux. The post What Does the...
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Why are East & West on the Sun Reversed?
[Alex on EARTHSKY.ORG] East and west on the sun are opposite from what you might expect. On the sun, east is to the left and west is to the right. Learn why here. (Image: NASA/SDO) The post Why are...
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Limb Darkening is an Optical Effect on the Sun
[Alex on EARTHSKY.ORG] Limb darkening is an effect we can see on the sun where the edges of the sun are darker than the center, due to the amount of photosphere we're looking at. The post Limb...
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What Makes a Giant Sunspot?
[Alex on EARTHSKY.ORG] A giant sunspot - AR 3190 - is crossing the face of the sun this week. It'lll soon disappear, but is still visible as of January 21, 2023. What makes it? The post What Makes a...
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Sun Causing Global Warming? 2 Reasons Why Not
[Alex on EARTHSKY.ORG] The sun influences the Earth's climate, but what is the sun's role in climate change? The post Sun Causing Global Warming? 2 Reasons Why Not appeared first on The Sun Today with...
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Q&A: What is the Sun’s Role in Climate Change?
[Alex on EARTHSKY.ORG] The sun influences the Earth's climate, but what is the sun's role in climate change? The post Q&A: What is the Sun’s Role in Climate Change? appeared first on The Sun Today...
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