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At the equator, the solar rotation period is 24.47 days. This is called the sidereal rotation period, and should not be confused with the synodic rotation period of 26.24 days, which is the time for a fixed feature on the Sun to rotate to the same apparent position as viewed from Earth (the Earth's orbital rotation is in the same direction as the Sun's rotation).
- How We Know The Sun Rotates
- Is The Sun's Rotation Different?
- Why Does The Sun rotate?
- Additional Resources
- Bibliography
The discovery that the sun rotates dates back to the time of Galileo Galilei, according to The British Library. Along with several of his contemporary earlier astronomers, Galileo had observed dark spots of the sun that we now call sunspotsand understand to be important parts of the solar cycle. Galileo noticed something else too. He found these da...
While Earth and the other inner planets are composed of solid rock, the sun is an ultra-hot ball of dense ionized gas — mainly hydrogen and helium— called plasma. That means that the way it rotates is different than the way our planet, Mars, Venus, and Mercurydo. The sun experiences something called differential rotation. This means that its rotati...
The sun's counterclockwise rotation and the counterclockwise rotation of the entire solar system (except two planets) is a result of its formation around 4.5 billion years ago. At this point in the universe's history, the solar system was no more than a giant rotating disc of gas and dust. NASA Science suggeststhat an exploding star caused this to ...
Discover how NASA and the ESA are investigating the core of the sun including the rate at which it rotates at NASA's SOHO page. Additionally, you can learn more about the solar system's rule breakers Venus and Uranus and their retrograde rotation at the Science Alert website.
"Galileo's sunspot letters". The British Library (2022). "Solar Rotation Varies by Latitude". NASA (2013). "Discoveries and Opinions of Galileo" (Doubleday, 1957). "ESA, NASA’s SOHO Reveals Rapidly Rotating Solar Core". NASA (2017). "Our Solar System". NASA Science, Solar System Exploration(2021). "Why Does the Sun Rotate?". National Radio Astronom...
The core is the hottest part of the Sun. Nuclear reactions here – where hydrogen is fused to form helium – power the Sun’s heat and light. Temperatures top 27 million °F (15 million °C) and it’s about 86,000 miles (138,000 kilometers) thick. The density of the Sun’s core is about 150 grams per cubic centimeter (g/cm³).
Jun 3, 2016 · On average, the sun rotates on its axis once every 27 days. However, its equator spins the fastest and takes about 24 days to rotate, while the poles take more than 30 days. The inner parts of the ...
Mar 13, 2012 · A spot on the equator of the Sun takes 24.47 days to rotate around the Sun and return to the same position. Astronomers call this sidereal rotation period, which is different from the synodic ...
Nov 7, 2019 · The gasses and plasma near the sun’s equator rotate around the sun’s axis every 25 days. As you move towards the sun’s poles, the rotation speed slows. Near the north and south poles, the sun rotates once every 36 days. That means the sun’s poles take 11 more days to rotate around the sun’s axis than its equator.
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The chromosphere is a thin layer on top of the photosphere at a temperature of about 10 000 K. The corona, together with the chromosphere, forms the Sun's atmosphere. This region is at a temperature of about 2 million K. A group of sunspots (or sunpot complex, called Active Region 1967, that is 180 000 km across (larger than the Jupiter planet).
