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1.4 million km
What is the diameter of the Sun (in km)?
5,800 °K
What is the temperature of Photosphere?
150 million km
What distance is the Sun from the Earth (in km)?
2 Million °K
What temperature of the Sun's Corona?
Chromosphere
What is the name of the sphere of colour, pink rim around Sun?
Corona
What emits X-rays and solar wind, contains high velocity solar particles?
Photosphere
What is the sphere of light called?
Sunspots
What are areas on the photosphere of the Sun that are cooler than the surrounding area and so appear darker called? (They correspond to localised magnetic fields.)
Penumbra
What is the lighter areas surrounding a sunspot (200°K cooler than photosphere) called?
Umbra
What is the darker region of sunspot (2000°K cooler than photosphere) called?
Rotation period
What is 25 days at the Equator, 36 days at the Poles?
11 years
What age are the Sunspot (roughly)?
The Sun's rotation
What is achieved by recording a group of the Sunspots, and time how long it takes for them to reach the same position?
Proton - proton chain.
How is the Sun's energy generated?
How do Astronomers view the Sun at different wavelengths?
By using scientific instruments on space probes and solar observatories.
Solar Wind
What is a steady stream of charged particles from the Corona called?
400 km/s
What is the speed of Slow Solar Wind (in km/s)?
850 km/s
What is the speed of Fast Solar Wind (in km/s)?