Term
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Definition
1. Corona
2. Radiative and Convection Zones
3. Photosphere
4. Chromosphere
5. Corona |
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Term
| How do astronomers observe the Rotation of the Sun? |
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Definition
| By recording the speed of sunspots across the photosphere. |
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Term
| What is the Rotation Period of the Sun at the Equator? |
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Definition
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Term
What is the Rotation Period of the Sun at the Poles? |
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Definition
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Term
| What diagram is used to measure the pattern of Sunspots? |
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Definition
| The Butterfly Diagram which shows an 11 year cycle of sunspots. |
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Term
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Definition
Areas on the photosphere of the Sun that are cooler than the surrounding area and so appear darker. |
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Term
| How are Sunspots created? |
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Definition
Sunspots are caused by local changes in the Sun's magnetic field. When this field is stronger in one region, the convention abilities are diminished and so the hotter gases from below do not affect that region temporarily.Their duration may vary from several hours to months. |
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Term
| What is the darker part of a Sunspot called? |
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Definition
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Term
What is the lighter part of a Sunspot called? |
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Definition
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Term
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Definition
| Clouds and formations of bright gases expelled from the sun and stretch large distances from its surface. They are mistaken for flames. Magnetic forces work to often drag them back.They stretch from the chromosphere through the corona. |
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Term
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Definition
| Flares are violent ejections of solar material from the Sun's photosphere. Often violent eruptions or releases of gas from the Sun usually originating from Sunspot areas have been detected to emit gamma and radio radiation. |
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Term
| What reaction takes place in the Core? |
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Definition
Nuclear fusion (where atomic nuclei fuse to form a heavier nucleus with the release of energy) takes place. 600 million tonnes of hydrogen are converted into 596 million tonnes of helium every second. The remaining four million tonnes gets converted into heat and light.
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Term
| What Wavelength allows astronomers to study the surface of the Sun? |
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Definition
| H-Alpha is a specific wavelength in the visible part of the spectrum. Optical filters are attached to a telescope allowing the observer to study the sun. |
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Term
| What temperature does Nuclear Reactions require? |
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Definition
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Term
| How old is the Sun considered to be? |
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Definition
The Sun is 5 billion years old and considered to have already used up half its hydrogen gas. |
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Term
| What is the Suns diameter? |
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Definition
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Term
| What is an Astronomical Unit? |
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Definition
| The mean distance from the Sun to the Earth. (150 million km = 1AU) |
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Term
| What is -273oC (Absolute 0) in Kelvin? |
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Definition
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Term
| What is the Temperature of the Photosphere? |
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Definition
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