Our Sun
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Created by:
awagner123 on January 9, 2011
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29 terms
Terms | Definitions |
|---|---|
 a star | What is the Sun? |
| Nuclear fusion | How do stars get their energy? |
| 93 million miles | How far is the Sun from Earth? |
| January 1st (Perihelion) | When is the Earth closest to the Sun? |
| July 1st (Aphelion) | When is the Earth farthest from the Sun? |
| Fusion | Combines atoms of lighter elements into heavier elements. |
| Plasma | the 4th state of matter and is the result of great heat and pressure. |
| E=mc2 | E = energy m = mass c = speed of light What is Einstein's equation for energy? |
| Photosphere | the visible surface of the Sun |
| Chromosphere | the inner layer of the Sun's atmosphere. It extends thousands of Km. |
| Corona | Sun's thin outer atmosphere |
| Sun Spots | Dark spots on the photosphere. |
| Solar Wind | a constant stream of electrically charged particles from the corona. |
| Auroras | caused as the solar wind passes through the Earth's magnetic field at the poles. |
| Coronal holes | a hole in the corona giving off huge amounts of solar wind |
| Solar Flares | outbursts of light from sun spots giving off large amounts of solar wind. |
| Magnetic Storms | caused by particles coronal holes and solar flares are added to the solar wind. These storms may interrupt cell phones, radios, TV's, etc |
| Ptolemy | Who developed the Geocentric Model? |
| Geocentric | Model predicted where planets would appear in the sky |
| Geocentric | means "Earth Centered" |
| Nicholas Copernicus | developed the Heliocentric Model |
| Heliocentric Model | This theory explained that the Earth was just a planet like the others orbiting around the sun |
| Heliocentric | means "Sun Centered" |
| Tycho Brahe | devised his own instruments to study the Moon and Planets |
| Johannes Kepler | developed 3 Laws of Planetary Motion |
| Isaac Newton | developed the Law of Universal Gravitation |
| Isaac Newton | invented Calculus and modern Physics |
| Galileo Galilei | invented the telescope |
| Galileo Galilei | discovered sunspots and craters on the Moon |
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