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Astronomy- The Sun
Part B- Uni 5
| Question | Answer |
|---|---|
| chromosphere | middle layer of the sun's atmosphere; usually invisible from Earth (except total eclipse turns it red) |
| convection zone | Outer layer of the sun before the atmosphere starts; extends from surface to 200,000 Km. |
| core | The interior or center part of the Sun; temp is about 27 mil degrees F; where fusion occurs to create energy/radiation |
| corona | The outermost layer of the Sun’s atmosphere; extends millions of Km out from sun; its volume is larger than the sun itself! |
| Coronal mass ejection (CME) | a large bubble of charged particles and gas from the corona that travels out from the sun. It interacts with earth's ionosphere and is the cause of Aurora Borealis. |
| deuterium nucleus | has one proton and one neutron; a step in the proton-proton chain reaction that takes place during fusion. |
| gravitational equilibrium | the balance of gravity pulling inward at the same time that pressure is pushing out. |
| Law of universal gravitation | how objects in space attract each other with a force equal to the product of their masses, divided by the square of the distance between the objects’ centers. (simply put... gravitational force is determined by the objects mass and distance) |
| neutrino | subatomic particle with very little mass |
| nuclear fusion | when two atomic nuclei combine, or "fuse," to form one heavier nucleus. During this process, hydrogen is converted into helium. |
| nuclear fission | the nucleus of an atom splits into smaller parts. |
| proton-proton chain reaction | Energy is created through this process of nuclear fusion |
| photosphere | The Sun’s visible surface, or the lowest layer of the Sun’s atmosphere. |
| radiative zone | Located about one-third of the way from the surface of the Sun to the core.: plasma is calm compared to the surface but the visible light is trillions times brighter. |
| solar eclipse | when the moon passes between the sun and the earth and blocks the sun (Think solar= day time eclipse) |
| solar flares | magnetic storms on the surface of the sun that create eruptions of charged particles and x-rays into space. |
| solar prominences or filaments | loops of trapped gas; can rise up to 100,000 km above the sun's surface. |
| sun | the center star of our solar system; consisting of plasma and magnetic fields. |
| sunspots | cooler than the other areas of the sun's surface; they appear less bright or even dark/ |
| sunspot cycle | a pattern of solar activity where the average number of sunspots gradually increases or decreases. |
Created by:
aguy14
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