| A | B |
|---|
| prominences | Loops of gas that are relatively cool which extend into the outer atmosphere from the photosphere |
| solar flare | explosive release of energy that extends as far out as the sun's outer atmosphere |
| sunspots | formation of dark areas on sun's surface |
| nuclear fusion | process where 2 or more atomic nuclei with low mass, fuse to form heavier nuclei |
| planetesimals | large bodies where planets are formed |
| solar nebula | cloud responsible for the formation of ht solar system |
| centipetal force | inward force that causes objects to move in a circular pattern |
| parihelion | objects point that is closest to the sun when orbiting it |
| aphelion | objects point that is farthest to the sun when orbiting it |
| gravity | force of attraction between objects due to their masses and their distances |
| orbit | path followed by a celestial body as it travels around another body |
| geocentric | Earth-centered model of the solar system |
| heliocentric | sun-centered model showing the bodies orbiting the sun |
| solar system | consists of the sun and all bodies that orbit it |
| parallax | the apparent shift of an object's position when that object is viewed from another location |
