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unit 3
| Question | Answer |
|---|---|
| solar system | The sun and all of the planets and other bodies that travel around |
| heliocentric | sun-centered |
| geocentric | describes something that uses Earth as the reference |
| parallax | An apparent shift in the position of a object from different locations |
| gravity | A force of attraction between objects that is due to their masses |
| orbit | The path follows as it travels around another body in space |
| aphelion | in the orbit of a planet or other body in the solar system the point farther away the sun |
| perihelion | The point in the orbit of a planet at which is closet to the sun |
| centripetal force | The inward force required to keep a particle or an object moving in a circular path |
| solar system | A rotating cloud of gas and dust from which the sun and planets formed |
| planetesimal | A small body from which a planet originated in the early stages of development of the solar system |
| nuclear fusion | The process by which nuclei of small atoms combine to form a new more massive nucleus the processes released by energy |
| sunspot | A dark area of the photosphere of the sun that is cooler then the surrounding areas and that has strong magnetic filed |
| solar flare | an explosive release of energy that comes from the sun and that is associated with magnetic disturbance on the sun surface |
| prominence | A loop of relatively cool incandescent gas that extends above the photosphere and above the sun edge as seen from earth |
| terrestial planets | One of the highly dense planets closet to the sun Mercury Venus Mars and Earth |
| astronomical unit | The average distance between Earth and the sun approximately 150 million kilometers symbol Au. |
| Gas giant | A Planet that has a deep massive atmosphere such as Jupiter Saturn Neptune Uranus |
| planetary ring | A disk of matter that encircles a planet and consists of numerous particles in orbits ranging in size from dust grains up to tens of meters across |
| Dwarf Planet | A celestial body that orbits the sun is round because of it own gravity but has not clear it's orbital path |
| Kuiper belt | A region of the solar system that is just beyond the orbit of Neptune and that contains small bodies made up of ice |
| Kuiper belt object | One of hundreds or thousands of minor planet sized objects that orbit the sun in a flat belt beyond Neptune orbit |
| comet | A small body that gives off gas and dust as it passes close to the sun a typical comet moves aro |
| oort cloud | A Spherical cloud region that surrounds the solar system that extends from the kuiper belt to almost halfway to the nearest star and that contains billions of comets |
| asteroid | A small rocky object that orbits the sun most asteroids are located in a band between the orbits of mars and jupiter |
| meteoroid | A reltivly small rocky body that travels through space |
| meteor | A bright streak of light that that results when a meteoroid burns up in Earth atmosphere |
| meteorite | A meteorite that reaches Earth surface without burning up up completely |
Created by:
Emanuel Barraza