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The solar system
| Question | Answer |
|---|---|
| solar system | the sun and all of the planets and other bodies that travel around it |
| heliocentric | sun-centered |
| geocentric | describes something that uses earth as the reference point |
| parallax | an apparent shift in the position of an object when viewed from a different locations |
| gravity | a force of attraction between objects that is due to their masses |
| orbit | the path that a body 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 that is farthest from the sun |
| perihelion | the point in the orbit of a planet at which the planet is closest to the sun |
| centripetal force | the inward force required to keep a particle or an object moving in a circular path |
| solar nebula | 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 |
| terrestrial planet | one of the highly dense planets nearest 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 Uranus of Neptune |
| planetary ring | a disk of matter that encircles a planet and consists of numerous particles in orbit ranging in size from dust grains up to objects tens of meters across |
| dwarf planet | a celestial body that orbits the Sun, is nearly round in shape (achieves hydrostatic equilibrium), but has not cleared its orbital neighborhood of other debris, such as asteroids or other icy bodies. |
| Kuiper Belt | a region of the solar system that is just beyond the orbit of Neptune and that contains small bodies mostly made of ice |
| Kuiper belt object | an icy, small body orbiting the Sun in the region beyond Neptune, typically 30 to 50 astronomical units (AU) away |
| comet | Cooperative Program for Operational Meteorology, Education, and Training |
| Oort cloud | a theoretical, spherical shell of billions of icy bodies surrounding the Sun at the furthest edges of the Solar System |
| asteroid | its the Sun, primarily found in the main asteroid belt located between the orbits of Mars and Jupiter |
| meteoroid | a small, rocky or metallic body traveling through outer space, generally ranging in size from a small grain to about one meter wide |
| meteor | the streak of light, or "shooting star," produced when a small solid object (meteoroid) from space enters Earth's atmosphere at high speed and burns up due to friction, usually occurring in the mesosphere 76–120 kilometers above the ground |
| meteorite | a solid piece of debris—typically rock, metal, or a mixture of both—that originates in outer space, survives a fiery passage through the Earth's atmosphere, and lands on the surface of the Earth |
| nuclear fusion | the process by which nuclei of small atoms combine to form a new more massive nucleus the process realeases energy |
| sunspot | a dark area of the photospere of the sun that is cooler that is cooler than the surrounding areas and that has a strong surrounding |
| solar flare | an explosive release of energy that comes from the sun and that is associated with magnetic disturbances on the sun's surface |
| prominence | a loop of relatively cool incandescent gas that extends above the photosphere and above the sun's edge as seen from earth |
Created by:
Laila napier