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Stack #4664747
| Question | Answer |
|---|---|
| Geocentric | Term describing a model of the universe in which earth is at the center of the revolving planets and stars |
| heliocentric | Term describing a model of the solar system in which earth and the other planets revolve around the sun |
| ellipse | An oval shaped, which may be enlongated or nearly circular, the shape of the planets orbits |
| solar system | the system consisting of the sun and the planets and other objects that revolve around it |
| astronomical unit | A unit of distance equal to the average distance between earth and the sun |
| planet | an object that orbits a star, is large enough to be funded by its own gravity |
| dwarf planet | an object that orbits the sun and is spherical, has not cleared the area of its orbit |
| planetesimal | One of the small asteroid-like bodies that formed the building blocks into planets |
| core | the central region of the sun |
| nucelar fusion | the process in which two actomic nucei combine to form a larger nucelus forming a heavier element |
| radiation zone | A region of very tightly packed gas in the suns interior where energy is transfered mainly in the form of electromagnetics radiation |
| convection zone | the outermost layer of the suns interior |
| photosphere | the inner layer of the suns atmosphere that gives off its visible light |
| chromosphere | The middle layer of the suns athmosphere |
| corona | the outer layer of the suns athmosphere |
| solar wind | A stream of electrically charged particals that emanate from the suns corona |
| sunspot | a dark area of gas on the suns surface that is cooler than surrounding gases |
| prominence | a huge reddish loop of gas that protudes from the suns surface |
| solar flare | the eruption of gas from the suns surface that occurs when the moon is directly between the sun and earth |
| terrestrial planet | the name often given |
| greenhouse effect | a natural process that warms the Earth's surface by trapping heat from the sun through greenhouse gases in the atmosphere. |
| gas giant | a large planet primarily composed of hydrogen and helium, with a massive atmosphere and no well-defined solid surface. |
| ring | a ring-shaped or circular object |
| asteroid belt | a torus-shaped region of space in the Solar System located between the orbits of Mars and Jupiter |
| Kuiper belt | a circumstellar disc in the outer Solar System, extending from the orbit of Neptune at about 30 astronomical units |
| Oort cloud | a theoretical, distant, spherical shell of icy bodies surrounding the Sun |
| comet | small celestial body composed primarily of ice, dust, and rocky material that orbits the Sun and develops a glowing coma and tail when heated by solar radiation. |
| coma | a state of deep unconsciousness |
| nucelus | central and most important part of an object |
| asterioid | a small, rocky or metallic body that orbits the Sun |
| meteoroid | a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere. |
| meteor | a small body of matter from outer space that enters the earth's atmosphere |
| meteorite | a fragment of extraterrestrial matter—originating from space—that has survived its passage through a planet’s atmosphere and landed on the surface of that planet or moon |
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user-1975220