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Astronomy
space, and the physical universe as a whole.
| Question | Answer |
|---|---|
| Astronomy | space, and the physical universe as a whole. |
| Geocentric | having or representing the earth as the center |
| Heliocentric | having or representing the sun as the center |
| Ellipse | a regular oval shape |
| Astronomical | of or relating to astronomy. |
| Rotation | the action of rotating around an axis or center. |
| Revolution | a forcible overthrow of a government or social order in favor of a new system. |
| Perihelion | the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun. |
| Aphelion | the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun. |
| Phases of the moon | changing positions of the Moon and Sun relative to the Earth. |
| Solar Eclipse | an eclipse in which the sun is obscured by the moon. |
| Luner eclipse | an eclipse in which the moon appears darkened as it passes into the earth's shadow. |
| terrestrial planets | inner planets closest to the Sun |
| jovian planets | outter planets further from the Sun |
| Asteroid | a small rocky body orbiting the sun |
| comet | a celestial object consisting of a nucleus of ice and dust |
| meteroid | 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, becoming incandescent as a result of friction and appearing as a streak of light. |
| Meteorite | a meteor that survives its passage through the earth's atmosphere |
| Electromagnetic spectrum | the range of wavelengths or frequencies over which electromagnetic radiation extends. |
| Phonton | a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass. |
| Doppler Effect | an increase (or decrease) in the frequency of sound, light, or other waves |
| Refracting telescope | a telescope that uses a converging lens to collect light. |
| Reflecting telescope | a telescope in which a mirror is used to collect and focus light. |
| Radio telescope | an instrument used to detect radio emissions from the sky, whether from natural celestial objects or from artificial satellites. |
| Hubble Telescope | space telescope that was launched into low Earth orbit in 1990 |
| Space shuttle | a rocket-launched spacecraft, able to land like an unpowered aircraft, used to make repeated journeys between the earth and earth orbit. |
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