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Astronomy
| Question | Answer |
|---|---|
| Electromagnetic Spectrum | The arrangement of electromagnetic radiation according to wavelength |
| Orbit | The curved path of a celestial object or spacecraft around a star, moon, or planet espcially a periodic elliptical resolution |
| Reflecting Telescope | A telescope that concentrates light from distant objects by using a concave mirror |
| Refracting Telescope | A telescope that uses a lens to bend and concentrate the light from distant objects |
| Satellite | An artificial body placed in orbit around the earth or moon or another planet to collect information on or for communication |
| Space Station | A large artificial satellite designed to be occupied for long periods and serve as a base, for scientific observation |
| Axis | An imaginary straight line passing through the North Pole, the center of the earth, and the South Pole |
| Ellispe | An oval |
| Equinox | The time or date at which the sun crosses the celstial equator, whend ay or night are at equal length |
| Full Moon | The phase of the moon when its whole disc is illuminated |
| Lunar Eclispe | An eclispe of the moon; A lunar eclispe occurs when the moon passes through earth's shadow |
| Moon Phase | The shape of the sunlit portion of the moon as seen by an observer of earth |
| New Moon | The phase of the moon when its whole is disc isn't illuminated |
| Revolution | The movement of one object around the center of another object |
| Rotation | The process or act of turning or circling around something |
| Solar Eclispe | When the sun is obscured by the moon |
| Solstice | When the sun reaches its highest and lowest point in the sky at noon, marked by the longest and shortest days |
| Asteroid | A large, irregularly shaped object in space that orbits our sun. It like a comet |
| Comet | A celestial object consisting of a nucleus of ice and dust and, when near the sun, a "tail" of gas and dust particles pointing away from the sun |
| Meteor | A small body of matter from outer space that enters the earth's atmosphere, become incandescent as a result of friction and apperiaing as a streak of light |
| Meteorite | A meteor that survive its passage through the earth's atmosphere such that part of it strikes the ground |
| Solar System | The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteroids, and comets |
| Black Hole | A region of space having a gravitational field so intense that no matter or radiation can escape |
| Constellation | A group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. Modern astronomers divide the sky into eighty-eight constellations with defined boundaries. |
| Chromosphere | A reddish gaseous layer immediately above the photosphere of the sun or another star. Together with the corona, it constitutes the star's outer atmosphere. |
| Corona | A corona is an aura of plasma that surrounds the sun and other stars. |
| Galaxy | A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. |
| Light Year | A unit of length in astronomy equal to the distance that light travels in one year in a vacuum or about 5.88 trillion miles (9.46 trillion kilometers) |
| Nebula | A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter. |
| Neutron Star | A celestial object of very small radius (typically 18 miles/30 km) and very high density, composed predominantly of closely packed neutrons. |
| Supergiant | A very large star that is even brighter than a giant, often despite being relatively cool. |
| White Dwarf | A small very dense star that is typically the size of a planet. A white dwarf is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula. |
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