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Astronomy

QuestionAnswer
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.
Created by: 3093501
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