SOS-703
Terms
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- meteoroid
- Body of rock or metal traveling through space.
- reflecting telescope
- Telescope in which a mirror gathers and focuses light and the resulting image is magnified by the eyepiece.
- telescope
- Instrument for making distant objects appear nearer, larger, and brighter
- treatise
- A formal written work dealing with some subject.
- apparent
- according to appearances; that which appears to be.
- heliocentric theory
- Having or representing the sun as the center.
- azimuth
- The angular distance along the horizon measured clockwise from the north toward perpendicular to the horizon.
- North Star
- The bright star directly above the North Pole.
- gravity
- The natural force that makes objects move or tend to move toward each other.
- altitude
- the height of a star, planet, or other heavenly body
- axis
- A straight line about which an object turns or seems to turn.
- ocular
- The eyepiece of a telescope or microscope.
- zenith
- Point in heavens directly overhead. The opposite of nadir.
- hemisphere
- Half of any sphere. Half of the celestial sphere is divided by the celestial equator, the ecliptic, or the horizon.
- aphelion
- the point in a planet's orbit that is farthest from the sun
- planet
- One of the heavenly bodies (except comets and meteoroids) that move around the sun in elliptical orbits
- revolves
- To move in a circle, move in a curve around a point.
- celestial
- Of the sky.
- horizon
- The line where the Earth and sky seem to meet; the great circle of the celestial sphere that has a plane parallel to the Earth's horizon and passes through the center of the Earth.
- wanderer
- The name given to the planets by the ancients because they appeared to wander among the stars.
- cosmology
- The science or theory of the origin and operation of the universe.
- zodiac
- Imaginary belt extending about 8° on both sides of the path of the sun, moon, and major planets.
- meteorite
- A mass of rock or metal that has impacted the Earth's surface from space.
- meteor
- A mass of rock or metal that enters Earth's atmosphere from space.
- myth
- Legend or story that usually attempts to account for something in nature.
- solar system
- The sun and all its planets, satellites, comets, and other heavenly bodies that revolve around it.
- retrograde
- Moving backward or in opposite direction.
- celestial sphere
- The imaginary sphere upon which the stars appear to enclose the visible universe.
- celestial equator
- The great circle that divides the celestial sphere into two imaginary equal halves, northern and southern.
- refracting telescope
- Telescope in which a lens gathers and focuses light and the resulting image is magnified by the eyepiece.
- perihelion
- The point in a planet's orbit that is nearest the sun.
- rotate
- To move around a center or axis.
- mythology
- A body of myths relating to a particular country.
- meteoric
- Having to do with meteors.
- summer triangle
- A group of three bright stars: Vega, Deneb, and Altair, especially prominent in the summer sky.
- celestial poles
- Each of the two points at which the Earth's axis, if extended, would touch the celestial spheres.
- eyepiece
- The lens, or set of lenses, in a telescope or microscope that is nearest the eye of the user.
- astronomy
- The scientific study of the celestial bodies.
- gravitation
- The force or pull in the universe that makes heavenly bodies tend to move toward each other.
- objective lens
- The primary light gathering lens or mirror on an optical instrument.
- ellipse
- An oval having both ends alike.
- astrology
- A supersititious or religious practice of using the stars for personal guidance.
- nadir
- The point in the heavens directly beneath where one is standing; point opposite zenith.
- orbit
- The path of the Earth or any planet around the sun.
- astrolabe
- Astronomical instrument used for measuring the altitide of the sun and stars. Replaced by the sextant.
- latitude
- Distance north or south of the equator measured in degrees
- Milky Way
- Galaxy made up of billions of stars which appears as a band of faint light stretching across the night sky.
- meteoritic
- Having to do with meteorites.
- revolution
- Movement around some point in a circle or curve.