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Celestial Sphere

Vocab for using the star charts

TermDefinition
Celestial Sphere Imaginary sphere surrounding our solar system where the stars are plotted
Right Ascension Hours, Min , Sec used to plot starts east of the Vernal Equinox
Declination degrees + (up) or - (down) of the celestial equator
Local Meridian Line directly overhead from Northern horizon to southern horizon
Apparent Magnitude How bright stars appear to us.
Zenith Directly above your head in the sky
Autumnal Equinox Sun shines on the equator giving Earth 12 hrs of daylight and 12 hrs of darkness - September
Winter Solstice Earth is tilted 23.5 degrees away from the sun. Dec
Vernal Equinox Sun shines on the equator giving Earth 12 hrs of daylight and 12 hrs of darkness - March
23.5 Degrees Earths tilt. (arctic circle, tropic of cancer, tropic of capricorn, antarctic circle
Aphelion Earth is farthest from Sun (June)
Perihelion Earth is closest to sun (Dec)
Summer Solstice Earth is tilted 23.5 degrees towards the sun. Dec
Ecliptic Curved line on your star chart that shows the Sun's path through the sky throughout the year.
Refractor telescope type of telescope that uses two lenses in a row and no mirrors
Newtonian Reflector telescope type of telescope that collects large amounts of light on a mirror and reflects it up the tube to an eyepiece
Catadioptric telescope type of telescope that uses a combination of lenses and mirrors
Created by: Langerphysics
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