Lesson 4 Flashcards
Path between two nodes in an optical network between lights through unmodified
Light Path
Path between two nodes in an optical network between lights through unmodified
Light Path
imaginary sphere with earth at center
celestial sphere
stars, planets, constellations are embedded within sphere
celestial sphere
stars, planets, constellations are embedded within sphere
celestial sphere
points in celestial sphere that lie above earth’s opposite poles
celestial poles
Point at the very top of Earth’s axis rotation ( Arctic )
Geographic True North / True North
Point at the very top of Earth’s axis rotation ( Arctic )
Geographic True North / True North
northernmost earth’s surface, 90° latitude north
GNP / True North
point on earth’s surface where the planet’s magnetic field point’s vertical downwards
Magnetic North
point on earth’s surface where the planet’s magnetic field point’s vertical upwards
Magnetic South
star that lies very close to the north celestial pole
Polaris/ Polar Star/ Northern Star
Circle around the celestial sphere midway between the celestial pole
celestial equator
Celestial Equator / CE Circle around the celestial sphere midway between the celestial poles
Celestial Equator / CE
apparent path of the sun around the celestial sphere during a year
Ecliptic / E
Start of Vernal Equinox
March 21
Start of Summer Solstice
June 21
when is Autumnal Equinox
September 21
where the ecliptic and celestial equator intersect
Equinox
where the ecliptic and celestial equator intersect
Equinox
marked as Right ascension 0 hours
Vernal Equinox
marked as Right Ascension 12 hours
Autumnal Equinox
Location Map of the Philippines
Tropic of Cancer
23.4° North
what point of view is the:
Meridian / M
Horizon / H
Zenith / Z
Nadir / Na
Azimuth / Az
Altitude / Al
Cardinal Points
