great circle articles
What geometry defines a great circle on a sphere's surface?
Which specific terrestrial line is cited as a perfect example of a great circle?
What critical function does a great circle serve for distance planning?
What is the primary function of projecting the cosmos onto the celestial sphere?
What specific physical feature is the celestial equator a direct projection of?
What specific declination value ($\delta$) marks the celestial equator?
For an observer standing on the Earth's physical equator, where does the celestial equator appear?
What apparent path does the ecliptic great circle represent on the celestial sphere?
What geometric difference defines the celestial equator versus the ecliptic?
What are the two intersection points between the celestial equator and the ecliptic called?
What imaginary great circle on the celestial sphere represents the precise plane in which the Earth orbits the Sun?
What is the approximate tilt of the Moon’s orbital plane relative to the plane of the ecliptic?
What angle is formed where the ecliptic intersects the celestial equator?
What historical concept defines the zero point ($0^ ext{o}$ longitude) for measuring angular positions eastward along the ecliptic?
What phenomenon causes the difference between the apparent solar day and the sidereal day?
How many constellations, recognized by modern astronomical boundaries, does the Sun actually pass through along the plane of the ecliptic?
Which constellation is the thirteenth constellation located along the ecliptic that is not included in the traditional twelve signs of the zodiac?
What term describes the slow shift in the 'First Point of Aries' location due to the wobble of Earth's axis?
Where on Earth will an observer find the Sun directly overhead (at the zenith) at local noon on the day of the June solstice?