The directional bearing of a star is given in terms of its right ascension round the celestial equator
In the southern hemisphere, the autumnal equinox corresponds to the center of the Sun crossing the celestial equator
moving northward and occurs on the date of the northern vernal equinox, meaning spring begins in Australia and South America.
Lepus: A constellation lying south of the celestial equator
and its more famous neighbour Orion, its name is Latin for "hare".
The phenomenon of similarity of the temporal change of the histogram shape near the moments of intersection of the celestial equator
by a celestial body appears to be independent of the nature of the body (whatever the Sun, the Moon, Venus, Mars or Mercury).
More coincidences are also happening here-Jupiter and Uranus find themselves close to the point on the sky known as the vernal equinox, where the Sun crosses the celestial equator
on the first day of spring.
Held between the historic axis of the Park and the N-S meridian line in plan, and clipped by the intersection between the axis of the North Star and the celestial equator
in elevation, the edges of the cone could not be anywhere else.
The equinox occurs twice per year when the sun crosses the celestial equator
and when night and day are nearly the same length.
See if you can feel the exact moment when the sun pulls even with the celestial equator
, the imaginary line running from the equator into space.
At this point also, the celestial equator
and the ecliptic equator will be at its farthest point.
In a fantasy photo-montage called Physics Illustrated, Caprice holds up the world for inspection, rides a crescent moon and sits astride the celestial equator
From the vantage point of the gate at sundown, the sun appears to descend into a narrow slot in the middle of the temple roof on the first day of fall and first day of spring - the two days the sun is directly on the celestial equator
We had been working some calibration stars near the celestial equator
, and I decided to swing the telescope to the zenith to obtain minimum background light and check performance in darker backgrounds.
At 11h 44m UT on March 20, the Sun sits on the intersection between the ecliptic and the celestial equator
, marking the northern hemisphere spring (vernal) equinox.
In this device the measuring piece of equipment with collimator was attached to the platform rotated in a plane of Celestial Equator
Winter solstice marks the beginning of winter when the sun is at its lowest elevation in the sky - as it moves south of the celestial equator
- and, thus, is the day with the shortest period of sunlight.