Easter feast days are moveable days, in that they don't fall on a fixed date in the normal Gregorian or Julian calendars, which follow the cycle of the sun
The solar day is the light and the dark cycle of the sun
setting and rising.
The role and cycle of the sun
is captured in the sequences that illustrate the differing positions of light illuminating the dark interior.
Other activities included lectures on the life cycle of the sun
, possibility of life beyond Earth and tips on how to view Mars - which in August will be at its closest proximity to Earth in centuries.
In early modern Europe the best way to measure the annual cycle of the sun
was to construct a level line from south to north on the floor of a large dark building with a hole in its south wall or roof.
It has a part which lives for one cycle of the sun
The position of stars, the cycle of the sun
and moon, and the migratory habits of animals were all elements used by the Inuit to judge time.
Experts say, given the chance, our bodies naturally adjust to the light-dark cycle of the sun
Whereas past surveys of stars have found cycles similar to the 11-year cycle of the Sun
, this star has a cycle of less than a year.
If these relationships are shown to be valid, the churning of Creation mimics the annual cycle of the Sun
, which seasonally establishes the pattern of cosmic order.
Easter and the many church holidays related to it such as Ash Wednesday, Palm Sunday and Good Friday are called "moveable feasts," because they don't fall on a fixed date on the Gregorian calendar, which follows the cycle of the sun
and the seasons.