heliacal , także: heliac

The end of the night was marked by the heliacal rising of a particular star.

Some stars, when viewed from a particular latitude on Earth, will not have a heliacal rising or setting.

On the heliacal settings and risings of the planets.

A star will reappear in the eastern sky at dawn approximately one year after its previous heliacal rising.

This is called a heliacal rising.

Therefore based on the heliacal rising method, the Age of Aquarius arrived about 1,080 years early than the modern system.

Every 8 years, Venus passes Regulus around the time of the star's heliacal rising, most recently in 2006.

The heliacal rising of Pleiades often marks important calendar points for ancient peoples.

The rising of a constellation just before sunrise (its heliacal rising) was considered the last hour of the night.

This significance led the Egyptians to base their calendar on the heliacal rising of Sirius.

The heliacal rising dates of 34 stars and constellations are given according to the 360-day 'ideal' calendar year.

This calendar begins on July 26 (heliacal rising of the star Sirius) and runs for 364 days.

The heliacal rising of the next decan star marked the start of a new civil week, which was then ten days.

Thus the heliacal rising of Sirius marked the annual flooding of the Nile.

Because the heliacal rising depends on the observation of the object, its exact timing can be dependent on weather conditions.

"Today's the heliacal rising of the Pleiades.

The Sothic year is the interval between heliacal risings of the star Sirius.

Three specific observations of the heliacal rise of Sirius are extremely important for Egyptian chronology.

For most Earth observers, the heliacal rising of Regulus occurs in the first week of September.

Sirius, its brightest star, means "scorching star", since the summer heat occurred just after Sirius' heliacal rising.

A 584-day Venus cycle was also maintained, which tracked the heliacal risings of Venus as the morning and evening stars.

Currently at the vernal equinox the constellation of Aquarius has been the heliacal rising constellation for some centuries.

The date of the temple's dedication on May 12 was aligned with the heliacal setting of the constellation Scorpio, the house of war.

Their year began when priests first remarked the asterism heliacal rising in the east, immediately before the sun's dawn light obliterated the view of the stars.

The heliacal rising of Sothis returned to the same point in the calendar every 1,460 years (a period called the Sothic cycle).