Implying hereby the Heliacal ascent and Cosmical descent of those stars.
For as Geminus affirmeth, and Petavius his learned Commentator proveth, they began their account from its Heliacal emersion, and not its cosmical ascent.
The cosmical ascention of a Star we term that, when it ariseth together with the Sun, or the same degree of the Ecliptick wherein the Sun abideth: [SN: What the Heliacal ascent of Star is.
But the time observed by the Ancients was long after this ascent, and in the Heliacal emersion; when it becomes at greatest distance from the Sun, neither rising with it nor near it.
We recognize to-day this "heliacal rising" of the stars.
The heliacal rising of Orion is at present computed to be about the 6th of July; and about that time it is that he either causes or presages tempests on the seas.
If therefore Ilioneus, according to our supposition, understand the heliacalrising of Orion, Anna must mean the achronical, which the different epithets given to that constellation seem to manifest.
The heliacal rising of a constellation is when it comes from under the rays of the sun, and begins to appear before daylight.
They determined the length of their year by the heliacal rising of Sirius, 2782 years before the Christian era, which is the earliest epoch of Egyptian chronology.
I do not see how theheliacal rising of Sirius in any one year could help them to determine its length.
For had not the beginning thereof been now fixed, the Heliacal Risings and Settings of the Stars could not have been noted upon the days thereof.
The Priests of Egypt therefore in the Reign of Amenophis continued to observe the Heliacal Risings and Settings of the Stars upon every day.
This period, measured thus by the heliacal rising of Sothis, is spoken of as the Sothic cycle.
The more precise fixing of new year's day was accomplished through observation of the time of the so-called heliacal rising of the dog-star, Sirius, which bore the Egyptian name Sothis.
Yet, according to the calculations of Biot, the heliacal rising of Sothis at the solstice was noted as early as the year 3285 B.
On the contrary, the heliacal setting of a star is when the sun approaches conjunction so near as to render the star invisible.
Note: The heliacal rising of a star is when, after being in conjunction with the sun, and invisible, it emerges from the light so as to be visible in the morning before sunrising.
The first day of the Muhammadan month Jamada' l akhir, corresponding to the heliacal rising of the moon on that occasion, was Saturday, May 19.
The Muhammadan month begins with the heliacal rising of the moon, and this may have taken place on the 24th or 25th evening.
It seems to have been considered of great importance in ancient Egypt, as its heliacal rising announced that of Sirius, which heralded the annual rising of the Nile.
On the ceiling of the Memnonium at Thebes the heliacal rising of Sirius is represented under the form and name of Isis.
There are several with the goddess Isis in a boat, which we know, from the zodiac in the Memnonium at Thebes, was meant for the heliacal rising of the dog-star.
And the heliacal risings of Jupiter, as also, indeed, those of the other planets, are shown in almanacs for astrological purposes.
They approximated to the truth in reference to the solar year, by observing the equinoxes and solstices and the heliacal rising of particular stars.
The periodic time of Uranus, the nature of Saturn's ring, and the occultation of Jupiter's satellites are as far removed from the concerns of mankind as the heliacal rising of Sirius, or the northern position of the Great Bear.
The pernicious influence of the Dog-star is mentioned by Latin writers as being most pronounced during the dog-days, at the end of summer and commencement of autumn, the time of the heliacal rising of this star.
Their heliacal rising was considered a favourable time for setting out on a voyage, and their midnight culmination, which occurred shortly after the middle of November, was celebrated by some nations with festivals and public ceremonies.
And precisely at the moment of the heliacal rising of Arcturus, also rose Spica Virginis.
The heliacal rising of Canopus was also a precursor of the rising of the Nile.
So, because the heliacal rising of Sirius preceded the rising of the Nile, it was deemed to cause it; and other stars were in like manner held to cause extreme heat, bitter cold, and watery storm.
In Egypt, another reason was, that then the Nile began to overflow, at the heliacal rising of Sirius.
We have seen that on account of the vague character of the old Egyptian year the heliacal rising of Sirius shifted its place gradually through every month of the calendar.
On the ceiling of the Memnonium at Thebes the heliacal rising of Sirius is represented under the form and name of Isis (Sir J.
Thoth with the heliacal rising of Sirius in 139 A.
Astronomical data, especially the heliacal risings of Sothis recorded by dates of their celebration in the vague year.
The orientation of Egyptian temples and Druidical stones is such that possibly they were so placed as to assist in the observation of the heliacal risings [4] of certain stars.
Great progress was made when systematic observations began, such as following the motion of the moon and planets among the stars, and the inferred motion of the sun among the stars, by observing their heliacal risings--i.
The tribes of Vera Cruz, on the coast of Mexico, dated the beginning of their year from the heliacal setting of the Pleiades, which in the latitude of Vera Cruz (19 deg.
Both the Greeks and the Romans dated the beginning of summer from the heliacal rising of the Pleiades and the beginning of winter from their heliacal setting.
Brugsch states that the appearance of the said new moon, which was also associated with the heliacal rising of Sirius, would range from Aug.
According to an extremely ancient belief it was the goddess Hathor Isis-Sothis who caused the inundation of the Nile which, according to the inscriptions, coincided with the heliacal rising of Sirius.
The New Year festival, which coincided with the heliacal rising of Sirius (20th July, Jul.
