The reason for this is that the Sun does not stand still on the celestial sphere, and the stars do (except for a tiny proper motion). The sun moves about 1° per day eastwards over a great circle known as the ecliptic (which is 360° or a full circle in one year, the annual motion of the Sun). As an angle of 1° corresponds to 4 minutes in time (360° = 24 hours), we need therefore four extra minutes of diurnal motion to see the Sun back on the same meridian again, making the duration of one rotation just 24 hours exactly (on the average, ignoring small seasonal variations, see equation of time)
Normal clocks therefore indicate solar time. Astronomers studying the movements of stars may want clocks indicating sidereal time, going around once in 23h56m (solar time units).
A celestial sphere can also refer to a physical model of the celestial sphere or celestial globe.
Such globes map the constellations on the "outside" of a sphere, resulting in a mirror image of the constellations as seen from Earth. The oldest surviving example of such an artefact is the globe of the Farnese Atlas sculpture, a 2nd-century copy of an older (Hellenistic period, ca. 120 BC) work.
Capricornus
Capricornus is one of the constellations of the zodiac. It is often called Capricorn, especially when referring to the corresponding astrological sign. Its name is Latin for "horned male goat" or "goat horn", and it is commonly represented in the form of a sea-goat: a mythical creature that is half goat, half fish. Its symbol is (Unicode ♑).
Capricornus is one of the 88 modern constellations, and was also one of the 48 constellations listed by the 2nd century astronomer Ptolemy. Under its modern boundaries it is bordered by Aquila, Sagittarius, Microscopium, Piscis Austrinus and Aquarius. The constellation is in an area of sky called the Sea or Water, consisting of many water-related constellations such as Aquarius, Pisces and Eridanus.
Capricornus is the second faintest constellation in the zodiac after Cancer. Its brighter stars are on a triangle whose corners are α Capricorni (also known as Giedi), δ Capricorni (Deneb Algiedi), and ω Capricorni.
Capricorn has several galaxies and clusters. Messier 30 is a globular cluster that is one degree south of the galaxy group NGC 7103. The constellation also harbors the wide spiral galaxy NGC 6907.
Despite it being very faint, Capricornus has one of the oldest mythological associations. It has consistently been represented as a cross of a goat and a fish since the Middle Bronze Age. The earliest picture of Capricornus is on a cylinder-seal dating c. 21st century BCE. From the mid second Millennium it became a popular motif on boundary stones. It was explicitly recorded in the Babylonian star catalogues as "The Goat-Fish" before 1000 BC. The constellation was a symbol of Ea and in the Early Bronze Age marked the winter solstice.
Because of the precession of the equinoxes the December solstice no longer takes place while the sun is in the constellation Capricornus. The astrological sign called Capricorn now begins with the solstice. The sun's most southerly position is now called the Tropic of Capricorn. This term also applies to the line on earth where the sun is directly overhead at noon on that solstice.
The planet Neptune was discovered in this constellation by German astronomer Johann Galle, near Deneb Algedi (δ Capricorni) on September 23, 1846, which is reasonable as Capricornus can be seen best at 4:00am in September.
In Chinese astronomy, constellation Capricornus is in "The Black Tortoise of the North" (北方玄武, "Běi Fāng Xuán Wǔ").
Capricorn the sea goat was a goat that decided to take over the world. The gods of Greece looked down upon that and sent there wrath and killed him with one of Zeus thunderbolts. Then they hung him in the sky to humiliate him.
As of 2002, the Sun appears in the constellation Capricornus from January 19 to February 15. In tropical astrology, the Sun is considered to be in the sign Capricorn from December 22 to January 19, and in sidereal astrology, from January 15 to February 15.
Ptolemy's method of connecting the stars of Capricornus has been influential.
H. A. Rey has suggested an alternative way to join the stars, which graphically shows a goat. The goat's head is formed by the triangle of stars ι Cap, θ Cap, and ζ Cap. The goat's horn sticks out with stars γ Cap and δ Cap. Star δ Cap, at the tip of the horn, is of the third magnitude. The goat's tail consists of stars β Cap and α Cap: star β Cap being of the third magnitude. The goat's hind foot consists of stars ψ Cap and ω Cap. Both of these stars are of the fourth magnitude.
USS Capricornus (AKA-57) is once of United States navy ship.
SV Ried
SV Ried is a soccerclub from Austria, playing in the Bundesliga, the highest class in Austria.
The club was founded in 1912 and played till 1955 in Upper Austrias footballleague. With some up and downs they reached the 1. Landesliga(highest class in Upper Austrian football) in 1976. 1988 and 1990 they won the Championship but failed to reach the 2. Division(at that time second level in Austrian football). 1991 they promoted after the third title to the 2.Division.
After four years in this class they promoted to the highest class in Austrian football. From 1995 to 2003 they played in the Bundesliga, but in the season 2002/2003 they only reached the 10th place and were relegated to the First Division. 2005 they reached the title of the second league and came back to the Bundesliga. 77 points are a all-time point record for the second level in Austrian football.
2007 they were runner-up in the Bundesliga and 1998 and 2011 they won the Austrian Cup. In the Cup Winners Cup 1998/1999 they reached the 3rd round.
Navarre
Navarre is an autonomous community in northern Spain. The capital of Navarre is Pamplona.
When the Roman Empire existed, most of the people who lived in Navarre were the Vascones.
Barbary falcon
The Barbary falcon ("Falco pelegrinoides") is a species of bird. It is a medium-sized falcon about the size of a crow. This bird of prey breeds in the Canary Islands and on the coasts of North Africa. It is mainly resident. It is thought to be related to the peregrine falcon.
L-DOPA
Levodopa, or -DOPA is an amino acid. In the body of mammals, it is made from Tyrosine in a process named synthesis. It also occurs in different plants. As such it can be used as a dietary supplement. L-Dopa is the precursor to the neurotransmitters dopamine, norepiphedrine and epiphedrine, which are part of a group known as Catecholamines. L-dopa can also be used as a drug for diseases such as Parkinson's disease. The substance used in the drug is usually called "Levodopa", and the naturally occurring substance is called "L-Dopa".
Austrobaileyales
Austrobaileyales is the botanical name for an order of flowering plants. There are about 100 species of woody plants, perhaps the most famous of which is the spice star anise, from "Illicium verum".
The APG system, of 1998, did not recognize such an order. However, the APG II system, of 2003, did accept this order and placed it among the basal angiosperms.
Chloranthaceae
Chloranthaceae is the botanical name of a family of flowering plants. The family consists of four genera, totalling several dozen species, of herbaceous or woody plants occurring in Southeast Asia, the Pacific, Madagascar, Central & South America, and the West Indies. The flowers are inconspicuous, and arranged in inflorescences. Petals are absent in this family, and sometimes so are sepals. The flowers can be either hermaphrodite or of separate sexes. The fruit is drupe-like, consisting of one carpel.
Creodont