Tall-leksikon - Matematikk på nett - Nordreisa videregående skole

Dagens tall:
• The number of spots on a seven-spot ladybird
• The number of daughters of Atlas in the Pleiades (also called the "Seven Sisters")
• The number of stellar objects in the solar system visible to the naked eye from Earth— the Sun, the
Moon and the five classical naked eye planets: Mars, Mercury, Jupiter, Venus, and Saturn.
• Messier object M7, a magnitude 3.5 open cluster in the constellation Scorpius.
• The New General Catalogue object NGC 7, a 14th magnitude spiral galaxy in the constellation
Sculptor.
• The number of saints appearing in a constellation called "Saptharishi Mandalam" in Indian astronomy.
• The number of stars in the constellations of the Big Dipper and Orion.
• The Saros number of the solar eclipse series which began on -2590 April 8 and ended on -1310 May
16. The duration of Saros series 7 was 1,280.1 years, and it contained 72 solar eclipses.
• The Saros number of the lunar eclipse series which began on -2595 July 15 and ended on -1008
February 22. The duration of Saros series 7 was 1,586.6 years, and it contained 89 lunar eclipses.
• The Roman numeral VII stands for white dwarfs in the Yerkes spectral classification scheme.
• The Roman numeral VII (usually) stands for the seventh-discovered satellite of a planet or minor
planet (e.g., Jupiter VII).
• The seven-segment display, is an electronic device that uses seven
individual segments to create one digit; it is used in display devices
like digital clocks and some basic calculator screens, amongst others.
• The code for international direct dial phone calls to Russia and
Kazakhstan.
• In Microsoft's Rich Text Format specification, seven and all numbers
congruent to it modulo 256 refer to variants of the German language.
• System 7, a Macintosh operating system from the early 1990s
• Windows 7, the latest Microsoft operating system
• In the ASCII character set, the bell character
• There are Seven Tools of Quality
• There are seven classes of plastics used in packaging applications.
• The resin identification code used in recycling to identify "other" plastics such as
polycarbonate
• There are seven layers in the OSI model.
• There are seven logic gates. NOT, AND, OR, NAND, XOR, NOR, XNOR
In classical antiquity: Seven against Thebes.
• Seven Emperors (and period; Rome, history)
o Julius Caesar, Augustus, Galba, Hadrian, Nerva, Sallust, Vespasian
• Seven hills of Rome
• Seven Liberal Arts
• Seven Sages
• Seven Wonders of the ancient world
Religion:
• The mystical text The Seven Valleys, by the Prophet-Founder Bahá'u'lláh, relates the journey of the
soul through the seven "valleys" of Search, Love, Knowledge, Unity, Contentment, Wonderment, and
finally True Poverty and Absolute Nothingness.
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