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The asterisk (/ ˈ æ s t ər ɪ s k / *), from Late Latin asteriscus, from Ancient Greek ἀστερίσκος, asteriskos, "little star", [1] [2] is a typographical symbol. It is so called because it resembles a conventional image of a heraldic star.
Alchemical symbols were used to denote chemical elements and compounds, as well as alchemical apparatus and processes, until the 18th century. Although notation was partly standardized, style and symbol varied between alchemists.
The origins of the planetary symbols can be found in the attributes given to classical deities. The Roman planisphere of Bianchini (2nd century, currently in the Louvre, inv. Ma 540) [2] shows the seven planets represented by portraits of the seven corresponding gods, each a bust with a halo and an iconic object or dress, as follows: Mercury has a caduceus and a winged cap; Venus has a ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 24 February 2025. Area of the sky divided into twelve signs For the East Asian zodiac, see Chinese zodiac. For other uses, see Zodiac (disambiguation). The Earth's orbit around the Sun causes the apparent motion of the latter along the ecliptic (red). Earth is axially tilted 23.4° relative to this plane ...
The Primordial Era is defined as "−50 < n < 5". In this era, the Big Bang, the subsequent inflation, and Big Bang nucleosynthesis are thought to have taken place. Toward the end of this age, the recombination of electrons with nuclei made the universe transparent for the first time. The authors discuss the horizon and flatness problems.
Fire during the winter solstice ceremony (Most Worshipful Grand National Mexican Lodge "Independencia No. 2") at the Tlatelolco Conventions Center (Manuel González 171, col. San Simón Tolnáhuac, del. Cuauhtémoc). In freemasonry, fire is present, for example, during the ceremony of winter solstice, a symbol also of renaissance and energy ...
The fourth shell contains one 4s orbital, three 4p orbitals, five 4d orbitals, and seven 4f orbitals, thus leading to a capacity of 2×1 + 2×3 + 2×5 + 2×7 = 32. [30] Higher shells contain more types of orbitals that continue the pattern, but such types of orbitals are not filled in the ground states of known elements. [ 45 ]
Fermilab director and subsequent Nobel Prize in Physics winner Leon Lederman was a very prominent early supporter – some sources say the architect [6] or proposer [7] – of the Superconducting Super Collider project, which was endorsed around 1983, and was a major proponent and advocate throughout its lifetime.