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What was the Star of Bethlehem? Detailed answer

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What was the Star of Bethlehem?

This question has not yet been answered unambiguously. For the first time it was put by the "legislator of the sky" German astronomer Johannes Kepler (1571-1630). He calculated that in 7 BC. e. the planets Saturn and Jupiter converged in the constellation Pisces and were observed as one very bright star.

The date of the birth of the Savior, according to the Evangelist Matthew, fell on the time of the reign of Herod in Judea. According to the Roman and Jewish historian and writer Flavius ​​Josephus, King Herod died on the night of March 12-13, 4 BC. e.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

How are the names for the satellites of the planets of the solar system chosen?

As a rule, the names of satellites are associated with the names of the planets around which they revolve. So, the satellites of Mars Phobos (Fear) and Deimos (Horror) are named after the ferocious twin sons of the ancient Greek god of war Ares, identified with the Roman god of war Mars. The names of the Galilean satellites of Jupiter embody the names of the beloved heads of the Olympic gods Zeus - the princesses Io and Europe and the nymph Callisto, as well as the Trojan prince Ganymede, who was kidnapped by Zeus and became his butler (as you know, the cult of Zeus merged with the cult of the main god of the Romans Jupiter).

Most of the non-Galilean satellites of Jupiter are also named after characters in Greek mythology, one way or another connected with Zeus: Metis - the first wife of the Thunderer, Adrastea - the nymph who nursed the baby Zeus, Amalthea - the goat whose milk the baby Zeus was fed, etc. Names of characters Greek and Roman myths are also embodied in the names of the satellites of Saturn, Neptune and Pluto.

A somewhat different tradition manifested itself in the names of the satellites of Uranus. It was started by William Herschel, who discovered Uranus and its first two satellites. Herschel named them after the king of the fairies and elves Oberon and his wife Titania - the characters in W. Shakespeare's play "A Midsummer Night's Dream". Subsequently, the environment of Uranus was replenished by the little elf Pack, the spirit of the air Ariel, the eternally young Desdemona, Juliet and Ophelia, the ungrateful Cordelia (the youngest daughter of King Lear) and other Shakespearean characters.

The five satellites of Uranus, moving around the planet in the opposite direction, and besides having anomalously elongated orbits, received the names of obviously negative heroes of Shakespeare's drama "The Tempest": the wild ugly slave Caliban and his mother, "crooked from years and malice" Sycorax, their god Setebos, master of the spirits of Prospero (former Duke of Milan) and the drunken butler Stefano, who wanted to become the king of the island.

And only two satellites of Uranus are not "Shakespearean", but are associated with the poem of the English poet Alexander Pope "The Abduction of the Lock". These satellites are named after the main character Belinda and the gloomy and woeful spirit Umbriel.

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Super glue that can withstand record temperatures 24.07.2022

Chemists at Tsinghua University in Beijing have developed a promising mixture for combining different items at extreme temperatures. The new adhesive withstands from -196 to 200 degrees Celsius and can be reused.

The new adhesive will be useful in heavy industry and aerospace applications such as rockets that face temperature fluctuations. The new substance belongs to the class of supramolecular adhesives.

The parts of the mix are specially designed to self-assemble into strong bonds during the curing process. The authors reported that one of the components is a ring-shaped molecule known as a crown ether, while the other is a small protein produced by bacteria.

When the described components come into contact and the mixture is heated, the crown ether rotates the protein and securely fastens any surface. In a series of tests, the scientists glued two steel plates together and found that they could withstand up to 22 megapascals. At the same time, the glue worked not only at room temperature, but also in any range of -196 to 200 °C. It also showed high strength characteristics when working with other materials and did not disintegrate even under water.

The team attributed the success to strong supramolecular interactions—a strong bond displaces water from a protein. This means that when the temperature drops, ice crystals cannot form and break the material, as often happens with other adhesives. An added bonus of the new technology is its reusability. The blocking adhesive components can be dismantled and recycled, after which the updated mixture can hold new materials together with the same strength.

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