PLATINO

What is platinum?

Platinum is a chemical element with the atomic number 78 and Pt. as its abbreviation. It is a malleable, dense, precious highly unreactive greyish-white transition metal. Due to its remarkable resistance to corrosion, even at high temperatures, it is considered a noble metal. Its name derives from the Spanish word 'platina' due to its resemblance to silver.

It was officially discovered in 1748 in South America by a writer named Antonio de Ulloa. Though its discovery can be considered somewhat recent, it has been used as far back as over 3000 years ago in Ancient Egypt.

Where did platinum come from?

Platinum comes from merging neutron stars, which is a phenomenon that happens when a star dies and instead of ending in a supernova, it collapses until it reaches a point where its mass doubles that of our Sun while spinning 40.000 times per minute. When two of these neutron stars collide, they produce not only gravitational waves, they also release a gamma ray explosion, causing material to fly out at high speeds, eventually creating heavier elements. (for learing more, make a click over the coloured bottons at the top of this page)

Let's divert from platinum to complete the english course...the ptolomaic system was not so ludicrous

Mathematician and astronomer Claudius Ptolemy was probably born in what is today the country of Egypt, around 100 AD, and he lived later in the city of Alexandria. Ptolemy is a Greek name, however, and so he probably was of Greek descent (which was also part of Rome at the time). Besides his main accomplishments, little else is known about Ptolemy's life. The timing of his literary works suggests he died in about 170 AD.

Ptolemy published 'The Almagest', in 150 AD, after having spent twenty-five years studying the stars and the night sky. Ptolemy astronomy assumed that the motions of the heavenly bodies could be explained with mathematics, and so 'The Almagest' contains reports of his observations during that time. His later works established his views on cosmology, and the Ptolemaic System, which put Earth at the center of the universe, would persist as an accepted model for more than a thousand years.

The Almagest put forth the idea that the motions of the heavenly bodies can be explained with mathematics. The Ptolemaic System described, then, a cosmos that worked in a mathematical, predictable manner. Since it was a geocentric system, the heavens became a rather complicated place, with the sun, moon, and planets all moving in intricate, circular paths called epicycles, though these paths did explain their apparent behavior. The Almagest included charts for over a thousand stars and forty-eight constellations. Much of that information possibly came from his predecessor Hipparchus, and Ptolemy credited him for some of the theoretical work

Ir a página "itinerarios"