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The mystery of the appearance of the solar system is revealedScientists at the University of California Lawrence Livermo...
16/11/2020

The mystery of the appearance of the solar system is revealed
Scientists at the University of California Lawrence Livermore National Laboratory have uncovered the mystery of the time of the solar system's appearance, which happened approximately 4.5 billion years ago. It turned out that the formation of the Sun and protoplanets took only 200 thousand years. This is reported in an article published in the journal Science.
The solar system arose as a result of the gravitational collapse of a large cloud of dust, the substance of which consists of most of the celestial bodies in it, including the sun and planets. Astronomers have previously observed other planetary systems and concluded that it takes 1-2 million years for a cloud to collapse and transform into a parent star and planets. However, in the course of a new study, it turned out that the solar system emerged very quickly.
Researchers have determined the content of molybdenum isotopes in calcium and aluminum-rich inclusions (CAIs), which are believed to be the oldest dated structural elements of chondrite meteorites. Most CAIs formed 4.567 billion years ago, between 40,000 and 200,000 years ago, in a high-temperature environment near the young Sun. They were then transferred to the region where the meteorites formed. Since the formation time of CAI is shorter than the estimated time of formation of the solar system, it was not clear what phase the inclusions were in.
It turned out that in CAI there are variations in the isotopic composition of molybdenum, arising from the inhomogeneous distribution of matter in the protoplanetary disk. This means that the formation of the outer and inner regions of the solar system occurred during the period of inclusions, when the sun was transforming from a protostar into a main sequence star. Thus, all the substance of the cloud, from which a large part of the solar system arose, was attracted to the sun for 200 thousand years.

Negative growthIn 2020, the release of new iPhones is divided into two parts: the first are the iPhone 12 and 12 Pro, an...
28/10/2020

Negative growth
In 2020, the release of new iPhones is divided into two parts: the first are the iPhone 12 and 12 Pro, and a month later - on November 13 - the iPhone 12 mini and 12 Pro Max. It is difficult to assess how the pandemic and the economic downturn affected Apple specifically, but the bottom line is that the iPhone is now not only more powerful and better than its predecessors, but also more expensive. "Lenta.ru" talks about the first impressions of the iPhone 12 and 12 Pro.

Since 2017, Apple has begun a process of fragmentation of the iPhone lineup, trying to cover the requests of the maximum number of users. That year, the iPhone 8 and X were released, where the first acted as a kind of "people's flagship", and the second - a premium phone for an insane, as it seemed at that time, cost. The idea is simple: those who just need a fresh phone with all the basic functions will go for the iPhone 8, while fans of the brand will wait for the iPhone X and take it for any money.
The real effect of such changes only appeared in 2018, when Apple released the iPhone Xr and Xs. The affordable flagship was the most popular phone in the world until the iPhone 11, which took its place not only in the lineup but at the top of all sorts of charts and reports. Moreover, this is the only phone from the line that Apple continues to release and for the second year in a row reduces its price.

As a result, in the first half of 2020, Apple shipped 14.4 million iPhone 11 Pro and Pro Max (7.7 million for the Pro Max and 6.7 million for the regular Pro) and 37.7 million for the regular Pro. IPhone 11 Pro sales was the most lagging behind in the company's lineup, and the release of the iPhone 12 further crippled the position of the Pro version of the phone.

Judging by the testimony of archaeologists, wild-growing carrots were exactly purple in color. The fossilized seeds of t...
28/10/2020

Judging by the testimony of archaeologists, wild-growing carrots were exactly purple in color. The fossilized seeds of the plant were found in tombs, the time of "laying" of which was estimated as 5 thousand years BC, and in the Egyptian temple of Luxor, the carrots in the drawings were exactly purple

Tel Aviv is home to 46% of Israel's population. Apart from the leaders of the ranking: the monotown countries of Hong Ko...
27/10/2020

Tel Aviv is home to 46% of Israel's population. Apart from the leaders of the ranking: the monotown countries of Hong Kong, Macau and Singapore, this is one of the highest concentrations of the country's population in one city

The largest city in the world is Tokyo. Population 37.5 million.
27/10/2020

The largest city in the world is Tokyo. Population 37.5 million.

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