How far is the nearest star from us? Detailed answer

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How far is the nearest star from us? Detailed answer

Big encyclopedia for children and adults

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How far is the nearest star from us?

From the star Proxima in the constellation Centaurus, light flies to us for 4,22 years. True, you cannot see it with the naked eye, it is too weak. But next to it is the bright Alpha Centauri, which is 4,38 light years away.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

What does the word kangaroo mean in Aboriginal language?

No, it doesn't mean "I don't know" - whatever the countless websites and all sorts of "educational" books say, citing this case as "the most amusing example of cultural misunderstanding."

The real story is even more interesting. In the 700th century, there were at least 250 indigenous tribes in Australia, and they spoke XNUMX languages.

The word "kangaroo" (or "gangaroo") came to us from the language of the Guugu-Yimithirr tribe, who lived in the Botany Bay region, where it means a large gray or black kangaroo, Macropus robustus. As English settlers moved inland, they used the word to refer to any adult kangaroo or wallaby.

Another Aboriginal tribe - the Bagandi - lived 2250 km from Botany Bay and did not speak Guugo-Yimithirr. The natives heard a new word from the British and decided that it meant "an animal that no one had ever heard of before."

And since the Bagandis had never seen horses before, they (quite logically) used the word "kangaroo" to describe these "outlandish" creatures.

Test your knowledge! Did you know...

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Random news from the Archive

Septic tanks generate electricity from their contents 20.03.2016

A team of scientists from the University of Bath, Queen Mary University of London and the Bristol Robotics Lab have developed microbial fuel cells that generate energy from urine.

Microbial fuel cells work on the ability of some bacteria to process organic matter, thereby generating electricity. At the same time, room temperature and normal pressure are sufficient, which is unattainable with other methods of obtaining bioenergy. The researchers set themselves the goal of reducing the cost of standard devices of this type, as well as increasing their electricity generation.

Electrodes containing expensive materials such as platinum are commonly used to create microbial fuel cells. In their work, the scientists decided to use cheap carbon fiber and titanium wire. In order to speed up the reaction, the microbial element contained a catalyst made from glucose and egg white. Urine was used as an energy source.

The researchers tested the effectiveness of the device by changing the parameters of its individual elements. It turned out that increasing the length of the electrode from four to eight millimeters increases the output power tenfold.

According to Jon Chouler, one of the authors of the work, the new design is cheaper and more powerful than traditional microbial fuel cells.

Previously, a team of scientists from Princeton University and Florida Gulf Coast University used rotten tomatoes as an energy source for microbial fuel cells.

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