When was a solar eclipse first predicted? Detailed answer

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When was a solar eclipse first predicted? Detailed answer

Big encyclopedia for children and adults

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When was a solar eclipse first predicted?

In 585 BC. e. May 28 This was done by the Greek scientist, one of the founders of European science, Thales of Miletus (VI century BC).

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

Are lizards poisonous?

There are few animals in the world that would have such a frightening appearance as some lizards! And yet, of over 2500 lizard species, only two are truly venomous. This is a gila-tooth living in the deserts of America, and a beaded lizard from Mexico. Lizards are close relatives of snakes and, like snakes, they are reptiles with scaly skin.

However, unlike snakes, their long body can be divided into three parts: head, torso and tail. Most species have four legs. With such a variety of lizard species, we can naturally meet many exceptions. For example, some lizards do not have legs at all and are absolutely similar to snakes. They have a fair amount of strength, which helps them defend themselves from enemies. They can drop their tail! This often saves them when some enemy stops to grab them by the tail. Subsequently, the lizard grows a new tail!

Although most lizards are born from eggs, there are species that are born alive. Most lizards feed on insects, but some species feed on birds and small animals. Most often, lizards are found in the tropics, but in general they live all over the world, except for the Arctic. Wherever lizards live, they perfectly adapt to the environment. For example, those lizards that live in grass or trees are brightly colored, while those that live in the desert are dark gray or brown to blend in with the sand.

The chameleon, which also belongs to the lizards, can even change its color depending on the environment. Lizards have a wide variety of sizes. One of the Central American lizard species is no more than 8 centimeters in length.

There is another species called "lizard", and its representatives reach 2 meters in length. In India, there are lizards, which are called "dragons", the length of which can reach up to 3 meters. They are a truly awesome sight! These dragons can easily kill a fairly large animal with a single blow of the tail. Lizards love to bask in the sun. Therefore, those of them that live in places with a cool climate simply fall asleep for the winter, hiding somewhere from the cold.

Test your knowledge! Did you know...

▪ Why are whales considered mammals?

▪ Where do rhinoceroses live?

▪ How did the Cold War start?

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Random news from the Archive

Miniature PMICs MAX77650/1 from Maxim Integrated 23.11.2018

Maxim Integrated has released the new MAX77650 and MAX77651 PMIC (Power Management Integrated Circuit) multichannel power converters for portable and wearable electronics.

The main feature of this solution is the innovative SIMO (Single Input, Multiple Output) buck-boost topology, which, with only one inductor, provides 3 independent output channels, each of which is configured separately. In addition, the microcircuit has a built-in LDO regulator and can charge a lithium battery. With the help of a bidirectional I2C interface, it is possible to both configure the microcircuit and read the current status. The output current for each channel may vary within certain limits, but the total output current must not exceed a certain value.

This solution is suitable for applications in which the issue of free space on the printed circuit board is acute. The solution area occupied on the printed circuit board can be as low as 30 mm2.

Technical specifications:

input voltage range 2,7...5,5 V;
total output current 300 mA;
frequency-pulse modulation;
the lithium battery charge current is adjustable in the range of 7,5...300 mA;
end-of-charge voltage adjustable in the range of 3,6...4,6 V;
maximum current LDO-regulator 150 mA;
three special configurable current outputs for driving LEDs;
own consumption current 5,6 μA (when 3 channels + LDO controller are working);
the solution area on the board is not more than 30 mm2;
housing WLP-30.

Typical applications:

portable electronic devices;
internet of things (IoT);
fitness and medical bracelets.

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