Eared shovel. Drawing, description

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Eared shovel. Tips for the home master

Builder, home master

In winter, in city courtyards and summer cottages, home-made wide shovels made of metal sheet are often used to clean paths from freshly fallen snow: they are easy and convenient to work with due to the large capture of a loose snow layer.

However, if you rake a lot at once, the sheet bends, and the snow from it refers to the edges. This will not happen - it is only necessary to slightly bend the side edges of the sheet.

Here two "hares" are "killed" at once: the snow stops falling, and the sheet acquires the necessary rigidity.

eared shovel

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The dream of interstellar travel, which has lived in the hearts of many generations, remains elusive for now due to numerous technical obstacles. However, an international group of scientists believes there is a way around these obstacles. Their idea is to use a powerful laser to send a swarm of thousands of microprobes, each weighing only a few grams, to Proxima Centauri. These probes form a giant lens with a diameter of 100 thousand kilometers and maintain optical communication during their journey. However, this ambitious idea will require an investment of $100 billion and 100 gigawatts of electricity to operate a powerful laser.

At the moment, in the field of space research, there are two main projects to create spacecraft capable of reaching relativistic speeds and reaching nearby stars within several decades. One of them is the Breakthrough Starshot project (a journey to Alpha Centauri), and the second is Project Lyra, the purpose of which is to intercept and study the mysterious object 'Oumuamua. In addition to the main tasks, these projects also include the creation of an interstellar communication network.

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It is proposed to launch hundreds of probes in stages over the course of a year until the number reaches a thousand. Communication will be supported by a 100 GW laser synchronized with the probes' clocks. The formation of probes will be ensured by modulating the launch speed of the first and last devices. And although some of them may fail, most of them will still be able to achieve the goal.

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