Category: Science

The new method could help astronomers locate exoplanets using radio telescopes.
Prem Tripathi Updated: 18 August 2022 19:30 IST
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Scientists have found a new way to find the world of ‘aliens’, know about it
Scientists are searching for exoplanets in the hope that they will find signs of life there.

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Models based on Magnetohydrodynamics (MHD) help
However, the signals received from the new method will be quite faint.
A new generation radio telescope will be needed to catch them.
For the past few years, scientists have shifted their focus towards exoplanets. Planets that orbit stars other than the Sun are called exoplanets. Scientists are searching for exoplanets in the hope that they will find signs of life there.

Maybe an exoplanet also represents aliens. Most of the exoplanets have been discovered by transit method. In this, an optical telescope measures the brightness of a star over time. If the star’s brightness is very low, it could be a sign that a planet has passed in front of it. The transit method is a powerful tool, but it has some limitations. For this an optical telescope is needed and the planet should pass near the star.

Now a new method can also help astronomers detect exoplanets using radio telescopes.

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According to the report of sciencealert, it is not easy to observe exoplanets at radio wavelengths. Most planets do not emit much radio light and stars do. However, there can be differences in radio light due to flares emanating from the stars.

But large gas planets like Jupiter can be radio bright. This is because of their strong magnetic field. Jupiter’s radio light is so bright that you can identify it with the radio telescope at home.

Astronomers have detected radio signals from many other planets. During the study, the team tried to understand how such signals can happen. He based his model on magnetohydrodynamics (MHD). It describes how magnetic fields and ionized gases interact. The scientists applied their study to the planetary system identified as HD 189733. They simulated how a star’s wind interacted with the planet’s magnetic field.

Scientists came to know many interesting things. They discovered that radio observations could detect the transits of a planet passing in front of its star. However, such signals would be very faint and would require a new generation radio telescope to capture them. But if we do detect them,

the planetary radio signals will give us an accurate orbital measurement of at least one planet in the system. This will help in understanding the structure and interior of exoplanets.

agencies around the world have issued advisory
From Earth’s point of view, this seems a concern, but such behavior of the Sun is normal.
Prem Tripathi Updated on: 18 August 2022 20:18 IST
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The storm rising in the sun, may have an impact till the earth, agencies around the world have issued advisory
All this is the result of the 11-year solar cycle that the Sun is passing.

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Although it will not affect you at all
Our satellites in space may be affected
power grid may be affected
The danger of several solar storms is looming on the earth one after the other. All this is the result of the 11-year solar cycle that the Sun is passing. It is in very active phase and will be surrounded by movement till the year 2025. Recently, the US space agency NASA had said in a warning that there is a possibility of repeated giant solar eruptions.

Now the British Meteorological Office, the US National Oceanic and Atmospheric Administration (NOAA) Space Weather Prediction Center (SWPC) and the Australian Bureau of Meteorology (BOM) have issued advisories for solar and geomagnetic storms over the next few days. The reason for this is a sunspot formed on the Sun, which is repeatedly provoking solar flares and coronal mass ejections.

According to media reports, this seems to be a concern from the Earth’s perspective, but such behavior of the Sun is normal. These storms can cause some minor disturbances. However, they will not affect you at all.

Only our satellites in space can be affected. The power grid may be affected. If storms become more dangerous, they can put the passengers in space at risk. If you live in a high altitude, then you can get spectacular aurora views.

Solar storms are a natural part of the life of the Sun. Every 11 years when a new cycle begins, it goes through different activity levels. During this, the movements in the sun increase. Because of this, coronal mass ejections ie CME and solar flares are seen.

CMEs are large clouds of solar plasma. After a solar explosion, these clouds spread into the Sun’s magnetic field in space.

Due to their rotation in space, they expand and often they reach a distance of several lakh miles. Sometimes they collide with the magnetic field of the planets. When their direction is towards the Earth, they can cause geomagnetic disturbances.

Because of these, short circuits can occur in satellites and power grids can be affected. If their effect is high, they can also put the astronauts in Earth’s orbit at risk.

at Sri Lanka port 5 How big a threat to India? Missile-satellite tracking capability
The Chinese ship, which has been parked at Sri Lanka’s Hambantota Port since August 16, has become a big challenge for India.
Prem Tripathi Updated: 19 August 2022 12:32 IST
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Chinese ‘spy’ ship Yuan Wang standing at Sri Lanka port 5 How big a threat to India? Missile-satellite tracking capability
The reason for Indian concerns is the technology present in this ship, on the basis of which China can “spy” India.

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The reason for the concerns is the technology present in this ship.
It can track satellites of India
This ship can also monitor our launch site
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China has 4 such ships
Operation is a big concern
Can track satellites-misses
China’s technology and military capabilities are worrying the whole world. Relations between India and China are at a critical juncture with armies standing face to face on the border from Galwan to Arunachal in the north. The southern part of the country is generally considered safe.

The Indian Navy also dominates the sea here ie the Indian Ocean. But a Chinese ship standing at Sri Lanka’s Hambantota Port since August 16 has become a big challenge for India. Its name is ‘Yuan Wang-5’, which China is describing as its research and survey ship. The Indian government has expressed concern over the presence of this ship in the Indian Ocean.

At the same time, China is saying that it has deployed this ship to track its satellites. The reason for Indian concerns is the technology present in this ship, on the basis of which China can “spy” India. Let us know how big a challenge ‘Yuan Wang-5’ is for the country.

China has 4 such ships
According to reports, China has several ships of different categories. Most of these are equipped with hi-tech technologies. ‘Yuan Wang-5’ is more advanced than the rest. Since 1978, the ships of this series are serving in the Chinese Army.

‘Yuan Wang-5’ is the 5th ship of this series, which is of 25 thousand tons. Currently 4 ships of this series are with China. These include ‘Yuan Wang-3’, ‘Yuan Wang-5’, ‘Yuan Wang-6’ and ‘Yuan Wang-7’. ‘Yuan Wang-4’ was ruined in an accident many years ago.

Operation is a big concern

Even though China keeps saying that it is only tracking its satellites through ‘Yuan Wang-5’, but the matter does not end here. If China’s intention was clear, then the responsibility of operating this ship would have been of the Chinese Space Agency. but it’s not like that. This ship is operated by the Chinese Army.

Even on that, bringing the ship very close to India and putting it on the port of Sri Lanka is a big reason for trouble. China can spy on us by coming so close to India. Anyway, China has a bad track record in the matter of espionage. Such allegations have been made against many of his tech companies, apps. Many apps have also been blocked in the country.

Can track satellites-misses
With ‘Yuan Wang-5’ standing in Sri Lanka, China can track India’s satellites. The hi-tech radio antenna, radar and other instruments fitted in it can track any satellite. Coming very close to India, this ship can also monitor our launch site.

Most of the launch sites are in South India. This ‘spy’ ship can track missiles. Standing close to India, it can also keep an eye on our missiles. Its design is such that it works even in the worst of weather.

New research has shown that megalodon, a shark larger than a whale that roamed the ocean millions of years ago, could have eaten a whale-sized creature in just 5 bites.
Gadgets 360 Staff Updated: 19 August 2022 17:36 IST
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A shark as big as a school bus! A creature as big as a whale could eat in 5 bytes, know about it
Researchers have concluded this by making a 3D model of the megalodon.

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This information has come out from a new research
Once full, it could roam the sea for months
It would have weighed about 70 tons or as much as 10 elephants.
Shark is considered one of the most dangerous creatures of the sea. This huge fish can kill its prey in an instant. Now a new research has shown that megalodon, a shark bigger than the whale that roamed the ocean millions of years ago,

could eat a whale-sized creature in just 5 bites. When this giant shark had filled its stomach, then it could roam in the sea for months. Researchers have concluded this by making a 3D model of the megalodon. He also used fish fossils to make the model.

This study has been published in the journal Science Advances. According to this, the megalodon was about 50 feet (16 m) from nose to tail. Its size was bigger than a school bus.

It was about two to three times larger in size than the white sharks found today. Megalodon’s jaws were very large, due to which it could easily eat other creatures.

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Many more things have come to the fore in research about this huge fish. Turns out that Megalodon was a prolific swimmer. Its speed was faster than today’s sharks and it could easily migrate across many oceans. Study co-author John Hutchinson said it may have been a superpredator. There is no organism that matches its size.

Study author Catalina Pimiento said she used the fossils to create a 3D model of the shark. They also have a rear collection of shark vertebrae that have been in the Belgian Museum since the 1860s. Researchers estimate that the megalodon may have weighed about 70 tons, or as much as 10 elephants.

According to Pimiento, this giant shark could have opened its jaws to about 6 feet (2 meters). It is estimated that their existence ranged from 23 million to 2.6 million years. Megalodon fossils are extremely rare, so these types of 3D models are somewhat of a guesswork.

It can be estimated from the study that when the megalodon swims in the sea, then the rest of the creatures will not wander around it. Their presence is told in every sea of ​​the world, but there is no exact fact about how it ended. But more guesses are made only with regard to climate change.

Our ancestors chewed on seeds, hard peeled fruits and leaves. The result was that they expended more energy on food than modern humans.
Hemant Kumar Updated: 20 August 2022 13:33 IST
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Human development is related to the process of chewing food – study
Human development is related to the process of chewing

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Subjects’ energy expenditure increased by 10% while chewing soft gum
It took 15% more energy to chew hard gum
Consequences of the habit of chewing jaws, teeth etc. in modern man – Study
Chewing is considered to be of great importance in the process of eating and digesting food. Doctors or experts are often heard saying that food should be chewed. But do you know that this process of chewing is also related to the development of human beings?

Very interesting information has been given in a new study. It has been said that millions of years ago, the process of chewing became the reason for the development of man.

This study has been published in a journal called Science Advances. The study, prepared by scientists at Leyden University, was first published in the New York Times.

It has been written in the study that there is a masseter muscle or muscle in humans. Using its respirometry and electromyography, the scientists found that the chewing action by a human subject showed a measurable energy sink. It increases the metabolic rate by 10-15% from the base level.

Men and women aged 18 to 45 participated in the study. The subject chewed soft and hard chewing gum in it and the scientists took the results. The participants’ oxygen consumption, carbon dioxide production and masseter muscle activity were measured.

Paleoanthropologist Amanda Henry reported that while chewing soft gum, the subjects’ energy expenditure increased by 10.2%. The same consumption was recorded in hard gum at 15.1%. He said that chewing food consumes a lot of energy, the harder it is, the more energy it consumes.

Today’s food goes through many processes and is very soft to chew. But our ancestors chewed on seeds, hard peeled fruits and leaves. The result was that they expended more energy on food than modern humans.

Amanda said that we assume that natural selection made jaws, made facial muscles and teeth were also made from this so that the least energy is consumed in chewing food.

That’s why we think that the way we are chewing food today is because of millions of years of evolution. Scientists believe that this study will also help in understanding the process of taking shape of humans.