My Science School

I am overweight and I don't feel happy about it. It has made me feel very conscious. I feel that people around me do not treat me well because of this.

If you are overweight, it would be right to lose the excess weight for your own physical well-being. How we look often influences the way we feel. Not being in the right shape can make you feel conscious sometimes. It is often good to practise self-love, which means that irrespective of your physical appearance you love and appreciate yourself for who you are. Each one of us is made differently, however, finding love in your own uniqueness is essential.

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If we talk about ringed planets, more often than not every one of us will be talking about Saturn. This, despite the fact that all four giants in our solar system Jupiter, Saturn, Uranus, and Neptune - in fact have rings.

This is likely because Saturn has spectacular rings. While the rings of Jupiter and Neptune are flimsy and difficult to view with stargazing instruments traditionally used, the rings of Uranus aren't as large as that of Saturn's.

As Jupiter is bigger than Saturn, it ought to have rings that are larger and more spectacular than that of its neighbour. As this isn't the case, scientists from UC Riverside decided to investigate it further. Their results were accepted by the Planetary Science journal and are available online.

Dynamic simulation

A dynamic computer simulation was run to try and understand the reason why Jupiter's rings look the way they do. The simulation accounted for Jupiter's orbit, the orbits of Jupiter's four main moons, and information regarding the time it takes for rings to form.

The rings of Saturn are largely made of ice, some of which may have come from comets also largely made of ice. When moons are massive, their gravity can either clear the ice out of the planet's orbit, or change the ice's orbit such that it collides with the moons.

Massive moons

The Galilean moons of Jupiter Ganymede, Callisto, lo, and Europa- are all large moons. Ganymede, in fact, is the largest moon in our solar system. The four main massive moons of Jupiter would thus destroy any large rings that might form around the planet. This also means that Jupiter is unlikely to have had large. spectacular rings at any time in the past as well.

Ring systems, apart from being beautiful, help us understand the history of a planet. They offer evidence of collisions with moons or comets, indicating the type of event that might have led to their formation. The researchers next plan to use the simulations to study the rings of Uranus to find out what the lifetime of those rings might be.

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Dr BR Ambedkar is one of the most luminous figures of modern Indian history and the principal architect of our constitution. He endeavoured to build a new social order based on the democratic ideals of liberty, equality and fraternity. Let us look back at one of his most iconic speeches at the Constituent Assembly.

On November 24, 1949, B. R. Ambedkar presented his concluding remarks on the adoption of the Constitution in the Constituent Assembly. His address recalled the detailed discussions and deliberations on fundamental rights, union powers, and upliftment of minorities that laid the foundation of our Constitution's legal framework. But what makes this speech significant in present-day's political environment is its orators prophetic predictions of the factors that threaten India's political identity as a socialist democracy.

The quest of the hour Even at the helm of liberty, what crippled Ambedkars mind with anxiety was the thought of the stronghold ideals of caste and creed had on the average citizen. Recalling past incidents like the invasion of Sind by Mahommed-Bin-Kasim, he elaborated on how India had once before lost its independence to the treachery of its people and the rise of new political parties that possess diverse and opposing political standing can cause history to repeat itself.

He declared that the day politicians choose creed over the country, the purpose of democracy will be defeated.

Therefore, the quest of the hour was to ensure that proper measures are taken to enforce and safeguard equality, liberty and fraternity as a nascent nation moved forward

Abandon the grammar of anarchy

In his address to the constituent assembly, Ambedkar implored to hold fast to constitutional methods of achieving social and economic objectives and abandon methods of rebellion like civil disobedience, non-cooperation and satyagraha. According to him, in a society that is built on good well and justice and is governed by leaders elected by the people there is no valid justification to employ unsanctioned methods of rebellion.

Dangers of hero-worship Calling Bhakti culture or Hero-worship a sure road to degradation and eventual dictatorship, he said "There is nothing wrong in being grateful to great men who have rendered lifelong services to the country. But there are limits to gratefulness... With independence, we have lost the excuse of blaming the British for anything going wrong. If hereafter things go wrong, we will have nobody to blame. Except ourselves...If we wish to preserve the Constitution...let us resolve not to be tardy in the recognition of the evils that lie across our path...nor to be weak in our initiative to remove them. That is the only way to serve the country. I know of no better." (excerpt from the speech)

Key takeaways from the speech

1. Equality, liberty and fraternity are the foundations of our constitution.

2. Blind faith in any entity or individual is an enemy of the truth.

3. A good citizen understands the responsibility that comes with freedom.

DID YOU KNOW?

1. Dr Ambedkar was the first law minister of Independent India
2. Ambedkar's 20-page autobiography titled "Waiting for a Visa" is part of Columbia University's curriculum.
3. Ambedkar was the first member of the backward classes to become a lawyer.
4. Ambedkar was the first and only Satyagrahi to conduct "Satyagraha for drinking water”. Ambedkar had master's degrees in around 64 subjects and was the first Indian to obtain a doctorate in Economics from a foreign university.

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Scientists have achieved yet another historic feat by discovering a dormant black hole. It is for the first time that a dormant stellar-mass black hole orbiting a star has been detected in a nearby galaxy.

This new black hole is nine times the mass of the Sun and revolves around a blue star in the nearby Large Magellanic Cloud galaxy. Researchers have termed it "the first to be unambiguously detected outside our galaxy". The binary system has been christened VFTS243. This finding is cardinal because it will help us get more insights into what happens during the death of a star and how black hole pairs are formed.

Astrophysicist and the lead author of the new study Tomer Shenar remarked that they have found a 'needle in a haystack. The study was published in the Nature Astronomy journal.

How it was detected

In a binary system, two stars revolve around each other and when a star dies, it will lead to a black hole in orbit with the other companion star. Scientists detect black holes from the X-ray radiation they emit as they feed on the companion star.

In this case, the scientists found a massive star orbiting something that couldn't be observed.

Following further studies, scientists found out that it was a dormant black hole.

The stellar mass black holes are formed when a massive star dies and collapses in a supernovae explosion. But strangely, in this particular case, the star that led to the formation of the black hole in VFTS 243 went away without any explosion and literally vanished into a black hole. Scientists have termed it a direct-collapse scenario. This has led scientists to understand that all stars do not end their lives in supernova explosions and it gives insight into how black hole pairs are formed.

What is a Black Hole?

A black hole is a celestial body that has an immensely huge gravitational pull, so huge that nothing escapes it. Not even light can escape it! The black hole grows by accumulating matter that falls in it. An image of a black hole was captured for the first time in 2019.

What is the size of a Black Hole?

The tiniest black hole can be as tiny as an atom but it can have the mass of a huge mountain. The other is the stellar black hole and these can have a mass of more than 20 solar masses, which is 20 times more mass than our sun. And the biggest black holes are christened supermassive. Sagittarius A is a supermassive black hole.

How are Black Holes formed?

Black holes are formed at the end of the life of a big star. When a massive star, say one having more than 20 solar masses, collapses after its nuclear fuel depletes, it will collapse onto itself and become a black hole. This collapse leads to a supernova and a part of the star gets blown off into space.

So will our Sun turn into a Black Hole?

The Sun cannot turn into a black hole. For us, the Sun is big, but on a celestial scale, it is too small to collapse into a black hole! So, our Sun will only turn into a white dwarf.

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Frotiere is the first exascale supercomputer. This means that it is a computing system capable of at least one exaflop or a billion- billion calculations per second (1018)

We were heralded into a new era of computational capability in May 2022 as the U.S. retook the top spot in the race to build the world's fastest supercomputer. Capable of billion billion operations per second, Frontier is the first exascale supercomputer. This means that it is a computing system capable of at least one exaflop or a billion billion calculations per second (1018).

Different level

The fastest supercomputers that were in existence before the Frontier came into being are still in the petascale, capable of quadrillion (1015) calculations per second. By reaching quintillion (1018) operations per second, Frontier has taken computing to a whole new level.

Built by the U.S. Department of Energy's Oak Ridge National Laboratory (ORNL) in Tennessee, the Frontier was able to demonstrate a processor speed of 1.102 exaflops in a benchmarking test called the High-Performance Linpack (HPL).

Faster than the fastest

Frontier took the place of being the world's fastest supercomputer from Japanese supercomputer Fugaku. Fugaku had held the position for two years having scored 415.5 petaflops in the HPL benchmark. At that time, it was thrice as fast as the machine it had ousted - the Summit supercomputer built by IBM, also housed at ORNL.

The progress in this field has been rapid in the last few years as computer scientists worldwide had been working towards surmounting the exascale barrier. The exascale milestone represents a new level of computational power capable of calculating solutions to highly complex problems. Be it climate systems, new kinds of materials and medicines, or even some of the deepest questions of humankind, exascale devices such as the Frontier can efficiently process vast amounts of data.

This incredible machine, which was built at a cost of $600 million, is undoubtedly the most advanced computer currently on Earth. The unmatched capabilities of Frontier as a tool for scientific discovery will surely unlock new frontiers of knowledge.

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First mentioned nearly 700 years ago, Dogri is one of the oldest modern languages of India. It is recognised as the ethnic language of the Dogras (an Indo-Aryan ethnolinguistic community that inhabited parts of India and Pakistan). The earliest mention of Dogras can be traced back to the 11th Century A.D Chamba copperplates.

The origin of Dogri Dogri literature began as an oral or folk tradition. Like any kind of folk literature, its diverse themed narratives dealt with mythology, parables, humour, and domestic issues. The first written poem in the language was composed by Devi Ditta (commonly called Dattu) in 1770.

The golden age of Dorgi literature coincides with the reign of Maharaja Ranjit Dev (1733-82). Remembered as one of the most influential rulers of Jammu, his reign was  characterised by a period of affluence and tremendous socio-economic progress in the region. However, the Devanagari script replaced Dogri at the advent of the 20th century.

History of Dogri Literature published by the Sahitya Akademi, elaborates upon how the apathy of the elite and the educated class of Dogras towards their mother tongue is to a great extent responsible for the disappearance of the language from the literary circles and the loss of the original Dorgri manuscripts that might have existed.

Although it is an officially recognised language of India added to the Eighth Schedule of the constitution it is still chiefly spoken only in the union territory of Jammu and Kashmir, along with certain parts of Himachal Pradesh, Punjab and northeastern Pakistan.

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