💥UPSC 2026, 2027, 2028 UAP Mentorship (March Batch) + Access XFactor Notes & Microthemes PDF
Talk to mentor

Civilsdaily

Login

Type: Prelims Only

  • International Space Agencies – Missions and Discoveries

    Moon-forming region seen around an exoplanet for the first time

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Exoplanets

    Mains level: Core accretion

     

    Scientists for the first time have spotted a Moon-forming region around an exo-planet beyond our solar system.

    What are Exoplanets?

    • More than 4,400 planets have been discovered outside our solar system, called exoplanets.
    • Most orbit other stars, but free-floating exoplanets, called rogue planets, orbit the galactic center and are untethered to any star.
    • No circumplanetary discs had been found until now because all the known exoplanets resided in “mature” – fully developed – solar systems, except the two infant gas planets orbiting PDS 70.

    What is the new finding?

    • The researchers have detected a disc of swirling material accumulating around one of two newborn planets.
    • They were seen orbiting a young star called PDS 70, located a relatively close 370 light-years from Earth.
    • It is called a circumplanetary disc, and it is from these those moons are born.
    • The discovery offers a deeper understanding of the formation of planets and moons.

    Focus of the finding: Formation of disc

    • In our solar system, the impressive rings of Saturn, a planet around which more than 80 moons orbit, represent a relic of a primordial moon-forming disc.
    • The orange-colored star PDS 70, roughly the same mass as our Sun, is about 5 million years old– a blink of the eye in cosmic time.
    • The two planets are even younger. Both planets are similar (although larger) to Jupiter, a gas giant.
    • It was around one of the two planets, called PDS 70c, that a Moon-forming disc was observed.

    Observing birth of a moon: Core Accretion

    • Stars burst to life within clouds of interstellar gas and dust scattered throughout galaxies.
    • Leftover material spinning around a new star then coalesces into planets, and circumplanetary discs surrounding some planets similarly yield moons.
    • The dominant mechanism thought to underpin planet formation is called “core accretion”.
    • In this scenario, small dust grains, coated in ice, gradually grow to larger and larger sizes through successive collisions with other grains.
    • This continues until the grains have grown to a size of a planetary core, at which point the young planet has a strong enough gravitational potential to accrete gas which will form its atmosphere.
    • Some nascent planets attract a disc of material around them, with the same process that gives rise to planets around a star leading to the formation of moons around planets.
    • The disc around PDS 70c, with a diameter about equal to the distance of the Earth to the sun, possesses enough mass to produce up to three moons the size of Earth’s moon.

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • Water Management – Institutional Reforms, Conservation Efforts, etc.

    Microplastics Pollution in Ganga

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Microplastic pollution

    Mains level: Water Pollution

     

    The Ganga is heavily polluted with microplastics at Varanasi, Haridwar, and Kanpur, Delhi-based non-profit Toxics Link claimed.

    What are Microplastics?

    • Microplastics are plastics that are less than 5 mm in size but are a major source of marine pollution.
    • Untreated sewage from many cities along the river’s course, industrial waste, and religious offerings wrapped in non-degradable plastics pile pollutants into the river as it flows through several densely populated cities.
    • The plastic products and waste materials released or dumped in the river break down and are eventually broken down into microparticles.
    • The rivers finally transport significantly large quantities downstream into the ocean, which is the ultimate sink of all plastics being used by humans.

    Microplastics in Ganga

    • They are non-degradable plastics that often entered the Ganga through industrial waste or packaging of religious offerings, its research found.
    • The density of population in the three cities also added to the problem because a large chunk of pollutants got directly discharged into the river by people living on the banks.
    • Among the three cities, the Toxics Link’s study found that sites at Varanasi showed the maximum load of microplastics in the water of the Ganga, as compared to the other two cities.
    • This might be due to cumulative downstream pollution as well as industrial and human activities.

    On a global high

    • The researchers tried to compare the microplastics concentration in Ganga water with similar studies on other rivers across the globe.
    • It included the Rhine in Europe, the Patapsco, Magothy, Rhode in North America, and the Elqui, Maipo, Biobio, and Maule in South America.
    • They found the Ganga microplastics pollution was much higher.
    • This was in spite of a higher per capita consumption of plastic in the European countries, North and South America, as compared to India.

    How does it impact people?

    • The Ganga is a source of water for not just drinking and bathing purposes but also for irrigation to a large extent.
    • Microplastics in river water, if ingested in humans or other organisms, can cause toxicity through various means.
    • Not only are these microplastics toxic themselves, they also have a tendency to absorb various toxins present in water, including harmful chemicals.
    • Although some of the effects of microplastics on public health are understood, a lot still needs to be done.

    Answer this PYQ in the comment box:

    Q. Why is there a great concern about the ‘microbeads’ that are released into the environment? (CSP 2019)

    (a) They are considered harmful to marine ecosystems.

    (b) They are considered to cause skin cancer in children.

    (c) They are small enough to be absorbed by crop plants in irrigated fields.

    (d) They are often found to be used as food adulterants.

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • Festivals, Dances, Theatre, Literature, Art in News

    Festival in news: Harela Festival

    Prelims Only | History | Mains Paper 1: Arts & Culture

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Harela Festival

    Mains level: Paper 1- Festivals in India

    Villagers across Uttarakhand celebrated Harela, a festival of greenery, peace, prosperity and environmental conservation.

    Harela Festival

    • Harela means ‘day of green’ and is celebrated in the month of Shravan (the fifth month of the Hindu lunar calendar) to worship Lord Shiva and Goddess Parvati.
    • People across Uttarakhand, especially the Kumaun region, associate greenery with prosperity.
    • The seeds of five to seven types of crops —  maize, til (sesame), urad (black gram), mustard, oats —  are sown in donas (bowl made of leaves) or ringalare (hill bamboo baskets) nine days before the festival.
    • They are harvested on the ninth day and distributed to neighbours, friends and relatives.
    • The flourish of the crops symbolizes prosperity in the year ahead.
    • People make clay statues of Lord Shiva and Goddess Parvati, known as Dikare, and worship them a day before the festival.
    • Harela is also linked to the Barahnaza system (12 types of crops), a crop diversification technique followed in the region.

    Answer this PYQ in the comment box:

    Q.Consider the following pairs:
    Tradition: State
    1. Chapchar Kut: festival Mizoram
    2. Khongjom Parba ballad: Manipur
    3. Thang Ta dance: Sikkim
    Which of the pairs given above is/are correct?

    (a) 1 only
    (b) 1 and 2
    (c) 3 only
    (d) 2 and 3

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • Zoonotic Diseases: Medical Sciences Involved & Preventive Measures

    What is Monkey B virus?

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Monkey B Virus

    Mains level: Zoonotic Diseases

    China has reported the first human death case with the Monkey B virus (BV).

    What is Monkey B virus?

    • The virus, initially isolated in 1932, is an alphaherpesvirus enzootic in macaques of the genus Macaca.
    • B virus is the only identified old-world-monkey herpes virus that displays severe pathogenicity in humans.

    Answer this question from our AWE initiative:

    There is been an increase in occurance of zoonotic human infectious diseases are zoonotic . Give reasons for this. Also suggest ways to contain and decrease the frequency of such events.(250 Words)

    How is it transmitted?

    • The infection can be transmitted via direct contact and exchange of bodily secretions of monkeys and has a fatality rate of 70 per cent to 80 per cent.
    • According to the Centre for Disease Control and Prevention, Macaque monkeys commonly have this virus, and it can be found in their saliva, feces, urine, or brain or spinal cord tissue.
    • The virus may also be found in cells coming from an infected monkey in a lab. B virus can survive for hours on surfaces, particularly when moist.

    When can a human get infected with B virus?

    • Humans can get infected if they are bitten or scratched by an infected monkey.

    Symptoms

    • Symptoms typically start within one month of being exposed to B virus but could appear in as little as three to seven days.
    • The first indications of B virus infection are typically flu-like symptoms such as fever and chills, muscle ache, fatigue and headache.
    • Following this, a person may develop small blisters in the wound or area on the body that came in contact with the monkey.
    • Some other symptoms of the infection include shortness of breath, nausea and vomiting, abdominal pain and hiccups.
    • As the disease progresses, the virus spreads to and causes inflammation (swelling) of the brain and spinal cord, leading to neurologic and inflammatory symptoms.

    Is there a vaccine against B virus?

    • Currently, there are no vaccines that can protect against B virus infection.

    Who are at higher risk for infection?

    • The virus might pose a potential threat to laboratory workers, veterinarians, and others who may be exposed to monkeys or their specimens.
    • To date, only one case has been documented of an infected person spreading the B virus to another person.

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • International Space Agencies – Missions and Discoveries

    Near-Earth Asteroid Scout Mission

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Near-Earth Asteroid Scout

    Mains level: Study of asteroids

    Last week, NASA announced that its new spacecraft, named NEA Scout, has completed all required tests and has been safely tucked inside the Space Launch System (SLS) rocket.

    For landing on Moon

    • NEA Scout is one of several payloads that will hitch a ride on Artemis I, which is expected to be launched in November.
    • Artemis I will be an uncrewed test-flight of the Orion spacecraft and SLS rocket.
    • Under the Artemis programme, NASA has aimed to land the first woman on the Moon in 2024 and also establish sustainable lunar exploration programs by 2030.

    What is NEA Scout?

    • Near-Earth Asteroid Scout, or NEA Scout, is a small spacecraft, about the size of a big shoebox. Its main mission is to fly by and collect data from a near-Earth asteroid.
    • It will also be America’s first interplanetary mission using special solar sail propulsion.
    • This type of propulsion is especially useful for small, lightweight spacecraft that cannot carry large amounts of conventional rocket propellant.
    • NEA Scout will use stainless steel alloy booms and deploy an aluminium-coated sail measuring 925 square feet.
    • The large-area sail will generate thrust by reflecting sunlight.
    • Energetic particles of sunlight bounce off the solar sail to give it a gentle, yet constant push.

    How will it study the asteroid?

    • NEA Scout is equipped with special cameras and can take pictures ranging from 50 cm/pixels to 10 cm/pixels.
    • It can also process the image and reduce the file sizes before sending them to the earth-based Deep Space Network via its medium-gain antenna.
    • The spacecraft will take about two years to cruise to the asteroid and will be about 93 million miles away from Earth during the asteroid encounter.

    Why should we study near-Earth asteroids?

    • Despite their size, some of these small asteroids could pose a threat to Earth.
    • Understanding their properties could help us develop strategies for reducing the potential damage caused in the event of an impact.
    • Scientists will use this data to determine what is required to reduce risk, increase effectiveness, and improve the design and operations of robotic and human space exploration.

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • International Space Agencies – Missions and Discoveries

    Why does Mercury have such a big iron core?

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Our planetary system

    Mains level: Not Much

    Researchers have developed a model showing that the density, mass and iron content of a Mercury’s core is influenced by its distance from the Sun’s magnetic field.

    About Mercury

    • Mercury is the first and the smallest planet in our solar system.
    • It is also the closest planet to Earth.
    • Like the other three terrestrial planets, Mercury contains a core surrounded by a mantle and a crust.
    • But unlike any other planet, Mercury’s core makes up a larger portion of the planet.
    • MESSENGER was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury’s chemical composition, geology, and magnetic field.
    • It was the analysis from the MESSENGER mission that tells: Mercury’s core is solid.

    Mystery over the core

    • It has long been known that Mercury’s core composition is made of liquid metal.
    • The core itself is about 3,600 km across. Surrounding that is a 600 km thick mantle.
    • And around that is the crust, which is believed to be 100-200 km thick.
    • The crust is known to have narrow ridges that extend for hundreds of kilometres.
    • This large core has long been one of the most intriguing mysteries about Mercury.

    Why does Mercury have a large core?

    • A new study reveals that the sun’s magnetism is the reason.
    • The sun’s magnetic field influences the density, mass, and iron content of Mercury’s core.
    • The four inner planets of our solar system—Mercury, Venus, Earth, and Mars—are made up of different proportions of metal and rock.
    • A gradient in which the metal content in the core drops off as the planets get farther from the sun.
    • The researchers explain how this happened by showing that the sun’s magnetic field controlled the distribution of raw materials in the early forming solar system.

    What are the key propositions?

    • During the early formation of the solar system, when a swirling dust storm and gas encircled the sun, iron’s grain was drawn toward the centre by the sun’s magnetic field.
    • At the time of planet formation from clumps of that dust and gas, planets nearer to the sun consolidated more iron into their centres than those farther away.
    • Scientists also found that the density and proportion of iron in the planet’s core correlate with the strength of the magnetic field around the sun during planetary formation.
    • Existing models on planetary formation were used to determine the speed at which gas and dust were pulled into the centre of our solar system during its formation.
    • The magnetic field that the sun would have generated as it burst into being and calculated how that magnetic field would draw iron through the dust and gas cloud.

    Cooling led solidification

    • As the early solar system began to cool, dust and gas that were not drawn into the sun started to clump together.
    • The clumps closer to the sun would have been exposed to a stronger magnetic field and thus would contain more iron than those farther away from the sun.
    • As the clumps coalesced and cooled into spinning planets, gravitational forces drew the iron into their core.

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • Global Geological And Climatic Events

    How the Moon ‘Wobble’ affects rising tides

    Prelims Only | Enviro & Biodiversity | Mains Paper 1: Geographical Features & Their Location

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Moon wobble

    Mains level: Moon wobble and climate change

    US coastlines will face increasing flooding in the mid-2030s due to a regular lunar cycle called the wobble effect that will magnify rising sea levels caused by climate change.

    What is the Moon Wobble?

    • The moon wobble is nothing but a regular swaying in the moon’s orbit.
    • It was first documented way back in 1728.
    • This wobble takes over an 18.6-year period to complete and continues in a cyclic fashion.

    How does this wobble occur?

    • High tides on this planet are caused mostly by the pull of the moon’s gravity on a spinning Earth. On most beaches, you would see two high tides every 24 hours.
    • The moon also revolves around the Earth about once a month, and that orbit is a little bit tilted.
    • moon’s orbital plane around the Earth is at an approximate 5-degree incline to the Earth’s orbital plane around the sun.
    • Because of that, the path of the moon’s orbit seems to fluctuate over time, completing a full cycle — sometimes referred to as a nodal cycle — every 18.6 years.
    • At certain points along the cycle, the moon’s gravitational pull comes from such an angle that it yanks one of the day’s two high tides a little bit higher, at the expense of the other.
    • This does not mean that the moon itself is wobbling, nor that its gravity is necessarily pulling at our oceans any more or less than usual.

    What impact does this wobble have on Earth?

    • Influences the ebb and flow of tides: The moon wobbles impacts the gravitational pull of the moon, and therefore, indirectly influences the ebb and flow of tides here on the Earth.
    • One half of the 18.6-year cycle suppresses the tides, which means that the high tides get lower, while the low tides get higher than normal.
    • Once this cycle completes, the situation flips—in the subsequent cycle, the tides are amplified, with high tides getting higher and low tides, lower.
    • The lunar cycle is expected to shift again by mid-2030, and in the coming phase, the tides will amplify once again.

    Moon wobble and climate change

    • The upcoming changes in the lunar cycle will pose a serious threat, as the amplified high tides coupled with the rising sea levels will make the risk of flooding far greater across all coastal regions of the globe.
    • The study predicts that the high tide-associated floods—also known as nuisance floods or sunny day floods—may occur in clusters that could last for months or even for longer periods!
    • This surge will be closely associated with the position of the Moon, Earth and the Sun.
    • When the Moon and Earth line up in specific ways with each other and the Sun, the resulting gravitational pull and the ocean’s corresponding response may leave city-dwellers coping with floods every day or two.

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • Cyber Security – CERTs, Policy, etc

    Back in news: Pegasus Spyware

    Prelims Only | Security Issues | Mains Paper 3: Cyber Security

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Pegasus

    Mains level: Whatsapp snooping

    Telephone numbers of some noted Indian journalists were successfully snooped upon by an unidentified agency using Pegasus software.

    Pegasus Spyware

    • All spyware do what the name suggests — they spy on people through their phones.
    • Pegasus works by sending an exploit link, and if the target user clicks on the link, the malware or the code that allows the surveillance is installed on the user’s phone.
    • A presumably newer version of the malware does not even require a target user to click a link.
    • Once Pegasus is installed, the attacker has complete access to the target user’s phone.
    • The first reports on Pegasus’s spyware operations emerged in 2016, when Ahmed Mansoor, a human rights activist in the UAE, was targeted with an SMS link on his iPhone 6.

    What is the new threat?

    • Pegasus has evolved from its earlier spear-phishing methods using text links or messages to ‘zero-click’ attacks which do not require any action from the phone’s user.
    • This had made what was without a doubt the most powerful spyware out there, more potent and almost impossible to detect or stop.

    How do zero-click attacks work?

    • A zero-click attack helps spyware like Pegasus gain control over a device without human interaction or human error.
    • Zero-click attacks are hard to detect given their nature and hence even harder to prevent.
    • Detection becomes even harder in encrypted environments where there is no visibility on the data packets being sent or received.
    • Most of these attacks exploit software that receive data even before it can determine whether what is coming in is trustworthy or not, like an email client.

    Answer this PYQ from CSP 2018:

    Q.The terms ‘WannaCry, Petya, Eternal Blue’ sometimes mentioned news recently are related to

    (a) Exoplanets

    (b) Crypto currency

    (c) Cyber attacks

    (d) Mini satellites

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • Modern Indian History-Events and Personalities

    When were Tilak and Gandhi tried under the Sedition Law?

    Prelims Only | | Mains Paper 1: Modern Indian History

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Sedition in colonial times

    Mains level: Not Much

    Recently, Chief Justice of India N V Ramana observed that the “colonial law” was used by the British to silence Mahatma Gandhi and Bal Gangadhar Tilak.

    Must read:

    Sedition Law and its discontents

    Use of sedition law through history

    • According to the LOC blog, the first known instance of the application of the law was the trial of newspaper editor Jogendra Chandra Bose in 1891.
    • Other prominent examples of the application of the law include the trials of Tilak and Gandhi.
    • Apart from this, Jawaharlal Nehru, Abul Kalam Azad and Vinayak Damodar Savarkar were also charged with sedition.

    When was sedition law used against Gandhi and Tilak?

    • In 1922, Gandhi was arrested on charges of sedition in Bombay for taking part in protests against the colonial government.
    • He was sentenced to six years in prison but was released after two years because of medical reasons.
    • Before Gandhi, Tilak faced three trials in cases related to sedition and was imprisoned twice.
    • He was charged with sedition in 1897 for writing an article in his weekly publication called Kesari and was sentenced to 12 months imprisonment.
    • He has tried again in 1908 and was represented by MA Jinnah. But his application for bail was rejected and he was sentenced to six years.
    • The second time he was tried was also because of his writings, one of which referred to the murder of European women in Muzzafarpur when bombs were thrown by Bengali revolutionaries.
    • Interestingly, the judge who announced Tilak’s sentence in the second trial, Justice DD Davar, had represented him in his first trial in 1897.

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now

  • Climate Change Impact on India and World – International Reports, Key Observations, etc.

    Why the Amazon forests are no longer acting as a carbon sink

    Prelims Only | Enviro & Biodiversity | Mains Paper 1: Important Geophysical Phenomena

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Amazon forests

    Mains level: Climate Change

    The Amazon forests in South America, which are the largest tropical forests in the world, have started emitting carbon dioxide (CO2) instead of absorbing carbon emissions.

    Note the countries bordered by the Amazon forests.

    Amazon forests

    • The Amazon rainforest is a moist broadleaf tropical rainforest in the Amazon biome that covers most of the Amazon basin of South America.
    • This basin encompasses 7,000,000 sq km of which 5,500,000 sq km are covered by the rainforest.
    • The majority of the forest is contained within Brazil, with 60% of the rainforest, followed by Peru with 13%, Colombia with 10%, and with minor amounts in Bolivia, Ecuador, French Guiana, Guyana, Suriname, and Venezuela.
    • It represents over half of the planet’s remaining rainforests and comprises the largest and most biodiverse tract of tropical rainforest in the world.

    Why in news?

    • A significant amount of deforestation in eastern and southeastern Brazil has turned the forest into a source of CO2 that has the ability to warm the planet.
    • Not only the Amazon rainforests, some forests in Southeast Asia have also turned into carbon sources in the last few years as a result of the formation of plantations and fires.

    What have the researchers found?

    • Over the years as fossil-fuel emissions across the world have increased, the Amazon forests have absorbed CO2 from the atmosphere, helping to moderate the global climate.
    • But researchers are not saying that because of significant levels of deforestation (over the course of 40 years) there has been a long-term decrease in rainfall and increase in temperatures during the dry season.
    • Because of these reasons the eastern Amazon forests are no longer carbon sinks, whereas the more intact and wetter forests in the central and western parts are neither carbon sinks nor are they emitters.
    • Another reason for the eastern region not being able to absorb as much CO2 as it did previously is the conversion of forests into agricultural land.

    Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024

    Attend Now