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

Type: Prelims Only

  • Indian Missile Program Updates

    Agnibaan: Pioneering with 3D-Printed Engines

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Agnibaan SOrTeD

    Mains level: Not Much

    agni

    Central Idea

    • Chennai-based Agnikul Cosmos takes a significant step as it moves its innovative rocket, Agni-1, to Sriharikota for integration assessments.
    • Successful integration checks could position Agnikul as the second Indian space-tech firm, following Skyroot Aerospace, to achieve suborbital space flight capability.

    Agnikul’s Remarkable Space Vehicle: Agnibaan

    • Agnibaan SOrTeD is a single-stage launch vehicle powered by Agnikul’s patented Agnilet semi-cryogenic engine.
    • In contrast to traditional sounding rockets, Agnibaan SOrTeD’s vertical take-off and precise trajectory enable orchestrated maneuvers during flight.

    (A) Distinct Features of Agnibaan

    • Customizability: The rocket offers custom launch configurations, either single or two-stage launches.
    • Impressive Dimensions: Standing at 18 meters and weighing 14,000 kg, Agnibaan SOrTeD is a powerful presence.
    • Payload Capacity: With a capacity for payloads of up to 100 kg, it can reach altitudes of 700 km in five different Lower Earth Orbits (LEOs).
    • Engine Configuration: The first stage can house up to seven Agnilet engines, powered by Liquid Oxygen and Kerosene, dependent on the mission’s requirements.
    • Versatile Launch: Designed for launch from over 10 different launch ports.
    • Launch Pedestal ‘Dhanush’: AgniKul’s built ‘Dhanush’ supports the rocket’s mobility across configurations, ensuring compatibility with multiple launch ports.
    • Cutting-Edge Agnilet Engine: The world’s sole single-piece 3D-printed engine powers the entire operation.

    (B) Innovative Agnilet Engine

    • Heart of the Vehicle: Agnilet engine, a 3D-printed, single-piece, 6 kN semi-cryogenic marvel, drives Agnibaan’s propulsion.
    • Propellant Composition: The engine employs a novel blend of liquid kerosene and supercold liquid oxygen as propellants, successfully tested at the Vikram Sarabhai Space Centre.
  • Modern Indian History-Events and Personalities

    Madan Lal Dhingra and his Contributions

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Madan Lal Dhingra

    Mains level: Not Much

    madanlal dhingra madan lal

    Central Idea

    • On the 114th anniversary of his execution, a memorial is being formally inaugurated in honour of Madan Lal Dhingra.

    Who was Madan Lal Dhingra?

    • Early Life: Born on September 18, 1883, in an affluent family in Amritsar, Dhingra’s father was a staunch British loyalist, working as a chief medical officer.
    • Shift towards Nationalism: Dhingra’s exposure to the nationalist movement in Lahore during his studies ignited his patriotism.
    • Socio-Economic Concerns: Driven by a sense of justice and concern for India’s impoverished masses, Dhingra’s patriotism extended to socio-economic issues.
    • Expulsion and Resilience: Expelled from college for protesting against the use of British-imported cloth, Dhingra’s defiance marked his commitment to the cause.

    Involvement in Revolutionary Circles

    • Contact with Leaders: Dhingra connected with prominent figures like Vinayak Damodar Savarkar and Shyamji Krishna Varma, active in London’s revolutionary circles.
    • India House: Dhingra frequented India House, a hub for revolutionary Indian nationalism founded by Shyamji Krishna Varma, further igniting his revolutionary spirit.
    • Abhinav Bharat Mandal: Dhingra joined Abhinav Bharat Mandal founded by Vinayak Savarkar, where he refined his plan to assassinate Curzon Wyllie.

    Assassination of Curzon Wyllie

    • Curzon Wyllie’s Profile: Curzon Wyllie was a British Indian officer and intelligence officer known for collecting information on revolutionaries.
    • The Assassination: On July 1, 1909, Dhingra attended an event where Curzon Wyllie was present. Dhingra fired five shots, fatally hitting both Curzon Wyllie and a doctor who tried to intervene.
    • Dhingra’s Justification: During his trial, Dhingra argued that if fighting Germans was patriotic for an Englishman, fighting the British was even more justifiable for him.

    Legacy and Memorial

    • Execution and Burial: Dhingra was found guilty, executed on August 17, 1909, and buried in London. His remains were brought to India in 1976.
    • Struggle for a Memorial: A memorial in Dhingra’s name has been a long-standing demand. The efforts culminated in the formal inauguration of the memorial on the 114th anniversary of his execution.
    • Memorial Inauguration: The memorial was inaugurated by Governor Banwari Lal Purohit on August 17, 2023, in Amritsar’s Golbagh area.
    • Memorial’s Significance: The memorial stands as a tribute to Dhingra’s sacrifice and his role in the fight for India’s freedom.
  • Indian Navy Updates

    INS Vindhyagiri and Project 17A

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: INS Vindhyagiri, Project 17A

    Mains level: Naval fleet modernization

    vindhyagiri

    Central Idea

    • President’s launch of INS Vindhyagiri, the final vessel in the Project 17A (Alpha) frigates series, marked a significant milestone for India’s maritime strength and self-reliance.
    • The launch of INS Vindhyagiri, the sixth vessel in the Project 17A Frigates series, carries forward India’s naval legacy.

    About INS Vindhyagiri

    • INS Vindhyagiri is the sixth ship of the Project 17A Frigates series, showcasing India’s commitment to indigenous defense technology and self-reliance.
    • After INS Nilgiri, Udaygiri, Himgiri, Taragiri, and Dunagiri, INS Vindhyagiri derives its name from a mountain range in Karnataka.
    • These frigates are a follow-on class of the Project 17 (Shivalik Class) Frigates, integrating improved stealth, advanced weapons, and cutting-edge sensors.
    • It is built by Garden Reach Shipbuilders and Engineers (GRSE) in Kolkata, India.

    Key features

    • Employs a cutting-edge propulsion system enabling speeds of over 28 knots, ensuring rapid response and agility in various operational scenarios.
    • Equipped with state-of-the-art stealth features, enhancing its ability to operate discreetly and minimize detection.
    • Over 75% of the equipment and systems used are sourced from indigenous firms, including Micro, Small, and Medium Enterprises (MSMEs).

    Back2Basics: Project 17A

    • Project 17 Alpha frigates (P-17A) were launched by the Indian Navy in 2019.
    • The first stealth ship launched was the Nilgiri, launched in 2019.
    • The project was launched to construct a series of stealth guided-missile frigates, which are currently being constructed by two companies:
    1. Mazagon Dock Shipbuilders (MDL) and
    2. Garden Reach Shipbuilders & Engineers (GRSE).
    • These guided-missile frigates have been constructed with a specific stealth design, which has radar-absorbent coatings and is low-observable which can make its approach undetectable for the enemies.
    • The new technology also reduces the infrared signals of the ship.
  • Russian Invasion of Ukraine: Global Implications

    Places in news: Murmansk Port

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Murmansk Port

    Mains level: NA

    murmansk

    Central Idea

    • India’s engagement with Russia’s Arctic region has been strengthening with India-bound goods constituting the maximum share of cargo handled this year by Murmansk, located about 2,000 km northwest of Moscow.

    About Murmansk Port

    • Murmask Port is a major seaport located in northwestern Russia, specifically in the city of Murmansk.
    • The port was established in 1916 as a supply point for the Russian military during World War I.
    • It is situated in the city of Murmansk, which is the largest city north of the Arctic Circle in Russia.
    • It is located on the Kola Peninsula on the shores of the Barents Sea.
    • The port serves as a crucial gateway to the Arctic region.
    • The port is an important node along the Northern Sea Route, a shipping route that connects Europe and Asia via the Arctic Ocean.
    • Its ice-free waters enable year-round maritime activities, making it an important hub for shipping and trade in the Arctic.

    Significance of the Port

    • Murmansk Port is strategically located near rich natural resources, including minerals, oil, and gas in the Arctic region.
    • It plays a role in facilitating the export of these resources.
    • The port is well-connected to various transportation networks, including railroads, pipelines, and roads.
    • It serves as a hub for moving goods to and from the Arctic and the rest of Russia.
  • Modern Indian History-Events and Personalities

    President pays tribute to Matangini Hazra, Kanaklata Barua

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Matangini Hazra, Kanaklata Barua

    Mains level: Not Much

    kanaklata

    Central Idea

    • On the eve before Independence Day, President of India paid tributes to great women freedom fighters like Matangini Hazra and Kanaklata Barua.

    [A] Matangini Hazra

    • Early Life and Dedication: Born in 1869 in Hogla village, West Bengal, Matangini Hazra’s early life was marked by poverty and lack of formal education. She married at a young age and was widowed by 18. Devoted to social causes, she emerged as a dedicated freedom fighter.
    • Gandhian Influence: During the Nationalist movement, Hazra’s admiration for Mahatma Gandhi earned her the nickname “Gandhiburi” in her village. She actively participated in protests, earning her several arrests and jail sentences.
    • Quit India Movement: A prominent leader during the Quit India Movement of 1942, Hazra led a procession of around 6,000 protesters, mostly women, towards the Tamluk police station. She was shot three times by British police during a confrontation, and she passed away at the age of 73 while chanting “Vande Mataram.”
    • Legacy: Matangini Hazra’s sacrifice inspired revolutionaries to establish local governments. In 1977, the first statue of a woman revolutionary in Kolkata Maidan was dedicated to her. Schools, streets, and neighborhoods across Bengal are named after her as a tribute to her immense contribution to the freedom struggle.

    [B] Kanaklata Barua

    • Young Martyr: Kanaklata Barua, a symbol of courage, was just 17 years old when she became a martyr. She led the Mrityu Bahini procession to unfurl the Tricolour at Gohpur police station in Assam during the Quit India Movement.
    • Daring Spirit: Despite the age limit for joining the Mrityu Bahini being 18 and above, Barua’s determination led her to be an exception. Just two days into joining, she was at the head of the procession, holding the Tricolour.
    • Tragic End: In a confrontation with the police at the police station, Barua refused to let go of the flag, even as bullets rained down. She fell, holding onto the flag until another volunteer took it from her. Her bravery and sacrifice left an indelible mark on the movement.
    • Legacy: Kanaklata Barua’s story continues to inspire generations. In her honor, the Coast Guard named a Fast Patrol Vessel “ICGS Kanaklata Barua” in 2020, ensuring that her legacy lives on as a testament to her remarkable spirit and dedication to India’s freedom.
  • Modern Indian History-Events and Personalities

    Karnail Singh Isru’s contribution in Goan Liberation

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Karnail Singh Isru, Goan Liberation

    Mains level: Not Much

    karnail

    Central Idea

    • Karnail Singh Isru, a valiant activist, is remembered with reverence and admiration on India’s Independence Day.
    • He made the ultimate sacrifice while participating in the Goa Liberation Movement, striving for the state’s accession to India.

    Who was Karnail Singh Isru?

    • Birth and Childhood: Born on September 9, 1930, in Chak 30 village (now in Pakistan), Isru lost his father at a young age and was raised by his mother. His upbringing was marked by a strong sense of justice and a longing for freedom.
    • Inspired by National Heroes: Isru’s admiration for national heroes like Bhagat Singh and Udham Singh, along with their dedication to the freedom movement, ignited a fire within him. Their struggle against colonial oppression left a deep impact on his young mind.

    Joining the Goa Liberation Movement

    • Formation of Ideals: Isru’s involvement in student activism and his presidency of the student union highlighted his commitment to social justice. He joined the Communist Party of India (CPI) and embraced rationalist ideals.
    • Goa Liberation Movement: In the 1950s, despite India’s independence, the territories of Goa, Daman and Diu, and Dadra and Nagar Haveli remained under Portuguese rule. CPI sent Satyagarhis, followers of Gandhian principles, to Goa to hoist the Indian flag on Independence Day.

    His Fateful Journey

    • Sahodrabai Rai’s Leadership: Isru, alongside other Satyagarhis, embarked on the march towards Goa under the leadership of Sahodrabai Rai. They aimed to challenge colonial rule and establish India’s sovereignty in the region.
    • Tragedy Strikes: As they entered the Patradevi village in North Goa, Portuguese forces opened fire on the Satyagarhis. Isru’s unwavering determination led him to the forefront, but tragically, he was struck by a bullet in his chest. His sacrifice was a significant moment in the fight for Goa’s liberation.

    Legacy and Remembrance

    • Tributes in Punjab: Isru’s memory is etched in the heart of Punjab, where the government and political parties organize annual functions to honor his sacrifice. A statue, library, park, and school bear his name, reflecting the respect he commands.
    • Recognition in Goa: In Goa, a bronze bust of Isru was installed in the primary school of Patradevi village, commemorating his sacrifice. His bravery and dedication are a source of inspiration for generations.

    Also read:

    In news: Goa Liberation Day

  • ISRO Missions and Discoveries

    ISRO gears up for Aditya-L1 Mission

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Aditya L1 mission

    Mains level: Not Much

    aditya-l1

    Central Idea

    • Although the mission launch date is yet to be announced, the Aditya-L1 satellite has arrived at the Satish Dhawan Space Center (SDSC) in Sriharikota, Andhra Pradesh, for integration with the launch vehicle, PSLV.

    Aditya-L1 Mission

    • Aditya-L1’s primary objective is to closely observe the Sun and gather insights into its corona, solar emissions, flares, solar winds, and Coronal Mass Ejections (CMEs).
    • The satellite is equipped with seven advanced payloads for these scientific endeavors.
    • The mission promises round-the-clock imaging of the Sun, enabling an unprecedented understanding of its behavior and impacts.

    Significance of the mission

    • Solar Influence: The evolution of every celestial body, including Earth and distant exoplanets, is intricately linked to its parent star. The Sun’s weather and environment have a profound impact on the entire solar system.
    • Space Weather Impact: Variations in solar activity can disrupt satellite orbits, damage electronics, trigger power blackouts, and induce disturbances on Earth. Accurate knowledge of solar events is essential for comprehending and predicting space weather phenomena.

    L1 Lagrange Point Advantage

    • Continuous Solar Observations: Positioned at the Lagrangian Point 1 (L1) — about 1.5 million km from Earth — Aditya-L1 will be uniquely positioned to observe the Sun without the interference of occultation or eclipses. L1 is an orbital location where gravitational forces create stable regions of attraction and repulsion.
    • L1’s Significance: The Solar and Heliospheric Observatory Satellite (SOHO) is stationed at L1 and has facilitated groundbreaking solar research. Aditya-L1’s observations will contribute to a more comprehensive understanding of solar behavior.

    Comparison with International Missions

    • Closer than Ever: While NASA’s Parker Solar Probe has ventured closer to the Sun, Aditya-L1 will focus on direct solar observations from a greater distance.
    • Technical Challenges: Many instruments and components for Aditya-L1 are being developed in India for the first time, representing both a challenge and an opportunity for the nation’s scientific and engineering communities.
  • RBI Notifications

    Public Tech Platform for Frictionless Credit

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Features of the platform

    Mains level: Not Much

    Central Idea

    • The Reserve Bank of India (RBI) has unveiled a Public Tech Platform for Frictionless Credit to transform credit accessibility and lending efficiency.

    About the Public Tech Platform 

    • It is developed by the RBI’s subsidiary Reserve Bank Innovation Hub (RBIH).
    • It aims to streamline the credit delivery process by enabling seamless digital information flow to lenders.
    • It intends to simplify the credit assessment by providing an end-to-end digital ecosystem that facilitates the smooth exchange of essential digital data among stakeholders.

    Features of the Platform

    • Open Architecture: The platform adopts an open architecture model, fostering interoperability and collaboration among various financial sector players.
    • Plug and Play Model: The open Application Programming Interfaces (APIs) and standards enable seamless integration and interaction among participating entities.
    • Efficiency and Scalability: The platform aims to enhance lending efficiency, reduce costs, expedite disbursement, and scale up lending operations.

    Launch and Scope

    • Calibrated Rollout: The platform is set to launch as a pilot project on August 17, 2023, with gradual access to information providers and use cases.
    • Initial Focus: The pilot phase will focus on credit products like Kisan Credit Card loans, dairy loans, collateral-free MSME loans, personal loans, and home loans.
    • Integration and Services: The platform will integrate services such as Aadhaar e-KYC, state government land records, satellite data, PAN validation, Aadhaar e-signing, account aggregation, and more.
  • Modern Indian History-Events and Personalities

    Red Fort’s symbolism for Independence Day

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Red Fort

    Mains level: Not Much

    red fort

    Central Idea

    • Every year on August 15, India commemorates its Independence Day with the hoisting of the national flag at the iconic Red Fort in Delhi.
    • This historic tradition, initiated by Prime Minister Jawaharlal Nehru, holds deep significance in India’s journey towards self-rule and liberation from colonial rule.

    About Red Fort

    • Constructed by: The Red Fort, also known as “Lal Qila” in Hindi, was constructed during the reign of the Mughal Emperor Shah Jahan. Its construction began in 1638 and was completed in 1648. It was designed to be the main residence of the Mughal emperors.
    • Architectural Marvel: The Red Fort is a masterpiece of Mughal architecture, characterized by its red sandstone walls and intricate marble decorations. It combines Persian, Timurid, and Indian architectural styles.
    • UNESCO World Heritage Site: The Red Fort was designated as a UNESCO World Heritage Site in 2007. It is recognized for its historical and cultural significance and its exceptional architectural design.
    • Layout: The Red Fort is a massive structure with walls extending over 2 kilometers. It is designed in the shape of an irregular octagon, with two main entrances: the Lahore Gate and the Delhi Gate.
    • Diwan-i-Aam and Diwan-i-Khas: The complex houses the Diwan-i-Aam (Hall of Public Audience) and the Diwan-i-Khas (Hall of Private Audience). The former was used for addressing the general public, while the latter was reserved for private meetings and discussions.
    • Mumtaz Mahal: Within the complex, there is a white marble structure known as Mumtaz Mahal, often mistaken for the Taj Mahal. It is the burial place of Shah Jahan’s wife Mumtaz Mahal.

    Historical Significance of the Red Fort

    • Delhi Sultanate and Mughal Era: Under the Delhi Sultanate and Mughal rule, Delhi emerged as a pivotal capital city. It became synonymous with the seat of power, and the Mughals established their dominion from the magnificent Red Fort.
    • Symbolic Rulership: The Mughal emperors’ association with Delhi granted them symbolic legitimacy even as their actual authority waned. They continued to be recognized as the sovereign rulers of India, despite their diminishing control.
    • Rebellion of 1857: The Rebellion of 1857 further emphasized the Red Fort’s symbolic significance. The rebels rallied around the aged Mughal Emperor Bahadur Shah Zafar, underscoring the fort’s role as a rallying point for indigenous authority.

    Impact of British Imperialism

    • British Rule and Red Fort: After suppressing the Rebellion of 1857, the British retained the Red Fort but stripped it of its grandeur. They transformed the fort into a British garrison, erasing elements of its Mughal heritage.
    • Co-opting Symbolism: Despite reducing Delhi’s significance, the British recognized its symbolic importance. The Delhi Durbars and the decision to shift the capital to Delhi from Calcutta highlighted its centrality and authority.

    Red Fort and India’s Independence Struggle

    • INA Trials: The Red Fort regained prominence during the Indian National Army (INA) trials, where INA officers were tried for treason. These trials evoked nationalistic sentiments and established the Red Fort as a symbol of resistance against British oppression.
    • Reclaiming for Independence: As India approached independence, Nehru’s decision to hoist the national flag at the Red Fort in 1947 symbolized the reclamation of this historical site from British colonial rule. It marked the assertion of India’s sovereignty and the culmination of its struggle for freedom.

    Key events

    • INA Trials: The Red Fort played a crucial role in the trials of the Indian National Army (INA) officers in the mid-1940s. The trials stirred nationalist sentiments and highlighted the site as a symbol of resistance against British rule.
    • Nehru’s Flag Hoisting: Jawaharlal Nehru’s decision to hoist the national flag from the Red Fort on August 15, 1947, signified the reclamation of the site from colonial dominance and marked India’s emergence as a sovereign nation.

    Annual Celebration and Symbolism

    • Continuing Tradition: The tradition of hoisting the national flag and delivering the Independence Day address from the Red Fort continues to this day.
    • Reclamation of Identity: The celebrations at the Red Fort annually emphasize the triumph of India’s struggle for independence and the reclaiming of its cultural and historical identity from colonial rule.
  • Tribes in News

    Evolution of the Malaiyali Tribe

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Malaiyali Tribe

    Mains level: Not Much

    malaiyali

    Central Idea

    • The Malaiyali tribe, scattered across Tamil Nadu’s hilly regions, has undergone a remarkable transformation over two centuries.
    • From their initial foraging lifestyle to settling atop the Yelagiri hill and constructing traditional clay huts, the tribe has transitioned into a more modern way of life.
    • Amidst the evolving landscape, one old-fashioned hut remains as a testament to their history.

    Malaiyali Tribe

    • Historical Settlement: Over 200 Malaiyali tribespeople established a comprehensive system on Yelagiri hill with clay huts for shelter, storage, farming, and cattle.
    • Modern Evolution: Today, only one antiquated hut endures, belonging to tribesman Govinthasamy, while the rest have given way to brick-and-mortar homes.
    • Malaiyali Tribe: “Malai” means hill and “yali” means people, depicting the tribespeople who settled across Tamil Nadu’s hilly regions.

    Significance of Red Clay

    • Integral Material: Red clay played a pivotal role in building huts, burying the dead, and sustaining the tribe’s lifecycle from birth to death.
    • Unique Construction: Huts were constructed with red clay on teak wood frames, embodying the tribe’s connection to nature.
    • Practicality and Value: Despite its worn appearance, the hut holds immense value due to the scarcity and high cost of materials like teak wood.

    Distinctive Hut Features

    • Roofing: A 12-foot thatched roof made of dry bamboo leaves, waxed with cow dung to prevent leaks during monsoons.
    • Interior Space: Deceptively small from outside, the hut accommodates eight people and an attic for storing household items.
    • Functional Evolution: Originally meant for living, the hut transformed into a storage space for seeds during sowing and grains post-harvest.
    • Elevated Structure: The hut stands on a teak wood stilt to prevent flooding during heavy rains and deter rodents.
    • Storage Space: Stilts create additional storage beneath the house for grains or poultry.
    • Traditional Living: The one-room structure housed various activities, highlighting the tribe’s reliance on agriculture.