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Archives: News

  • Disasters and Disaster Management – Sendai Framework, Floods, Cyclones, etc.

    Akshvi Platform for Disaster Damage Reporting

    Why in the News?

    India has introduced Akshvi, a unique e-digital wallet aimed at assisting in disaster relief and improving the accuracy of loss reporting.

    About Akshvi: The E-Digital Wallet for Disasters

    • Akshvi (Aapda Kshati Vivaran) is a unique e-digital wallet developed by SEEDS India to assist disaster-stricken communities in India.
    • The platform allows people to self-report economic and non-economic losses during climate-induced events.
    • It bridges the data gap in disaster reporting and enhancing relief distribution and climate resilience.

    Key Features of Akshvi:

    • Self-Reporting Mechanism: It enables affected communities to log their losses during disasters such as floods, droughts, heatwaves, and landslides, ensuring accurate and timely assessments.
    • Localized Data Collection: The platform collects hyperlocal data, which is vital for tailoring disaster management strategies and relief efforts to the specific needs of affected communities.
    • User-Friendly Interface:
      • IVRS: Allows voice recording of losses.
      • WhatsApp Chatbot: For tech-savvy users to log data.
      • Assisted Data Entry: Available for those needing help with information entry.
    • Traceability: The platform tracks the progress of relief, ensuring that aid reaches the affected households transparently.
    • Integration with Government Schemes: Akshvi’s data links to social welfare schemes and index-based insurance programs, improving disaster response efforts.
    [UPSC 2004] In which one of the following countries did hundreds of people die in 2004 due to Tropical Storm Jeanne?

    Options: (a) Colombia  (b) Haiti (c) Sudan (d) Ghana

     

  • Wildlife Conservation Efforts

    Species in news: Musk Deer

    Why in the News?

    A recent report by the Central Zoo Authority (CZA), highlights the absence of any breeding programme for musk deer.

    Species in news: Musk Deer

    About Musk Deer:

    • The Himalayan Musk Deer (Moschus leucogaster) is an endangered species native to the Himalayas, found in India, Nepal, Bhutan, Pakistan, and China.
    • It inhabits altitudes of 2,200 to 4,300 meters, primarily in alpine forests and scrublands.
    • Behaviour: Solitary, nocturnal, and territorial. Males have long, curved canine teeth and a musk gland, which is highly valued and targeted by poachers.
    • It plays a key role in seed dispersal, helping maintain the balance of the alpine ecosystem.
    • Threats: Poaching for their musk glands, habitat loss from deforestation, and genetic issues due to fragmented populations.

    Conservation Initiatives:

    • Protection Status:
      • It is listed as Endangered on the IUCN Red List.
      • It is listed under Schedule I of the Wildlife (Protection) Act, 1972, offering the highest protection under Indian law.
    • Protected Areas:
      • Kedarnath Wildlife Sanctuary: Established in 1972, covering 975 km² in the western Himalayas, crucial for musk deer conservation.
      • Askot Musk Deer Sanctuary: Located in Uttarakhand, dedicated specifically to musk deer conservation.
    • Himalayan Musk Project (1982): Aimed at captive breeding within Kedarnath Sanctuary but faced setbacks due to disease, snake bites, and poor survival rates. The project was shut down in 2006.
    [UPSC 2020] Which of the following are the most likely places to find the musk deer in its natural habitat?

    1. Askot Wildlife Sanctuary

    2. Gangotri National Park

    3. Kishanpur Wildlife Sanctuary

    4. Manas National Park

    Select the correct answer using the code given below:

    Options: (a) 1 and 2 only (b) 2 and 3 only (c) 3 and 4 only (d) 1 and 4 only

     

  • Innovations in Biotechnology and Medical Sciences

    Role of Lipids in Protein Function and Co-Evolution

    Why in the News?

    New research by CSIR-Centre for Cellular and Molecular Biology, Hyderabad suggest that lipids (along with DNA), particularly in mitochondrial membranes, are not just structural elements but play an integral role in the function and evolution of proteins.

    About Lipids and RC1 in Cells:

    Lipids:

    • Lipids, including fats, phospholipids, and sterols, make up to 30% of the dry weight of cells.
    • They are crucial for membrane integrity and various biological processes.
    • They vary in fatty acid composition and length, influenced by genetics, diet, and environmental factors.
    • They form a bilayer in membranes, with hydrophilic heads facing outward and hydrophobic tails inward, providing stability and enabling protein function.
    • Role of Lipids in Cells:
      • Lipids form the bilayer, providing flexibility and stability for membrane proteins that perform functions like receptor binding and ion channelling.
      • They like cardiolipin stabilize RC1 and other respiratory complexes, aiding energy production.

    RC1 (Respiratory Complex 1):

    • RC1 is a protein complex in the mitochondrial membrane, crucial for cellular respiration and energy production.
    • It is composed of 44 proteins, some synthesized in the cytoplasm and others in mitochondria.
    • Mutations in RC1 lead to diseases due to its vital role in respiration.

    Lipid-Protein Co-evolution as per new Research:

    • New research highlights the co-evolution of proteins and lipids, especially in mitochondrial membranes, where proteins interact with specific lipids from their own kingdom (plant or animal).
    • Plant lipids, richer in polyunsaturated fatty acids, are more flexible, aiding stress resistance, while animal lipids evolve differently to meet their needs.
    • Lipid-protein co-evolution adds complexity to cellular evolution, with implications for human health and disease treatment.
    [UPSC 2001] Which of the following cell organelles play the most significant role in protein synthesis?

    Options: (a) Lysosome and Centrosome (b) Endoplasmic reticulum and Ribosome* (c) Golgi apparatus and Mitochondria (d) Lysosome and Mitochondria

     

  • [23rd April 2025] The Hindu Op-ed: Exploring India’s potential in the Arctic region

    PYQ Relevance:

    [UPSC 2018] Why is India taking keen interest in resources of Arctic Region?

    Linakge: India’s interest in the Arctic’s resources, which is a central theme in the Article. This article highlights the Arctic as a “critical energy source for the Global South” and mentions India’s potential stake in the “massive resources” of the region.

     

    Mentor’s Comment:  Global trade is shifting due to U.S. pressures and climate change, prompting countries to explore new supply chains and routes. The Arctic, while warning of a climate crisis, offers major geopolitical and economic potential. As new trade paths open, India must ensure it has a role in future Arctic opportunities without harming the fragile environment.

    Today’s editorial highlights why the Arctic region matters for the world and India. This topic is useful for GS Paper 2 (international relations) and GS Paper 3 (environment and economy) in the mains exam.

    _

    Let’s learn!

    Why in the News?

    India should have a voice in the future economic opportunities of the Arctic, without rushing to exploit its resources recklessly.

     [ 23rd April 2025] The Hindu Op-ed: Exploring India’s potential in the Arctic region

    What is the Northern Sea Route (NSR)? 

    • The Northern Sea Route (NSR) is a new Arctic sea route connecting the Atlantic Ocean to the Pacific Ocean, running along the northern coast of Russia.
    • It provides the shortest maritime route between Europe and Asia, significantly reducing shipping distances. Eg: Shipping from Rotterdam to Shanghai via the NSR cuts the journey by around 30%, reducing travel time by approximately 10 days.

    How could it transform global trade?

    • Reduced Freight Costs: By providing a more direct and shorter route, the NSR can substantially lower shipping costs, as vessels spend less time on the water and consume less fuel. Eg: The cost savings from the reduced travel time and fuel consumption can incentivize global shipping companies to shift their operations to the NSR, especially for bulk goods and high-value cargo.
    • Expedited Global Trade: The NSR could drastically speed up the flow of goods, particularly for time-sensitive cargo like electronics, automotive parts, and perishable goods, thus improving global trade efficiency. Eg: In 2018, a Chinese cargo ship made a successful voyage through the NSR, delivering goods from China to Europe in a record time of 18 days, compared to the traditional 40+ days via the Suez Canal.
    • Opening New Markets: The NSR could lead to the development of new ports and shipping routes in the Arctic, creating economic opportunities for the countries surrounding the region. It can also open up access to new markets that were previously difficult to reach. Eg: As traffic on the NSR increases, ports like Murmansk in Russia and Pevek in the Arctic will see growth, transforming them into significant maritime hubs.

    Why is the Arctic region becoming geopolitically and economically important for India?

    • New Trade Routes: The Northern Sea Route (NSR) opens shorter, more efficient shipping lanes between Europe and Asia, benefiting India’s trade by reducing shipping times and costs. Eg: The NSR offers India quicker access to European markets, enhancing trade competitiveness.
    • Energy Resources: The Arctic region holds vast untapped oil and natural gas reserves, offering India potential access to energy resources vital for its growing needs. Eg: Arctic exploration could help diversify India’s energy sources, ensuring a more secure supply.
    • Climate Research: The Arctic’s rapid changes influence global climate patterns, impacting India’s monsoon and agricultural productivity. Eg: Research on the Arctic’s climate helps India prepare for shifts in its monsoon patterns and protect food security.
    • Geopolitical Influence: India’s involvement in Arctic governance could strengthen its global position and foster partnerships with key nations like Russia and the U.S. Eg: By engaging in Arctic policy, India enhances its diplomatic and strategic ties with major global players.
    • Maritime Security: India’s access to the Arctic region can improve its maritime security and help protect vital trade routes. Eg: Strengthening Arctic partnerships can ensure India’s strategic interests in the region are safeguarded.

    When did India formalise its Arctic policy, and what are its key goals?

    Focus Area Key Objectives
    Scientific Research and Climate Understanding Enhance scientific knowledge about the Arctic’s effect on global climate, especially the Indian monsoon and agriculture. Strengthen research stations like Himadri and use space technology for Arctic studies.
    Environmental Protection and Sustainable Development Promote protection of the Arctic environment and support sustainable development. Encourage responsible use of resources and partner with Arctic nations on green energy.
    Enhanced International Cooperation and Capacity Building Actively participate in Arctic governance (e.g., Arctic Council), improve India’s expertise in Arctic studies, and collaborate on digital connectivity and indigenous knowledge exchange.

    Who are India’s potential strategic partners in the Arctic region?

    • Russia: India sees Russia as a key partner in the Arctic due to its extensive Arctic coastline and expertise in Arctic navigation. The two countries have established a working group under the bilateral intergovernmental commission to explore opportunities in Arctic trade routes like the Northern Sea Route (NSR) and potential joint ventures. Eg, the Chennai-Vladivostok Maritime Corridor is seen as a bridge to the NSR.
    • Japan and South Korea: Japan and South Korea are also critical partners due to shared concerns over China’s increasing influence in the Arctic. These nations and India aim to promote a more inclusive Arctic Council and ensure equitable access to Arctic resources, countering Chinese dominance in the region.

    What are the challenges involved? 

    • Harsh Environmental Conditions: The Arctic’s extreme weather and icy waters present significant challenges for navigation and shipping. India will need to invest heavily in specialised ice-breaking fleets and infrastructure to ensure safe and efficient passage along the Northern Sea Route (NSR). Eg, the need for shipbuilding suited to Arctic conditions was highlighted in India’s 2025-26 Budget.
    • Geopolitical Tensions: The Arctic region is becoming a battleground for global powers, with competing interests between the U.S., Russia, and China. India faces the dilemma of balancing relations with both Russia and the Western bloc while ensuring its interests in Arctic trade routes and resources. Eg, supporting Russia’s Arctic ambitions could align India with China’s Polar Silk Road, creating a potential conflict with U.S. interests.
    • Environmental Impact and Climate Change: Exploiting Arctic resources poses risks to the fragile ecosystem, and climate change further exacerbates these concerns. India must balance its commercial interests with environmental responsibility, ensuring that Arctic exploration does not contribute to further ecological degradation. Eg, global temperatures breaching 1.5°C in 2024 highlight the urgency of sustainable development in the Arctic.

    How should India balance environmental concerns with commercial interests in the Arctic? (Way forward) 

    • Sustainable Resource Management: India should advocate for responsible exploration and use of Arctic resources, ensuring that commercial activities do not harm the fragile environment. This includes supporting international regulations on sustainable practices and climate-resilient policies. Eg, India’s engagement in the Arctic Council can help influence global guidelines for Arctic resource extraction, focusing on minimal environmental disruption.
    • Collaborative Efforts with Like-minded Nations: India should collaborate with countries that share its concerns about environmental protection, such as Japan and South Korea, to promote sustainable Arctic governance. By forging partnerships focused on environmental preservation and responsible trade, India can secure both economic opportunities and environmental integrity. Eg, India, Japan, and South Korea have common interests in mitigating Chinese influence in Arctic policies, emphasising eco-friendly development.
  • Electoral Reforms In India

    A move that endangers the right to vote

    Why in the News?

    The Election Commission of India (ECI) is again trying to link Aadhaar with voter ID, claiming it will help remove fake voters, clean up the voter list, and make elections more fair. However, this move could put people’s right to vote at risk.

    Why is Aadhaar-Voter ID linkage seen as a threat to voting rights?

    • Risk of Mass Disenfranchisement: Linking Aadhaar with voter ID can lead to the wrongful deletion of genuine voters from electoral rolls due to data mismatches or errors in the Aadhaar database. Eg: In 2015, during the National Electoral Roll Purification and Authentication Programme, over 55 lakh voters were arbitrarily removed in Telangana and Andhra Pradesh, causing many to discover their names missing only on election day.
    • Violation of the Right to Privacy and Autonomy: The linkage forces citizens to part with their Aadhaar information, effectively making a voluntary scheme coercive. It exposes citizens to data misuse and profiling by political actors. Eg: Form 6B requires Aadhaar submission or a declaration of non-possession, with no real opt-out, pressuring citizens to comply.
    • Disproportionate Impact on Vulnerable Groups: Groups like the elderly, disabled, migrant workers, and rural residents face practical challenges in appearing before Electoral Officers to justify not having Aadhaar, putting their right to vote at risk. Eg: The proposed requirement for in-person appearance imposes an unreasonable burden, especially for people in remote or underserved areas.

    How does the linkage affect vulnerable groups?

    • Imposes Unreasonable Physical Burden: The requirement for in-person appearances before Electoral Registration Officers disproportionately affects individuals who may not be able to travel easily. Eg: Elderly citizens or persons with disabilities may find it extremely difficult to justify their non-submission of Aadhaar physically, leading to potential exclusion from the voter list.
    • Excludes Migrants and Remote Populations: Migrant workers and people living in remote or underdeveloped regions may not have updated documents or easy access to Aadhaar centers, making compliance difficult. Eg: Migrant laborers, often on the move, may not have consistent records, leading to their disenfranchisement due to Aadhaar mismatches or absence.
    • Leads to Arbitrary Deletions from Electoral Rolls: Errors in Aadhaar data or failure to link properly can result in the deletion of legitimate voters, especially those lacking digital literacy or assistance. Eg: During the 2015 Aadhaar-linking exercise, many daily wage workers and marginalized citizens in Andhra Pradesh and Telangana found their names deleted without prior notice.

    Which past events highlight the risks of this linkage?

    • 2015 Deletions under National Electoral Roll Purification and Authentication Programme (NERPAP): The Election Commission attempted Aadhaar-voter ID linkage in 2015, leading to large-scale deletion of genuine voters due to data mismatches. Eg: In Telangana and Andhra Pradesh, over 55 lakh voters were removed from rolls. Many citizens discovered this only on polling day, causing mass disenfranchisement.
    • Supreme Court Stay in August 2015: Following the backlash from the 2015 deletions, the Supreme Court stayed the Aadhaar-voter ID linkage to prevent further voter exclusion. Eg: The Court’s order halted the programme, citing privacy concerns and lack of legal backing, highlighting the constitutional risks involved.
    • CAG Report on Aadhaar Database Flaws (2021): The Comptroller and Auditor General found serious flaws in the Aadhaar system, including duplications and unverifiable residency, raising concerns about its suitability for electoral verification. Eg: The CAG audit revealed that 4.75 lakh Aadhaar numbers were cancelled due to errors and duplication, showing how flawed data could wrongly affect voter rolls.

    Way forward: 

    • Traditional Voter Verification Methods: Instead of relying on Aadhaar, the ECI should strengthen manual verification systems. Eg: Door-to-door verification by Booth Level Officers (BLOs) and in-person checks help maintain accuracy and uphold voter rights without risking exclusions.
    • Independent Audits and Social Oversight: Introducing social audits and independent reviews of electoral rolls can enhance transparency and trust in the system. Eg: Public grievance redressal mechanisms and independent monitoring can prevent politically motivated manipulation and ensure fairness.

    Mains PYQ:

    [UPSC 2024] Examine the need for electoral reforms as suggested by various committees with particular reference to “one nation-one election” principle.

    Linakege: “one nation-one election,” it falls under the broader theme of electoral reforms. The article  discusses a specific electoral reform, the Aadhaar-voter ID linkage, and argues that it has negative consequences for the right to vote. Therefore, this PYQ, concerning the need for and nature of electoral reforms, is relevant as the Aadhaar linking initiative can be seen as a debated electoral reform with potential risks to the franchise.

  • Monsoon Updates

    Food prices may remain low if IMD’s prediction holds true

    Why in the News?

    According to the India Meteorological Department’s first forecast for 2025, the country may receive around 105% of the average rainfall, with a possible variation of 5% more or less.

    What is the India Meteorological Department’s (IMD) forecast for the 2025 monsoon?

    • Above Normal Rainfall Predicted: IMD forecasts 105% of the Long Period Average (LPA) rainfall for 2025, with a margin of ±5%. Eg: In 2024, India received 108% of LPA, which was categorized as ‘above normal’ rainfall.
    • LPA Reference and Classification: The LPA for the period 1971–2020 is 87 cm. Based on this, rainfall is classified as: Above Normal: 105–110% of LPA. Eg: If the rainfall is 105% of LPA, it falls within the ‘above normal’ range.
    • Improved Forecasting Methodology: Since 2021, IMD uses a multi-model ensemble system, combining global climate models with IMD’s own models, improving forecasting accuracy. Eg: Forecasts since the adoption of this system have shown improved accuracy, reducing error margins from previous years.

    Why is rainfall distribution crucial for agriculture?

    • Impact on Crop Growth: Uneven or poor rainfall distribution can lead to crop stress or failure. Plants depend on consistent water supply during different growth stages. Eg: In 2024, excess rainfall in Maharashtra led to the destruction of onion crops, while deficient rainfall in Punjab delayed paddy sowing, driving up food costs.
    • Effect on Water Availability: Proper rainfall distribution ensures water availability throughout the growing season, which is essential for irrigation systems and groundwater recharge. Eg: If regions like Tamil Nadu receive excess rainfall while other areas like Uttar Pradesh experience drought, it can disrupt the balance, making water management challenging.
    • Geographical Variability and Crop Suitability: Different crops require specific rainfall amounts at different times, so spatial distribution of rainfall is essential for crop selection and yield maximization. Eg: In 2023, Telangana and Puducherry received excess rainfall, benefiting crops like rice, but Bihar faced a below-normal monsoon, impacting food grain production.

    When did IMD improve its forecasting model, and what changed?

    • Improvement Began in 2021: IMD improved its forecasting model by adopting a multi-model ensemble dynamical system in 2021. Eg: Prior to 2021, IMD primarily relied on statistical models, but the new system incorporates global climate models along with IMD’s own models for better accuracy.
    • Enhanced Accuracy with New Models: The introduction of the multi-model ensemble system improved forecast reliability, reducing errors in predictions. Eg: Forecasts post-2021 showed a significant improvement, with accurate predictions of rainfall in regions like Maharashtra and Tamil Nadu during the 2024 monsoon.
    • Reduction in Error Margins: The new approach resulted in reduced error margins, making the first forecasts closer to actual rainfall patterns. Eg: IMD’s first forecast for the 2024 monsoon had a relatively smaller error margin, improving the predictability of rainfall distribution across India compared to previous years.

    How do El Niño, La Niña, and IOD affect the monsoon?

    Weather Phenomenon Effect on Monsoon Example
    El Niño Weakens the monsoon due to warmer sea surface temperatures in the Pacific Ocean. This leads to reduced rainfall. Eg: 2014, El Niño conditions led to below-normal rainfall, causing droughts and poor crop production in India.
    La Niña Strengthens the monsoon due to cooler sea surface temperatures in the Pacific Ocean, which can lead to excessive rainfall in some areas. Eg: 2017, La Niña conditions contributed to above-normal rainfall, causing floods in some regions like Assam.
    Indian Ocean Dipole (IOD) Positive IOD can enhance rainfall, while a negative IOD can lead to drought conditions, especially if combined with El Niño. Eg: 2019, a positive IOD helped in normal rainfall despite El Niño, while 2020 had a negative IOD, exacerbating the impact of weak monsoon rainfall.

    Which regions saw abnormal rainfall in 2023, and what was the impact?

    • North and Northwest India: Excessive Rainfall: Heavy rainfall led to flash floods, landslides, and infrastructure damage. Eg: In Himachal Pradesh, intense rainfall triggered landslides and flash floods, resulting in at least 72 deaths and significant infrastructure damage.
    • Northeast India: Glacial Lake Outburst Floods (GLOFs): Sudden release of water from glacial lakes caused severe flooding, destruction of infrastructure, and loss of life. Eg: In Sikkim, a GLOF resulted in the deaths of at least 31 people, destruction of over 270 houses, and damage to 11 bridges.
    • Southern Peninsula: Deficient Rainfall: Reduced water availability affected agriculture, leading to crop stress and delayed sowing. Eg: In Tamil Nadu, deficient rainfall impacted the sowing of paddy, leading to concerns over food production.

    Way forward: 

    • Enhance Climate Resilience: Promote water management, drought-resistant crops, and crop diversification to mitigate impacts of uneven rainfall.
    • Improve Early Warning Systems: Strengthen forecasting and disaster preparedness to ensure timely responses to extreme weather events.

    Mains PYQ:

    [UPSC 2024] What are the causes of persistent high food inflation in India? Comment on the effectiveness of the monetary policy of the RBI to control this type of inflation.

    Linakge:  If the IMD’s prediction is accurate, a good monsoon could mitigate one of the key drivers of food inflation – erratic rainfall and lower agricultural output. This question asks about the causes of high food inflation; a good monsoon would work against these causes.

  • Article 355 of the Indian Constitution

    Why in the News?

    A recent petition in the Supreme Court has sought the invocation of Article 355 in West Bengal by deploying central armed forces, citing violence in Murshidabad.

    Recent Case:

    • Following violent protests in Murshidabad district against the Waqf (Amendment) Act, a petition was filed to invoke Article 355 in West Bengal.
    • The petitioner argued that the state was experiencing internal disturbances warranting Union intervention.​
    • The Court declined to pass immediate directions but allowed the petitioner to file a detailed application for further consideration. ​

    What is Article 355?

    • Article 355 mandates that the Union Government has the duty to protect every state against external aggression and internal disturbances and ensure that the state governments function in accordance with the Constitution.
    • It places responsibilities on the Union Government to maintain constitutional governance in all states.
    • It is often used alongside Article 356 to declare President’s Rule in a state.
    • It does NOT grant separate powers; instead, it operates in conjunction with Article 356 and Article 357.
    • Initially introduced as Article 277A in the Draft Constitution (1949), it clarified the Union’s role in intervening in state matters during exceptional circumstances.
    • Dr. B.R. Ambedkar emphasised that such intervention should not be arbitrary but based on constitutional obligations.
    • Judicial Interpretations:
      1. H.S. Jain v. Union of India (1996): The Supreme Court held that the Union is obligated under Article 355 to ensure state governments operate in line with the Constitution, quashing a state emergency declared under Article 356.
      2. S.R. Bommai v. Union of India (1994): The Court ruled that President’s Rule under Article 356 should be used sparingly and only when Union intervention is justified.
      3. Sarbananda Sonowal v. Union of India (2005): The Court upheld Union intervention under Article 355 due to illegal migration but cautioned against its use without substantial evidence.
    Note: Article 355 does NOT grant separate powers; instead, it operates in conjunction with Articles 356 and 357.

    • Article 356 allows the President to impose President’s Rule in a state if the governance in that state is not in accordance with the provisions of the Constitution.
    • Article 357 authorizes the President to extend the powers of the Union government to a state under President’s Rule and allows the Union government to exercise executive authority in the state.

     

    [UPSC 2003] Which one of the following Articles of the Indian Constitution provides that ‘It shall be the duty of the Union to protect every State against external aggression and internal disturbance’?

    Options: (a) Article 215 (b) Article 275 (c) Article 325 (d) Article 355*

     

  • International Space Agencies – Missions and Discoveries

    LEDA 1313424: The Bullseye Galaxy

    Why in the News?

    NASA’s Hubble Space Telescope recently discovered the Bullseye Galaxy (LEDA 1313424), which contains 9 rings, an unprecedented number.

    This finding offers new insights into galaxy evolution and the possibility of the galaxy evolving into a Giant Low Surface Brightness (GLSB) galaxy.

    Bullseye Galaxy

    About the Bullseye Galaxy (LEDA 1313424):

    • The Bullseye Galaxy is unique for containing 9 rings, an unprecedented number in the study of ringed galaxies.
    • Most ringed galaxies typically have 2 or 3 rings, making this discovery significant.
    • The rings are believed to have formed after a collision with a blue dwarf galaxy about 50 million years ago, causing ripples in the gas and creating star-forming regions that became the rings.
    • While individual stars’ orbits stayed the same, groups of stars gathered, forming distinct rings over time.
    • This discovery offers valuable insights into galaxy interactions and the rare formation of multiple rings.

    What are Giant Low Surface Brightness (GLSB) Galaxies?

    • GLSB Galaxies are large, diffuse galaxies with low surface brightness and fewer stars than typical galaxies, making them appear dimmer.
    • These galaxies contain vast hydrogen disks, the fuel for star formation, but their low hydrogen density prevents many stars from forming.
    • GLSB galaxies are believed to contain significant amounts of dark matter, affecting their mass distribution.
    • They have less dense inner regions and challenge current cosmological models due to their hydrogen content and low surface brightness.

    Bullseye Galaxy and Its Possible Evolution into a GLSB Galaxy:

    • It shares traits with GLSB galaxies, such as its extended disk and hydrogen content.
    • Researchers suggest that the Bullseye Galaxy might evolve into a GLSB galaxy, providing insights into the formation of such galaxies and the distribution of dark matter in the universe.
    [UPSC 2018] Consider the following phenomena:

    1. Light is affected by gravity. 2. The Universe is constantly expanding. 3. Matter warps its surrounding space-time.

    Which of the above is/are the prediction/predictions of Albert Einstein’s General Theory of Relativity, often discussed in the media?

    Options: (a) 1 and 2 only (b) 3 only (c) 1 and 3 only (d) 1, 2 and 3

     

  • International Space Agencies – Missions and Discoveries

    What is a Quantum Gravity Gradiometer (QGG)?

    Why in the News?

    NASA scientists have proposed using quantum technology to study gravitational changes on Earth by deploying a quantum gravity gradiometer (QGG) on a satellite in low-Earth orbit.

    About Gravity Gradiometer & Quantum Gravity Gradiometer (QGG):

    • A gravity gradiometer measures small variations in gravitational force over short distances.
    • How It Works: It detects differences in the acceleration of falling objects, indicating the density of materials below the surface, such as hydrocarbon deposits or geological structures.
    • Applications:
      • Oil Exploration: Detects underground hydrocarbon deposits by measuring gravitational differences.
      • Geological Studies: Used to explore subterranean features like minerals and fault lines.
    • A Quantum Gravity Gradiometer (QGG) uses quantum technology to achieve much higher precision than traditional gravity gradiometers.
      • How It Works: Atoms are cooled to near absolute zero and manipulated with lasers. The phase shifts of these atoms, proportional to gravitational force, detect tiny changes in gravitational acceleration.
      • It can detect changes as small as 10^-15 m/s² over just 1 meter, offering much finer measurements than traditional instruments.
    • Specifications: Weighs 125 kg, has a volume like a 250-liter oil drum, and consumes 350 watts of power (comparable to an older Intel CPU).

    Applications of QGG in Space:

    • Studying Gravitational Variations: Measures small changes in Earth’s gravitational field, aiding climate change studies, such as melting ice caps and shifting water reserves.
    • Earth’s Gravitational Field Mapping: Improves understanding of Earth’s internal structure and seismic activities.
    • Dark Matter Research: Provides insights into dark matter by detecting gravitational anomalies.
    • Satellite Navigation: Enhances space navigation and satellite positioning.
    • Mapping Underground Features: Used to map structures like mineral deposits and fault lines.
    • Security: Detects underground structures like military bunkers and natural disasters, offering valuable security information.
    [UPSC 2003] If the radius of the Earth were to shrink by one per cent, its mass remaining the same, the value of ‘g’ on the Earth’s surface would:

    Options: (a) Increase by 0.5% (b) Increase by 2% (c) Decrease by 0.5% (d) Decrease by 2%

     

  • Roads, Highways, Cargo, Air-Cargo and Logistics infrastructure – Bharatmala, LEEP, SetuBharatam, etc.

    Rishikesh-Karnaprayag Railway Tunnel

    Why in the News?

    India has marked a significant achievement in its railway infrastructure development with the “tunnel breakthrough” of Tunnel No. 8 on the Rishikesh-Karnaprayag Railway Line.

    Rishikesh-Karnaprayag Railway Tunnel

    About Rishikesh-Karnaprayag Railway Tunnel:

    • Tunnel No. 8 is a major part of the Rishikesh-Karnaprayag railway project, spanning 14.58 km, making it the longest transport tunnel under construction in India.
    • The tunnel is the first railway tunnel in the Himalayan region to use a Tunnel Boring Machine (TBM) (combining with the New Austrian Tunneling Method (NATM)) which reduces environmental disruption and increases efficiency compared to traditional blasting methods.
    • It is located on the Devprayag to Janasu stretch, which is part of the larger Rishikesh-Karnaprayag railway line project in Uttarakhand.
    • It is part of a larger plan to build a 125.20 km rail link, with 83% of the line to be tunnelled.
    • It will feature 12 new stations, 16 tunnels, and 19 bridges across five districts of Uttarakhand.
    • Safety measures include 12 escape tunnels and 7.05 km of cross passages to ensure passenger safety in case of emergencies.
    • This link will significantly improve connectivity to Uttarakhand’s hilly areas, reduce travel time, and boost economic activity in the region.
    [UPSC 2005] Consider the following statements concerning the Indian Railways:

    1. The Head Quarters of the North Western Railway are located at Jodhpur.

    2. ‘Indrail pass’ – a travel-as-you-please ticket has been created especially for freedom fighters and sportspersons who have represented India in any game/sport.

    3. Fairy Queen is a train using the world’s oldest working engine and the Indian Railways conduct a journey of wildlife and heritage sites on it.

    Which of the statements given above is/are correct?

    Options: (a) 2 only (b) 3 only (c) 1 and 2 (d) None*

     

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