💥Join UPSC 2027,2028 Mentorship (August Batch) + XFactor Notes & Microthemes PDF
Talk to Mentor

Civilsdaily

Login

Subject: Science and Technology

  • AgniKul ‘Agnibaan SOrTeD’ Mission

    Why in the news?

    • For the second time, the launch of AgniKul ‘Agnibaan SOrTeD’ has been postponed.
    • The IIT Madras-based Agnikul Cosmos was to test-fire an Agnibaan rocket with 3D-printed engine, aiming for suborbital flight trajectory control.

    What is Agnibaan SOrTeD (Suborbital Tech Demonstrator)?

    • 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.

    Distinct Features of Agnibaan:

    • Customizability: The rocket offers custom launch configurations, either single or two-stage launches.
    • 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.
    • Launch Pedestal ‘Dhanush’: AgniKul’s built ‘Dhanush’ supports the rocket’s mobility across configurations, ensuring compatibility with multiple launch ports.
    • Agnilet Engine: Agnilet engine, a 3D-printed, single-piece, 6 kN semi-cryogenic marvel, drives Agnibaan’s propulsion. The engine employs a novel blend of liquid kerosene and supercold liquid oxygen as propellants.

    PYQ:

    [2011] Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:

    1.    The orbit is geosynchronous.

    2.    The orbit is circular.

    3.    The orbit lies in the plane of the Earth’s equator.

    4.    The orbit is at an altitude of 22,236 km

    Select the correct answer using the codes given below:

    (a) 1, 2 and 3 only

    (b) 1, 3 and 4 only

    (c) 2 and 4 Only

    (d) 1, 2, 3 and 4

  • What is Project Akashteer?

    Why in the news?

    • The Indian Army’s Corps of Army Air Defense has initiated the induction of control and reporting systems under ‘Project Akashteer’ to bolster its air defense capabilities.

    About Project Akashteer

    • The Akashteer Project is an initiative designed to automate air defence control and reporting processes by digitising the entire process.
    • It is developed by Bharat Electronics Limited (BEL) as part of the ‘Atmanirbhar Bharat’ initiative.
    • It seeks to induct Akashteer Command and Control Systems
    • By integrating radar and communication systems at all levels into a unified network, ‘Akashteer’ aims to deliver an unprecedented level of situational awareness and control.
    • This will enable swift engagement of hostile targets, significantly reduce the risk of fratricide, and ensure the safety of friendly aircraft in contested airspace.

    How it will help India’s air defence system?

    The ‘Akashteer Command and Control Systems’ will significantly enhance India’s air defense capabilities in several ways:

    1. Efficiency and Integration: Digitizing Air Defence Control and Reporting processes with ‘Akashteer’ will improve efficiency and integration. This enables the Indian Army to respond swiftly to hostile threats while reducing the risk of friendly fire incidents.
    2. Situational Awareness: ‘Akashteer’ integrates radar and communication systems into a unified network, providing the Indian Army with better situational awareness. This enables them to detect and engage hostile targets more effectively, ensuring the safety of friendly aircraft in contested airspace.
    3. Mobility and Resilience: The system’s vehicle-based and mobile Control Centers are designed for operational capabilities even in challenging communication environments. This ensures that the Indian Army can operate effectively in diverse terrain and adverse conditions.
    4. Automation: Deployment of ‘Akashteer’ represents a move towards complete automation of air defense operations. This enhances the Indian Army’s ability to defend its airspace, ensuring a safer and more secure future for the country.

    PYQ:

    [2018] What is “Terminal High Altitude Area Defense (THAAD)”, sometimes seen in the news?

    (a) An Israeli radar system

    (b) India’s indigenous anti-missile programme

    (c) An American anti-missile system

    (d) A defence collaboration between Japan and South Korea

  • Govt. body hikes prices of essential medicines again, says ‘it’s minuscule’

    Why in the News? 

    Recently, the National Pharmaceutical Pricing Authority (NPPA) implemented a 0.00551% increase in the Maximum Retail Price (MRP) for scheduled formulations of drugs starting from the commencement of the fiscal year 2024–25.

    Context:

    • The Department of Pharmaceuticals has released its yearly update of revised ceiling prices for 923 scheduled drug formulations and adjusted retail prices for 65 formulations.
    • These revised ceiling rates took effect on April 1. The Central Government attributes the price adjustments to fluctuations in the Wholesale Price Index (WPI).

    What is the National List of Essential Medicines? 

    • As per the World Health Organisation (WHO), Essential Medicines are those that satisfy the priority healthcare needs of the population.
    • Ministry of Health and Family Welfare hence prepared and released the first National List of Essential Medicines of India in 1996 consisting of 279 medicines.
      • Currently, India has approximately 400 molecules and 960 formulations covered under the National List of Essential Medicines.
    • The prices of non-essential drugs are also monitored by the government to ensure that the manufacturers of these drugs don’t increase MRP by more than 10% annually.

    The issue of the present Current Price Increase:

    • Manufacturers are allowed to increase the Maximum Retail Price (MRP) of scheduled formulations based on the Wholesale Price Index (WPI) without prior government approval.
    • Pharmaceutical companies argue that a rational increase in the cost of drugs is necessary for quality control.
    • Government’s Stance on Current Hike: Despite the recent increase, the government suggests that it will only marginally impact the cost of essential drugs such as antibiotics and painkillers.
      • The National Pharmaceutical Pricing Authority (NPPA) follows the Drug Price Control Order (DPCO) of 2013, allowing price hikes in line with changes in the WPI index.
      • Medicine prices were raised by 12% last year and 10% in 2022.

    BACK2BASICS:

    1. National Pharmaceutical Pricing Authority (NPPA):

    The National Pharmaceutical Pricing Authority was set up as an attached office of the Department of Chemicals and Petrochemicals (now Department of Pharmaceuticals since July 2008) on 29th August 1997. It has been entrusted inter-alia, with the following functions

    • Enforce the provision: To implement and enforce the provisions of the Drugs Price Control Order (DPCO), 1995/2013 under the powers delegated to it and to undertake and/or sponsor relevant studies concerning the pricing of drugs/formulations.
    • Monitor Demand and supply: To monitor the availability of drugs, identify shortages, if any, and take remedial steps. To collect/maintain data on production, exports and imports, market share of individual companies, profitability of companies, etc. for bulk drugs and formulations.
    • Manage legal matters: To deal with all legal matters arising out of the decisions of the Authority. To render advice to the Central Government on changes/revisions in the drug policy.
    • Assist Government: To help the Central Government in the parliamentary matters relating to drug pricing.
    1. Drugs (Prices Control) Order (DPCO):
    • The Drugs Prices Control Order, issued by the Government of India under Section 3 of the Essential Commodities Act, 1955, aims to govern and regulate drug prices.
    • Provides the list of price-controlled drugs: The Order interalia provides the list of price-controlled drugs, procedures for fixation of prices of drugs, method of implementation of prices fixed by Govt., penalties for contravention of provisions, etc.
    • Regulate only listed drugs: According to the regulations outlined in DPCO 2013, the National Pharmaceutical Pricing Authority oversees and regulates only the prices of drugs listed in the National List of Essential Medicines (NLEM).

     

    Achievements of India’s Pharmaceutical Industry:

    • Advanced Industries: India boasts one of the most advanced pharmaceutical industries among developing nations, ranking third globally in terms of volume and 13th in terms of value.
    • Export Destinations: The United States serves as the largest export destination for bulk drugs from India. This is noteworthy considering the stringent regulatory standards in the US.
      • Other significant export destinations include Brazil, Bangladesh, Turkey, China, the Netherlands, Nigeria, Vietnam, and Egypt.
    • India’s Role as a Supplier for Global South (developing countries): India ranks among the top five suppliers of bulk drugs to several developing countries, including Bangladesh, Nigeria, Vietnam, Egypt, Iran, and Pakistan.
      • Despite China’s dominance as a larger supplier, India remains a substantial exporter in this regard.

    The challenge is Dependency on China: Despite India’s robust pharmaceutical sector, it heavily relies on China for the supply of bulk drugs and drug intermediates. Approximately two-thirds of India’s total imports in this category originate from China.

    Conclusion: The recent price increase by the NPPA aligns with fluctuations in the Wholesale Price Index, aiming to regulate drug costs. India’s pharmaceutical industry faces challenges of import dependency on China, despite its global presence.

    Mains PYQ

    Q What do you understand by Fixed Dose Drug Combinations (FDCs)? Discuss their merits and demerits. (UPSC IAS/2013)

  • NexCAR19: India’s First Indigenous CAR T- Cell Therapy for Cancer

    Why in the news?

    • President Droupadi Murmu has unveiled ‘NexCAR19’ India’s first indigenously-developed CAR T-cell therapy for cancer treatment.

    What is CAR-T Cell Therapy?

    What is it?
    • CAR-T cell therapy stands for Chimeric Antigen Receptor T cell therapy.
    • It is a type of cancer immunotherapy that uses the patient’s own T cells, genetically modified in a laboratory to enhance their ability to locate and destroy cancer cells.
    How does it work?
    • T cells are white blood cells responsible for identifying and fighting illness and infection.
    • Each T cell has a receptor that can recognize antigens (proteins or molecules recognized by the immune system).
    • Cancer cells may have antigens that the immune system does not recognize as abnormal, allowing cancer to evade the immune response.
    • CAR-T cells are genetically engineered in the lab to express a new receptor that can bind to cancer cells and effectively kill them.
    Therapy Process The process involves several steps, including:

    1. Collecting T Cells: Blood is drawn from the patient’s arm, and T cells are separated from the blood using an apheresis machine.

    2. Engineering T Cells: In a laboratory, the T cells are modified by adding a manufactured CAR, and they are allowed to multiply and grow.

    3. Infusing CAR-T Cells: Once enough CAR-T cells are prepared, they are injected back into the patient’s arm.

    • Chemotherapy may be recommended before CAR-T cell infusion to enhance treatment effectiveness.
    • The process can take place in an outpatient infusion center or a hospital setting.
    Cancers Treated
    • CAR-T cell therapy is effective against certain types of cancer, especially when other treatments are ineffective.
    • It is currently FDA-approved for treating haematological malignancies, including leukemia, lymphoma, and multiple myeloma.

     

    NexCAR19: India’s Indigenously Developed CAR-T Therapy

    • NexCAR19 is designed to target cancer cells carrying the CD19 protein, a marker on cancer cells, enhancing precision in treatment.
    • It has been developed jointly by IIT Bombay and the Tata Memorial Centre.
    • Initially approved for patients aged 15 and above with B-cell lymphomas who did not respond to standard treatments, leading to relapse or recurrence.

    Effectiveness and Unique Features

    • Approximately 70% of patients respond to NexCAR19 treatment, with some achieving complete remission.
    • Lab and animal studies indicate lower drug-related toxicities, including reduced neurotoxicity and Cytokine Release Syndrome (CRS).
    • Trials for paediatric patients are underway at Tata Memorial Hospital, ensuring broader applicability.

    Availability and Affordability

    • ImmunoACT is in the process of securing licenses and partnering with hospitals, including Tata Memorial, Nanavati, Fortis, and Jaslok, across multiple cities.
    • Initially priced at Rs 30-40 lakh, ImmunoACT aims to eventually reduce the cost to Rs 10-20 lakh, making the therapy more accessible.

    PYQ:

    2017:

    Stem cell therapy is gaining popularity in India to treat a wide variety of medical conditions including leukaemia, Thalassemia, damaged cornea and several burns. Describe briefly what stem cell therapy is and what advantages it has over other treatments?

     

    Practice MCQ:

    With reference to the CAR-T Cell Therapy, consider the following statements:

    1.    T cells are Red Blood Cells responsible for identifying and fighting illness and infection.

    2.    Each T cell has a receptor that can recognize antigens (proteins or molecules recognized by the immune system).

    Which of the given statements is/are correct?

    (a) Only 1

    (b) Only 2

    (c) Both 1 and 2

    (d) Neither 1 nor 2

  • India among countries mulling telescopes on, around the moon

    Why in the news? 

    Astronomers are looking forward to opening a new window on the universe by posting high-resolution telescopes on the moon and in orbit around it.

    Why Astronomers are looking forward to opening telescopes on the moon?

    • Radio telescopes launched into orbit around Earth exacerbated the problem of receiving radio noise from the entire planet, along with signals from outer space.
    • The moon’s far side offers pristine, airless conditions ideal for optical telescopes, providing crystal-clear seeing conditions during the two-week lunar night.

    Global Initiatives to Install Telescope on the Moon:

    • NASA’s LuSEE Night Project: LuSEE Night, a joint NASA-Berkeley Lab project scheduled for launch in December 2025, aims to study the Dark Ages period by landing on the far side of the moon, shielded from radio frequency noise from Earth.
    • ESA’s Projects: ESA is preparing to launch a radio telescope to the moon’s far side aboard its lunar lander, ‘Argonaut’, by 2030, along with other projects focused on gravitational wave detection and infrared observations.
    • China’s Initiatives: China is also actively involved in lunar exploration, with plans to launch a moon-orbiting radio telescope in 2026 and deploy the Queqiao-2 satellite, which includes a radio telescope payload, to serve as a communications relay between Earth and future missions.

    Indian Initiative 

    • PRATUSH: Indian scientists plan to deploy the radio telescope PRATUSH on the moon’s far side, built by the Raman Research Institute (RRI) in collaboration with the Indian Space Research Organisation (ISRO).
    • Deployment Process: Initially, ISRO will place PRATUSH into orbit around the Earth, then fine-tune it before launching it towards the moon. Operating in Earth orbit will offer advantages such as free space operation and reduced ionosphere impact compared to ground-based experiments.
    • Observational Advantages: PRATUSH in lunar orbit will have ideal observing conditions, operating in free space with minimal radio frequency interference (RFI) and no ionosphere, essential for studying the signal from the Dark Ages.
    • Instrument Features: PRATUSH will carry a wideband frequency-independent antenna, a self-calibrating analog receiver, and a digital correlator to capture radio noise in the signal from the Dark Ages.

    Conclusion: The global initiative to deploy telescopes on and around the moon aims to overcome Earth’s radio noise and capitalize on the lunar far side’s pristine conditions for groundbreaking astronomical observations, including studying the universe’s early Dark Ages.

    Mains question for practice 

    Q Discuss the global initiatives to deploy telescopes on the moon.

     

     

     

  • OptiDrop platform for studying Single Cells

    Why in the news?

    The Centre for Cellular and Molecular Platforms (C-CAMP) in Bengaluru has unveiled OptiDrop platform designed to simplify and significantly reduce the cost of studying single cells.

    About C-CAMP

    • C-CAMP Initiative was established in 2009 under the aegis of the Department of Biotechnology, Ministry of Science, Technology, and Earth Sciences.
    • It stands as India’s premier biosciences research and innovation hub.

    What is OptiDrop?

    • OptiDrop presents a cost-effective alternative to traditional flow cytometry methods, making single-cell analysis more accessible to a broader range of researchers and institutions.
    • OptiDrop simplifies single-cell analysis by encapsulating individual cells within droplets, facilitating easier manipulation and analysis compared to traditional methods.
    • Key features such as affordability, live data visualization, compact design, and closed-system architecture enhance its suitability for diverse clinical applications.
    Cytometry is the measurement of number and characteristics of cells. Variables that can be measured by cytometric methods include cell size, cell count, cell morphology (shape and structure), cell cycle phase, DNA content, and the existence or absence of specific proteins on the cell surface or in the cytoplasm.

    Applications of OptiDrop

    • Expansive Utility: OptiDrop unlocks various downstream applications, including drug screening, environmental monitoring, immunotherapy, and single-cell genomics, revolutionizing research across multiple domains.
    • Advanced Research Capabilities: Researchers can leverage OptiDrop to study individual cell behavior during drug screenings, identify and monitor environmental contaminants, sort specialized cell populations, and explore genetic heterogeneity within cell populations.

    Benefits offered by OptiDrop

    • Accessible Technology: Unlike conventional cytometers, which can cost up to Rs 40 lakh or more, OptiDrop offers a cost-efficient solution likely priced around Rs 10 lakh, making it accessible to a broader range of research labs and institutions.
    • Affordable Scalability: OptiDrop’s affordable pricing and scalable design allow institutions of varying sizes to adopt the technology, democratizing access to cutting-edge single-cell analysis capabilities.
    • Long-Term Sustainability: By reducing the barrier to entry for single-cell analysis, OptiDrop paves the way for sustainable and impactful research initiatives, driving innovation and discovery in the life sciences.

    PYQ:

    2020:

    Which of the following statements are correct regarding the general difference between plant and animal-calls?

    1.    Plant cells have cellulose cell walls whilst animal cells do not.

    2.    Plant cells do not have plasma membrane unlike animal cells which do.

    3.    Mature plant cell has one large vacuole whilst animal cell has many small vacuoles.

    Select the correct answer using the code given below:

    (a) 1 and 2 only

    (b) 2 and 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

     

    Practice MCQ:

    The OptiDrop equipment recently seen in news finds application in:

    (a) Cytometry

    (b) Astronomy

    (c) Geology

    (d) Radiometry

  • Mother of Dragons Comet: A Rare Celestial Phenomenon

    Why in the news?

    • The “Mother of Dragons” comet, officially named Comet 12P/Pons-Brooks, is making a rare appearance in the Northern Hemisphere skies.
    • This Halley-type comet, completing its orbit every 71 years, has emerged marking its first sighting since 1954.

    What is a Comet?

     

    • A comet is a celestial object composed primarily of ice, dust, and rocky particles that orbit the Sun in elongated, elliptical paths.
    • These icy bodies originate from the outer regions of the solar system, specifically from two regions: the Kuiper Belt and the Oort Cloud.
    • Comets are often referred to as “dirty snowballs” or “icy dirtballs” due to their composition.
    • Halley’s Comet is a short-period comet visible from Earth every 75–79 years.
    • It was last seen in Earth’s skies in 1986 and was met in space by an international fleet of spacecraft. It will return in 2061 on its regular journey around the Sun.

     

    About Mother of Dragons Comet

    • It is named by the European Space Agency (ESA).
    • The comet’s name is inspired by its link to the annual “kappa-Draconids” meteor shower, active from November 29 to December 13 each year.
    • It has a width of 17 km. the comet features an elliptical orbit adorned with a mysterious spiral of luminous light enveloping its icy nucleus.
    • It is comprised of ice, dust, rock, and diatomic carbon molecules.
    • It dissipates a radiant emerald hue when illuminated by the sun, captivating observers with its bright green appearance.

    Display Features of the Comet

    • Renowned for its cryovolcanic eruptions, the comet periodically ejects material from its icy core into space, resulting in breath-taking luminosity.
    • Its most recent eruption in July 2023, after 69 years, earned it the moniker “devil comet” due to its dramatic outburst, resembling horns likely caused by internal features.

    PYQ:

    2014:

    What is a coma, in the content of astronomy?

    (a) Bright half of material on the comet

    (b) Long tail of dust

    (c) Two asteroids orbiting each other

    (d) Two planets orbiting each other

     

    Practice MCQ:

    With reference to the “Mother of Dragons” Comet, consider the following statements:

    1.    It is named by the NASA.

    2.    It is comprised of ice, dust, rock, and diatomic carbon molecules.

    3.    It makes appearances after every 10 years.

    How many of the above statements is/are correct?

    (a) One

    (b) Two

    (c) Three

    (d) None

  • Nuclear Fusion: KSTAR reaches a temperature of 100 million Celsius

    Why in the news?

    • South Korean scientists at the Korea Institute of Fusion Energy (KFE) achieved a significant milestone by producing temperatures of 100 million Celsius for 48 seconds in the Korea Superconducting Tokamak Advanced Research (KSTAR) fusion reactor.
    • KSTAR maintained the high confinement mode (H-mode) for over 100 seconds, demonstrating stability in plasma conditions crucial for sustained fusion reactions.
    • This is a world record.

    What is Tokamak Technology?

     

    • Scientists utilize a tokamak, a donut-shaped reactor, to heat hydrogen variants to extreme temperatures, creating plasma.
    • This reactor replicates the Sun’s fusion reaction, generating immense heat energy.

     

    What is Nuclear Fusion?

    • Nuclear fusion involves fusion of hydrogen and other light elements to release massive energy, akin to the process that powers the Sun and stars.
    • It is a process where two light atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process.
    • This occurs under extremely high temperatures, typically in the range of tens of millions of degrees Celsius, and pressure, similar to those found in the core of stars.
    • In a tokamak reactor, hydrogen variants are heated to extreme temperatures to create a plasma, mimicking conditions found in the Sun’s core.
    • 1 kg of fusion fuel contains about 10 million times as much energy as a kg of coal, oil or gas.

    Significance of KSTAR’s achievements

    • Achieving sustained fusion reactions in laboratory conditions unlocks the potential for unlimited, zero-carbon electricity generation.
    • By extending the duration of high-temperature fusion, scientists aim to sustain plasma temperatures of 100 million degrees for 300 seconds by 2026, pushing the boundaries of fusion research.
    • Progress in fusion research at KSTAR contributes to international efforts, supporting projects like the International Thermonuclear Experimental Reactor (ITER) in France.

    ITER Project

     

    • ITER is a unique partnership of nations jointly responsible for the construction, operation, and decommissioning of an experimental fusion facility.
    • It was founded in 2007 and is based at Saint-Paul-lez-Durance, France.
    • ITER being an experimental reactor, it will allow the study of fusion reaction which governs the Sun and other Stars.
    • Nuclear fusion will take place in the form of Plasma in a Tokamak.

    ITER is run, funded and designed by 7 members:

    1. European Union (EU)
    2. India
    3. China
    4. Japan
    5. Russia
    6. South Korea
    7. United States

    Benefits offered by Nuclear Fusion Energy

    • Clean Energy: Fusion reactions produce minimal radioactive waste compared to nuclear fission, which generates long-lived radioactive waste. Fusion also emits no greenhouse gases, making it an environmentally friendly energy source.
    • Safety and Controlled Nature: Fusion reactions are inherently safer than nuclear fission reactions. Fusion reactors have a lower risk of accidents and do not produce runaway chain reactions like fission reactors.
    • Energy Security: Fusion provides a reliable and secure source of energy, reducing dependence on fossil fuels and volatile energy markets. It offers a sustainable solution to meet global energy demand.
    • High Energy Density: Fusion reactions release a vast amount of energy compared to other energy sources. This high energy density makes fusion power compact and efficient, enabling it to meet large-scale energy needs.
    • Scalability: Fusion reactors can be designed to scale up or down to meet varying energy demands. They can serve as base-load power plants or complement renewable energy sources, providing flexibility in the energy mix.
    • Minimal Environmental Impact: Fusion power plants have a small footprint and do not require large mining operations or fuel transportation, reducing their environmental impact. They also produce no air pollution or carbon emissions during operation.

    PYQ:

    2016:

    India is an important member of the ‘International Thermonuclear Experimental Reactor’. If this experiment succeeds, what is the immediate advantage for India?

    (a) It can use thorium in place of uranium for power generation

    (b) It can attain a global role in satellite navigation

    (c) It can drastically improve the efficiency of its fission reactors in power generation

    (d) It can build fusion reactors for power generation

     

    Practice MCQ:

    The Korea Superconducting Tokamak Advanced Research (KSTAR) fusion reactor has recently set a world record. In this regard, consider the following statements:

    1.    It produced a temperatures of 100 million Celsius for 48 seconds.

    2.    It achieved sustained fusion reactions in laboratory conditions.

    Which of the given statements is/are correct?

    (a) Only 1

    (b) Only 2

    (c) Both 1 and 2

    (d) Neither 1 nor 2

  • 125 years of Kodaikanal Solar Observatory

    Why in the news?

    This year marks 125th Year of the Kodaikanal Solar Observatory (KoSO).

    About Kodaikanal Solar Observatory (KoSO)

    • The idea for an Indian solar observatory emerged in the late 19th century, with then government sanctioning the establishment of the Solar Physics Observatory in Kodaikanal in August 1893.
    • Kodaikanal in the Palani hills of Tamil Nadu was chosen as the site for the observatory due to its favorable atmospheric conditions, following surveys conducted by Charles Michie Smith.
    • The foundation stone for KoSO was laid by Lord Wenlock, the then Governor of Madras, in 1895.
    • Systematic observations at KoSO began on March 14, 1901.
    • KoSO initially housed instruments for solar observations, including telescopes for examining sunspots, prominences, and solar radiations.
    • Presently, KoSO houses advanced instruments like the H-alpha telescope and the White light Active Region Monitor (WARM) for high-resolution solar imaging.

    Do you know?

    • The Bhavnagar Telescope, named after the Maharaja of Bhavnagar, was one of the more famous instruments at KoSO during the early decades of its operation.
    • A 15cm telescope was used to capture solar images onto a photographic film or plate.
    • Solar magnetic plages and prominences were recorded since 1911, taken on photographic films and plates.

    Historical Perspective

    • Ancient Legacy: Throughout history, seafarers, mathematicians, astronomers, and physicists have meticulously studied the Sun and its celestial phenomena.
    • British Era Initiatives: In 1792, the British East India Company established the pioneering Madras Observatory, marking a significant milestone in astronomical research in the region.
    • Madras Observatory’s Legacy: The Madras Observatory documented crucial astronomical observations during 1812-1825, laying the groundwork for solar research in India.
    • Shift to Systematic Observations: Dedicated solar observations commenced in 1878, fostering a deeper understanding of solar phenomena.
    • Advancements in Methodology: The adoption of systematic observational techniques paved the way for more comprehensive and detailed studies of the Sun’s behavior.

    Need for such Observatory

    • Great Drought of 1875-1877: This event triggered by scanty rainfall, propelled the need for comprehensive solar studies to comprehend its implications on weather patterns.
    • India’s Geographical Significance: India’s drought was part of a larger global phenomenon, affecting several countries and leading to widespread famine.
    • Scientific Inquiry: Scientists recognized the potential role of solar variability in influencing climatic patterns, prompting inquiries into the Sun’s behavior and its correlation with environmental phenomena.

    Scientific Endeavors of KoSO

    • The observatory made significant contributions to solar physics, including the discovery of the radial motion of sunspots, known as the Evershed Effect.
    • Over time, KoSO expanded its research areas beyond solar physics to include cosmic rays, radio astronomy, ionospheric physics, and stellar physics.
    • In April 1971, KoSO was brought under the Indian Institute of Astrophysics (IIA), Bengaluru, as part of the separation of astrophysics from the India Meteorological Department (IMD).

    Repository of the KoSO

    • Between 1904 and 2017, all solar observations were traced onto photographic films and plates
    • A new telescope mounted with CCD cameras has taken over and, since 2017, continued to observe the Sun.
    • Digitization of the records was initiated in 1984 by Prof J C Bhattacharyya, and others continued the effort.
    • KoSO is now home to a digital repository of a whopping 1.48 lakh solar images adding up to 10 terabyte of data.
    • These include 33,500 white-light images (showing sunspots), 45,000 images of the Ca II K spectral line (which reveals plages), and 70,000 H-alpha photographic plates that show prominences.

    PYQ:

    2019:

    On 21st June, the Sun-

    (a) does not set below the horizon at the Arctic Circle

    (b) does not set below the horizon at Antarctic Circle

    (c) shines vertically overhead at noon on the Equator

    (d) shines vertically overhead at the Tropic of Capricorn

     

    Practice MCQ:

    Which of the following statements correctly describes the ‘Evershed Effect’ in Sun?

    (a) It refers to the bending of light waves around obstacles, demonstrated by the diffraction pattern observed in a single-slit experiment.

    (b) It is the phenomenon of a magnetic field being generated by the motion of charged particles in the convective zone of the Sun.

    (c) It describes the deflection of moving charged particles, such as electrons, in a magnetic field, leading to the creation of an electric potential difference.

    (d) It is the radial flow of gases in the Sun’s outer atmosphere, observed as a redshift in the spectrum of light emitted by the photosphere.

  • Ozone found on Jupiter’s moon Callisto

    Why in the news?

    PRL Ahmedabad researchers has uncovered evidence of ozone presence on Jupiter’s moon Callisto, offering profound insights into celestial chemical processes.

    About Jupiter and its Moons

    Description
    Discovery Known since ancient times;

    Galileo Galilei observed Jupiter and its moons through a telescope in 1610
    Composition Mostly composed of hydrogen and helium, with traces of other gases such as ammonia, methane, and water vapor
    Diameter 139,822 kilometers
    Mass 1.898 × 10^27 kilograms (317.8 Earth masses)
    Orbital Period Approximately 11.86 Earth years
    Average Distance from Sun Approximately 778 million kilometers
    Surface Temperature Approximately -145°C (-234°F)
    Magnetic Field Strong magnetic field, the strongest in the solar system
    Moons Jupiter has 79 known moons, including the four largest Galilean moons: Io, Europa, Ganymede, and Callisto.

    Other notable moons include Amalthea, Himalia, Elara, Leda, Thebe, Metis, Adrastea, and more.

    The moons vary significantly in size, composition, and orbital characteristics.
    Great Red Spot Enormous storm system, known to exist for at least 400 years
    Exploration Explored by spacecraft such as Pioneer, Voyager, Galileo, Juno, and more

    Callisto and its Unique Environment

    • Composition: Callisto’s predominantly icy surface, interspersed with rocky materials, sulphur dioxide, and organic compounds, positions it as a compelling candidate for extraterrestrial life exploration.
    • Geological Stability: Despite extensive cratering, Callisto’s surface exhibits geological inactivity, suggesting long-term stability conducive to preserving subsurface oceans or potential habitats.

    Significance of Ozone Findings

    • Life-Sustaining Component: Ozone, a molecule composed of three oxygen atoms, plays a vital role in shielding celestial bodies from harmful ultraviolet radiation, fostering conditions conducive to life.
    • Earthly Parallel: Just as the Earth’s ozone layer protects against harmful UV radiation, the presence of ozone on Callisto hints at stable atmospheric conditions and potential habitability, sparking scientific intrigue.

    PYQ:

    What is the difference between asteroids and comets?

    1.    Asteroids are small rocky planetoids, while comets are made of ice, dust and rocky material.

    2.    Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury.

    3.    Comets show a perceptible glowing tail, while asteroids do not.

    Which of the statements given above is/ are correct? (2011)

    (a) 1 and 2 only

    (b) 1 and 3 only

    (c) 3 only

    (d) 1, 2 and 3