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Type: Prelims Only

  • International Space Agencies – Missions and Discoveries

    Mars ‘Opposition’ Event

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

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Opposition event

    Mains level: Not Much

    Due to an event referred to as “opposition”, which takes place every two years and two months, Mars will shine the brightest.

    Try this question from CSP 2017:

    Q.Which region of Mars has a densely packed river deposit indicating this planet had water 3.5 billion years ago?

    (a) Aeolis Dorsa (b) Tharsis (c) Olympus Mons (d) Hellas

    What is the Opposition Event?

    • ‘Opposition’ is the event when the sun, Earth and an outer planet (Mars in this case) are lined up, with the Earth in the middle.
    • The time of opposition is the point when the outer planet is typically also at its closest distance to the Earth for a given year, and because it is close, the planet appears brighter in the sky.
    • An opposition can occur anywhere along Mars’ orbit, but when it happens when the planet is also closest to the sun, it is also particularly close to the Earth.
    • It will outshine Jupiter, becoming the third brightest object (moon and Venus are first and second, respectively) in the night sky during the month of October.

    When does opposition happen?

    • Earth and Mars orbit the sun at different distances (Mars is farther apart from the sun than Earth and therefore takes longer to complete one lap around the sun).
    • In fact, the opposition can happen only for planets that are farther away from the sun than the Earth.
    • In the case of Mars, roughly every two years, the Earth passes between sun and Mars, this is when the three are arranged in a straight line.
    • Further, as the Earth and Mars orbit the sun, there comes a point when they are on the opposite sides of it, and hence very far apart. At its farthest, Mars is about 400 million km from the Earth.
    • In case of opposition, however, Mars and Sun are on directly opposite sides of the Earth. In other words, the Earth, sun and Mars all lie in a straight line, with the Earth in the middle.

    Logic behind the name

    • As per NASA, from an individual’s perspective on the Earth, Mars rises in the east and after staying up all night, it sets in the west just as the sun rises in the east and sets in the west.
    • Because from the perspective on Earth, the sun and Mars appear to be on the opposite sides of the sky, Mars is said to be in “opposition”.
    • Essentially, the opposition is a reference to “opposing the sun” in the sky.

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  • Digital India Initiatives

    National Supercomputing Mission (NSM)

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: NSM, Supercomputing

    Mains level: National Supercomputing Mission

    The Centre for Development of Advanced Computing (C-DAC) has launched the second phase of the ambitious National Supercomputing Mission (NSM).

    Tap to read more about National Supercomputing Mission (NSM):

    [pib] National Supercomputing Mission (NSM)

    National Supercomputing Mission (NSM)

    • NSM is a proposed plan by GoI to create a cluster of seventy supercomputers connecting various academic and research institutions across India.
    • In April 2015 the government approved the NSM with a total outlay of Rs.4500 crore for a period of 7 years.
    • The mission was set up to provide the country with supercomputing infrastructure to meet the increased computational demands of academia, researchers, MSMEs, and startups by creating the capability design, manufacturing, of supercomputers indigenously in India.
    • Currently, there are four supercomputers from India in the Top 500 list of supercomputers in the world.

    Aims and objectives

    • The target of the mission was set to establish a network of supercomputers ranging from a few Tera Flops (TF) to Hundreds of Tera Flops (TF) and three systems with greater than or equal to 3 Peta Flops (PF) in academic and research institutions of National importance across the country by 2022.
    • This network of Supercomputers envisaging a total of 15-20 PF was approved in 2015 and was later revised to a total of 45 PF (45000 TFs), a jump of 6 times more compute power within the same cost and capable of solving large and complex computational problems.

    What is a Supercomputer?

    • A supercomputer is a computer with a high level of performance as compared to a general-purpose computer.
    • The performance of a supercomputer is commonly measured in floating-point operations per second (FLOPS) instead of million instructions per second (MIPS).
    • Since 2017, there are supercomputers which can perform over a hundred quadrillion FLOPS (petaFLOPS).
    • Since November 2017, all of the world’s fastest 500 supercomputers run Linux-based operating systems.

    Why do we need supercomputers?

    • Tackle problems: Developed and almost-developed countries have begun ensuring high investments in supercomputers to boost their economies and tackle new social problems.
    • These high-performance computers can simulate the real world, by processing massive amounts of data, making cars and planes safer, and more fuel-efficient and environment-friendly.
    • They also aid in the extraction of new sources of oil and gas, development of alternative energy sources, and advancement in medical sciences.
    • Disaster Management: Supercomputers have also helped weather forecasters to accurately predict severe storms, enable better mitigation planning and warning systems.
    • They are also used by financial services, manufacturing and internet companies and infrastructure systems like water-supply networks, energy grids, and transportation.
    • Future applications of artificial intelligence (AI) also depend on supercomputing.
    • Due to the potential of this technology, countries like the US, China, France, Germany, Japan, and Russia have created national-level supercomputing strategies and are investing substantially in these programmes.

    When did India initiate its efforts to build supercomputers?

    • India’s supercomputer programme initiated in the late 1980s, when the United States ceased the export of a Cray Supercomputer due to technology embargos.
    • This resulted in India setting up C-DAC in 1988, which in 1991, unveiled the prototype of PARAM 800, benchmarked at 5 Gflops. This supercomputer was the second-fastest in the world at that time.
    • Since June 2018, the USA’s Summit is the fastest supercomputer in the world, taking away this position from China.
    • As of January 2018, Pratyush and Mihir are the fastest supercomputers in India with a maximum speed of Peta Flops.

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  • Indian Ocean Power Competition

    Greater Male Connectivity Project (GMCP)

    Prelims Only | International Relations | Mains Paper 2: Bilateral, Regional and Global Groupings and agreements involving India

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Greater Male Connectivity Project

    Mains level: India-Maldives Relations

    Following up on India’s announcement of a $500 million package to the Maldives, the Exim Bank of India and the Maldives’s Ministry of Finance signed an agreement for $400 million in Male.

    Try this question from 2014:

    Q.Which one of the following pairs of islands is separated from each other by the ‘Ten Degree Channel’?

    (a) Andaman and Nicobar

    (b) Nicobar and Sumatra

    (c) Maldives and Lakshadweep

    (d) Sumatra and Java

    Greater Male Connectivity Project

    • The GMCP consists of a number of bridges and causeways to connect Male to Villingili, Thilafushi and Gulhifahu islands that span 6.7 km.
    • It would ease much of the pressure of the main capital island of Male for commercial and residential purposes.
    • When completed, the project would render the Chinese built Sinamale Friendship bridge connecting Male to two other islands, thus far the most visible infrastructure project in the islands.
    • At present, India-assisted projects in the region include water and sewerage projects on 34 islands, reclamation project for the Addl island, a port on Gulhifalhu, airport redevelopment at Hanimadhoo, and a hospital and a cricket stadium in Hulhumale.

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  • ISRO Missions and Discoveries

    Indian Sat: Another satellite made by students

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Femto Satellites, Micro-gravity

    Mains level: Not Much

    An experimental satellite developed by three students of Karur (TN) has been selected for launch in sub-orbital space by NASA.

    Try this PYQ:

    Q.The term ‘IndARC’, sometimes seen in the news, is the name of:

    (a) An indigenously developed radar system inducted into Indian Defence

    (b) India’s satellite to provide services to the countries of Indian Ocean Rim

    (c) A scientific establishment set up by India in Antarctic region

    (d) India’s underwater observatory to scientifically study the Arctic region

    Indian Sat

    • The Indian Sat is made of reinforced graphene polymer. It is 3 cm in size and weighs 64 gm.
    • It has its own radio frequency communication to transmit and receive a signal from earth to outer space. The solar cells attached to the satellite generate power for it.
    • The photographic film will absorb and measure the cosmic radiation inside the rocket.
    • It would study the effect of reinforced graphene polymers in microgravity. It would be in sub-orbital space flight for a few minutes before landing in the ocean.

    What is micro-gravity?

    • The term micro-g environment is more or less synonymous with the terms weightlessness and zero-g, but with an emphasis on the fact that g-forces are never exactly zero—it is just very small.
    • On the ISS, for example, the small g-forces come from tidal effects, gravity from objects other than the Earth, such as astronauts, the spacecraft, and the Sun, and, occasionally, air resistance.

    Back2Basics: Femto-satellites

    • Femto-satellites are satellites with a mass lower than 100 grams.
    • These new categories of satellites are, by concept, low cost devices if they are based on Commercial-of-the-Shelf (COTS) components.
    • Some examples of applications are related to low-cost missions with a short time of development.

     Kalamsat

    • Kalamsat was a communication satellite with a life span of two months launched in 2017.
    • The nanosatellite is a 10cm cube weighing 1.2 kg.
    • It will be the first to use the rocket’s fourth stage as an orbital platform.
    • The fourth stage will be moved to higher circular orbit so as to establish an orbital platform for carrying out experiments.
    • It is named after former Indian president Dr APJ Abdul Kalam and was built by an Indian high school student team, led by Rifath Sharook, an 18-year-old from the Tamil Nadu town of Pallapatti.
    • It is the world’s lightest and first-ever 3D-printed satellite.

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  • Innovations in Biotechnology and Medical Sciences

    FELUDA test for Covid-19

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

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: FELUDA, CAS9, CRISPR

    Mains level: CRISPR technology

    Union Health Ministry will soon roll out the FELUDA paper strip test for SARS-CoV-2 diagnosis.

    Try this PYQ:

    Q.What is Cas9 protein that is often mentioned in news?

    (a) A molecular scissors used in targeted gene editing

    (b) A biosensor used in the accurate detection of pathogens in patients

    (c) A gene that makes plants pest-resistant

    (d) A herbicidal substance synthesized in genetically modified crops

    FELUDA test

    • FELUDA is the acronym for FNCAS9 Editor Linked Uniform Detection Assay.
    • It uses indigenously developed CRISPR gene-editing technology to identify and target the genetic material of SARS-CoV2, the virus that causes Covid-19.
    • According to CSIR, the test matches accuracy levels of RT-PCR tests, considered the gold standard in the diagnosis of Covid-19, has a quicker turnaround time and requires less expensive equipment.
    • It is also the world’s first diagnostic test to deploy a specially adapted Cas9 protein to successfully detect the virus.

    How does it work?

    • The Feluda test is similar to a pregnancy test strip that will just change colour upon detection of the virus and can be used in a simple pathological lab.
    • The Cas9 protein is bar-coded to interact with the SARS-CoV2 sequence in the patient’s genetic material.
    • The Cas9-SARS-CoV2 complex is then put on the paper strip, where using two lines (one control, one test) makes it possible to determine if the test sample was infected.

    Back2Basics: CRISPR technology

    • CRISPR is a short form for Clustered Regularly Interspaced Short Palindromic Repeats.
    • It is a gene-editing technology and finds its use in correcting genetic defects and treating and preventing the spread of diseases.
    • The technology can detect specific sequences of DNA within a gene and uses an enzyme functioning as molecular scissors to snip it.
    • It also allows researchers to easily alter DNA sequences and modify gene function.
    • Moreover, the technology can also be configured for detection of multiple other pathogens in the future.

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  • Coastal Zones Management and Regulations

    8 Indian beaches accorded ‘Blue Flag’ tag

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

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Blue Flag Beaches

    Mains level: Not Much

    Eight Indian beaches have got an International Blue Flag Certification, said Union Minister of Environment, Forest and Climate Change.

    Note the beaches and their respective states. They can be asked in the ”match the pairs” type questions.

    Citation needed: *As of now, there are 13 Blue flag awarded beaches in India a/c to wikipedia. But Blue Flag website would provide exact figures (which yet to update the official numbers).

    Which are these beaches?

    1. Shivrajpur (Dwarka-Gujarat)
    2. Ghoghla (Diu)
    3. Kasarkod [NOT Kasargod which is in Kerala] and Padubidri (Karnataka)
    4. Kappad (Kerala)
    5. Rushikonda (AP)
    6. Golden Beach (Odisha) and
    7. Radhanagar (A&N Islands)

    Blue Flag Beaches

    • The ‘Blue Flag’ beach is an ‘eco-tourism model’ and marks out beaches as providing tourists and beachgoers clean and hygienic bathing water, facilities/amenities, a safe and healthy environment, and sustainable development of the area.
    • The certification is accorded by the Denmark-based Foundation for Environment Education.
    • It started in France in 1985 and has been implemented in Europe since 1987, and in areas outside Europe since 2001 when South Africa joined.
    • It has 33 stringent criteria under four major heads for the beaches, that is, (i) Environmental Education and Information (ii) Bathing Water Quality (iii) Environment Management and Conservation and (iv) Safety and Services.

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  • Tourism Sector

    Skal International Asia Area (SIAA)

    Prelims Only | Economics | Mains Paper 3:

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Skal International Asia Area (SIAA)

    Mains level: NA

    The UT of Jammu and Kashmir has won the bid to host the 50th annual Skal International Asia Area (SIAA) Congress in 2021 during the annual general meeting recently against four other cities.

    Note: Skal International is not an affiliate of the United Nations. This is where a prelims  question can pull a nerve.

    Skal International

    • Skal International is a professional organization of tourism leaders around the world, promoting global tourism and friendship.
    • It is a Spain-based tourism body with 15,000 members and 150 chapters across the world.
    • The word Skal comes from Scandinavia and has a long tradition. The “Skal” is a bowl containing a welcome drink that is offered to visitors when entering a home.
    • Its members, the industry’s managers and executives meet at local, national, regional and international levels to discuss and pursue topics of common interest.
    • It is the only international group uniting all branches of the travel and tourism industry.

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  • Gravitational Wave Observations

    What is Raychaudhuri Equation?

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

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Raychaudhuri Equation

    Mains level: Not Much

    The Raychaudhuri Equation in General Relativity, derived by Raychaudhuri is in the spotlight after 2020 Physics Nobel was awarded to Penrose for throwing light on Black Holes.

    Try this MCQ:

    Q.The Raychaudhuri Equation is sometimes seen in news is related to:

    Artificial Intelligence/Cloud Computing/Quantum Mechanics/Space Sciences

    What is Raychaudhuri Equation?

    • Raychaudhuri (1923–2005) was an Indian physicist, known for his research in general relativity and cosmology.
    • In general relativity, the Raychaudhuri equation is a fundamental result describing the motion of nearby bits of matter.
    • It was discovered independently by the Indian physicist Amal Kumar Raychaudhuri and the Soviet physicist Lev Landau.
    • The equation offers a simple and general validation of our intuitive expectation that gravitation should be a universal attractive force between any two bits of mass-energy in general relativity, as it is in Newton’s theory of gravitation.

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  • Indian Missile Program Updates

    Anti Radiation Missile: RudraM-I

    Prelims Only | Security Issues | Mains Paper 3: Indigenization Of Technology

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: RudraM-I

    Mains level: India's missile arsenal

    A New Generation Anti Radiation Missile (NGARM), RudraM-I, was successfully flight-tested by the Defence Research and Development Organisation (DRDO).

    Try this MCQ:

    Q.The RudraM-I recently seen in news is an:

    Ans: Anti-satellite missile/ Anti-radiation Missile/ Anti-tank mine/ Submarine Torpedo

    RudraM-I

    • RudraM-I is an anti-radiation missile can locate and target any radiation-emitting source like enemy radars, communication sites and other Radio Frequency (RF) emitting targets.
    • It is being developed by Defence Research Development Laboratory (DRDL), Hyderabad, as the nodal agency.
    • It is a joint effort involving several DRDO labs, the IAF, the Hindustan Aeronautics Limited (HAL) and several public and private sector enterprises.
    • This is the first indigenous anti-radiation missile of the country. It has a range of up to 200 km depending upon the launch conditions.
    • It can be launched from altitudes of 500 m to 15 km and speeds of 0.6 to 2 mach.
    • It can play a key role in neutralizing any jamming platforms of the enemy or take out radar stations thereby clearing a path for own fighters to carry out an offensive and also prevent own systems from being jammed.

    How does it work?

    • Anti-radiation missiles are designed to detect, track and neutralize the adversary’s radar, communication assets and other radio frequency sources, which are generally part of their air defence systems.
    • Such a missile’s navigation mechanism comprises an inertial navigation system — a computerised mechanism that uses changes in the object’s own position — coupled with GPS, which is satellite-based.
    • For guidance, it has a “passive homing head” — a system that can detect, classify and engage targets (radio frequency sources in this case) over a wide band of frequencies as programmed.
    • Once the RudraM missile locks on the target, it is capable of striking accurately even if the radiation source switches off in between.

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  • Nobel and other Prizes

    What is World Food Programme?

    Prelims Only | Trivia | Mains Paper 1: Population & Associated Issues

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: World Food Programme

    Mains level: Not Much

    The Nobel Peace Prize was awarded to the World Food Programme (WFP) for feeding millions of people from Yemen to North Korea, with the coronavirus pandemic seen pushing millions more into hunger.

    Tap here to read more about Nobel Prizes here at:

    Nobel and other Prizes

    World Food Programme

    • The WFP is the food-assistance branch of the United Nations and the world’s largest humanitarian organization focused on hunger and food security.
    • Founded in 1961, it is headquartered in Rome and has offices in 80 countries.
    • In addition to emergency food aid, WFP focuses on relief and rehabilitation, development aid, and special operations, such as making food systems more resilient against climate change and political instability.
    • It is an executive member of the United Nations Development Group, which collectively aims to fulfil the 17 Sustainable Development Goals (SDG), and has prioritized achieving SDG 2 for “zero hunger” by 2030.

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