DAILY CURRENT AFFAIRS IAS | UPSC Prelims and Mains Exam – 1st December 2023
Archives (PRELIMS & MAINS Focus) HH 1177 system Syllabus Prelims – SPACE Context: Recently, for the first time, astronomers have glimpsed a young star HH 1177 system outside the Milky Way galaxy. Background:- Newborn stars with these circumstellar disks had been observed by astronomers only in our Milky Way galaxy – until now About HH 1177 system:- HH 1177 is a massive star, with a rotating disk that was spotted in the Large Magellanic Cloud, a neighbouring dwarf galaxy that’s about 160,000 light-years away. ( Map of Milky Way |) A colossal star such as HH 1177 lives fast and dies young, forming more quickly and only having a life span that’s a fraction of that of a star like our sun. This shortened timeline makes the early stages of a massive star hard to observe in our galaxy, as both the star and its disk are hidden from view by the dusty material from which it forms. HH 1177 is within a stellar nursery, called N180, that has less dust and lower metal abundance. The star isn’t obscured by a cocoon of gas and dust. A newborn star grows in size by pulling in matter from its surroundings. The gas and dust accumulate in a flat disk around the star, known as an accretion disk, as a result of strong gravitational forces. The spinning disk transports the matter onto the star, which gets increasingly larger. The greater the star’s mass, the more powerful its gravitational field becomes, thereby pulling more gas and dust into the disk. MUST READ: Dark galaxy SOURCE: CNN PREVIOUS YEAR QUESTIONS Q1. Which one of the following countries has its own Satellite Navigation System? (2023) Australia Canada Israel Japan Q2. Consider the following statements: (2023) Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile. Which of the statements given above is/are correct? 1 only 2 only Both 1 and 2 Neither 1 nor 2 Rheumatoid arthritis Syllabus Prelims –SCIENCE AND TECHNOLOGY-HEALTH Context: Recent studies show cases of rheumatoid arthritis in young adults. Background:- According to health experts, youngsters with RA may find themselves navigating a world of chronic pain, fatigue and limited physical abilities. About Rheumatoid arthritis:- IMAGE SOURCE: CreakyJoints Rheumatoid arthritis is a chronic inflammatory disorder. It is an autoimmune disorder, which occurs when the immune system mistakenly attacks its own body’s tissues. Causes:- In a healthy person, the immune system fights invaders, such as bacteria and viruses. But with an autoimmune disease like RA, the immune system mistakes the body’s cells for foreign invaders and releases inflammatory chemicals that attack those cells. Unlike the wear-and-tear damage of osteoarthritis, rheumatoid arthritis affects the lining of joints, causing a painful swelling that can eventually result in bone erosion and joint deformity. Symptoms:- Tender, warm, swollen joints. Joint stiffness that is usually worse in the mornings and after inactivity. Fatigue Fever Loss of appetite. Risk factors:- Sex: Women are more likely than men to develop rheumatoid arthritis. Age: Rheumatoid arthritis can occur at any age, but it most commonly begins in middle age. ( National Centres for Disease Control (NCDC)) Family history: If a member of your family has rheumatoid arthritis, you may have an increased risk of the disease. Smoking Treatment:- Exercise Medication Surgery MUST READ: Disease Surveillance System SOURCE: HINDUSTAN TIMES PREVIOUS YEAR QUESTIONS Q.1) Consider the following: (2022) Aarogya Setu COWIN DigiLocker DIKSHA Which of the above are built on top of open-source digital platforms? 1 and 2 only 2, 3 and 4 only 1, 3 and 4 only 1, 2, 3 and 4 Q.2) In the context of vaccines manufactured to prevent the COVID-19 pandemic, consider the following statements: (2022) The Serum Institute of India produced a COVID-19 vaccine named Covishield using an mRNA platform. The Sputnik V vaccine is manufactured using a vector-based platform. COVAXIN is an inactivated pathogen-based vaccine. Which of the statements given above is correct? 1 and 2 only 2 and 3 only 1 and 3 only 1, 2 and 3 Air pollution Syllabus Prelims –ENVIRONMENT AND ECOLOGY/ GEOGRAPHY Context: Recent studies show that Air pollution causes over 2 million deaths annually in India. Background:- The research found that air pollution from using fossil fuels in industry, power generation, and transportation accounts for 5.1 million extra deaths a year worldwide. About Air pollution:- Air pollution is the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or materials. (Delhi and Air Pollution) Different types of air pollutants include– Gases: such as ammonia, carbon monoxide, sulphur dioxide, nitrous oxides, methane, carbon dioxide and chlorofluorocarbons. Particulates: both organic and inorganic. Biological molecules. Air pollution may cause diseases, allergies, and even death to humans. Additionally, it may hurt other living things like animals and food crops, as well as impair the built environment or the natural environment (for instance, by causing climate change, ozone depletion, or habitat destruction) (for example, acid rain). Harmful Impacts of Air Pollution:- It may cause diseases, allergies and even death in humans. It can cause harm to other living organisms such as animals and food crops. Can lead to climate change and may damage the natural environment Ozone depletion or habitat degradation Built hazardous environments (for example, acid rain). MUST READ: National Clean Air Campaign SOURCE: THE HINDU PREVIOUS YEAR QUESTIONS Q.1) Which one of the following has been constituted under the Environment (Protection) Act, 1986? (2022) Central Water Commission Central Ground Water Board Central Ground Water Authority National Water Development Agency Q.2) The “Common Carbon Metric” supported by UNEP, has been developed for (2021) Assessing the carbon footprint of building operations around the world Enabling commercial farming entities around the world to enter carbon emission trading Enabling governments to assess the overall carbon footprint caused by their countries Assessing the
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