DAILY CURRENT AFFAIRS IAS | UPSC Prelims and Mains Exam – 13th February 2024
Archives (PRELIMS & MAINS Focus) StarLink Syllabus Prelims and Mains – Science Context: Russia on Monday rejected Ukraine’s claim that Russian troops fighting on the frontline were using Starlink terminals. Background:- The Kremlin said on Monday that Elon Musk’s Starlink satellite internet system was neither certified for use in, nor officially supplied to, Russia, and therefore could not be used.Ukraine, which has used Starlink for military communications throughout its conflict with Russia, said on Sunday that Russian troops were using Starlink in parts of Ukraine they control. About Starlink:- Starlink is a satellite constellation that comprises thousands of small satellites in low-Earth orbit (LEO). SpaceX first began sending them into space in 2019. SpaceX is an American aerospace manufacturer and space transport services company founded by Elon Musk. Currently, there are more than 3,000 of these satellites that send internet signals to designated ground receivers. Unlike traditional internet providers, Starlink doesn’t require any ground infrastructure. One just needs to have a small satellite dish or a receiver device to access high-speed internet, much like satellite TV. Significance of Starlink: Global Connectivity: Starlink aims to offer high-speed internet to users worldwide, including those living in remote and rural areas with limited or no access to traditional broadband services. Low Latency: LEO satellites offer low latency, reducing the signal delay experienced with traditional geostationary satellites, making activities like online gaming and video conferencing smoother. Reliable and Redundant: The large number of satellites in the constellation allows for redundancy, minimizing service disruptions in case of satellite failures. Emergency Connectivity: Starlink has shown its potential in providing emergency internet access during natural disasters and crises, offering communication lifelines to affected communities. Challenges Space Debris: With thousands of satellites in LEO, concerns have been raised about space debris , its impact on the space environment and other satellite operations. Astronomy Interference: Starlink satellites have been criticized for interfering with ground-based astronomical observations due to their brightness and impact on the night sky. Monopoly Concerns: As Starlink expands its dominance in the satellite internet market, concerns arise about potential monopolistic control over global internet. Regulatory and Legal Challenges: Operating a massive satellite constellation involves navigating complex international regulations, spectrum management, and coordination with other satellite operators. Russia Ukraine – Operations controlled by company: After the Russia-Ukraine war broke out in 2022, fibre network lines and cell towers were the first pieces of infrastructure to be destroyed, rendering Starlink as the lifeblood of Ukraine’s communication network. When Internet connectivity is deployed in a region, the nature of the technology is such that its operations aren’t controlled by the user, but by the company. For example, if a piece of territory had fallen into Russian hands and a few Starlink dishes or terminals had been lost – it had to call up Starlink each time. SOURCE: Reuters Event Horizon Telescope (EHT) Syllabus Prelims- Science Context: Scientists have unveiled new details of a colossal black hole 53 million lightyears away first photographed by the earth-wide Event Horizon Telescope (EHT) in 2017. Background: The image of blackhole captured with the help of EHT was hailed at the time as a matter of “astonishment and wonder” for revealing “a part of the universe that was off limits”.In the image, a central dark region is encapsulated by a ring of light that looks brighter on one side.The massive galaxy, called Messier 87 or M87, is near the Virgo galaxy cluster 55 million light-years from Earth.The super-massive black hole has a mass that is 6.5 billion times that of our sun. About EHT: The EHT is not a single telescope but a worldwide network of radio telescopes that work together to study a common object in space. EHT benefit from a technique called very-long baseline interferometry, where the data each telescope collects about the object is correlated with data from the others using extremely precise clocks. The project is named for the event horizon, the proposed boundary around a black hole that represents the point of no return where no light or radiation can escape. About black hole A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can’t see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars. Size of Black hole: Smallest Black holes – Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Stellar – Its mass can be up to 20 times more than the mass of the sun. There may be many, many stellar mass black holes in Earth’s galaxy. Earth’s galaxy is called the Milky Way. Supermassive – The largest black holes are called “” These black holes have masses that are more than 1 million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy is called Sagittarius A. Source: The Hindu Previous Year Question: Consider the following phenomena: (2018) Light is affected by gravity. The Universe is constantly expanding. 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 media? 1 and 2 only 3 only 1 and 3 only 1, 2 and 3 Ans: (d) Index of industrial production (IIP) Syllabus Prelims : Economy Context: Industrial output witnessed mild recovery in December. Background: At 3.8 percent, the latest industrial growth figure as per the Index of Industrial Production (IIP) is up from the November 2023 figure of 2.4 percent. About Index of Industrial Production (IIP): Publication time: monthly.
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