Dazzling auroras seen worldwide after solar blast from the Sun. Pictures inside
The storm has continued with few breaks for more than 60 hours. (Photo: X/@@BsauceSays)
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A halo CME is an eruption of solar plasma and magnetic field that appears to form a halo around the Sun when it is moving directly along the line of sight—either toward or away from Earth. If it's Earth-directed, it can have serious effects on technology and infrastructure.Solar physicists confirmed that the storm had continued with few breaks for more than 60 hours, pointing to the power and effectiveness of the CME that might go down as the strongest event of the ongoing Solar Cycle 25.The source of this solar eruption is Sunspot 4100, which erupted in a dramatic fashion on May 31.
Aurora Borealis seen over Washington State. (Photo: X/@PNWAurora)
advertisementEarth-orbiting satellites detected an M8.2-class solar flare that lasted more than three hours, an unusually long and powerful event. While technically just shy of the X-class threshold, the flare's slow, sustained energy release provided ample force to launch a massive CME from the Sun's atmosphere.The northern lights were also seen in San Diego and some residents in Tulsa, reported catching glimpses of the aurora. Meanwhile, in the Southern Hemisphere, pink and red auroras were spotted lighting up the skies over Queenstown in Tasmania.East of High River 20250603T0600ZJust arrived as the aurora fired up pic.twitter.com/dHTupNJoPa— Harlan Thomas (@theauroraguy) June 3, 2025Before the storm hit, experts had predicted that the auroras might be visible across a wide swath of the northern United States, including Alaska, Washington, Montana, North Dakota, South Dakota, Wisconsin, Michigan, Vermont, New Hampshire and Maine, along with most of Wyoming, Idaho, Iowa and New York.Forecasts also suggested potential sightings in parts of Oregon, Nebraska, Illinois, Indiana, Ohio, Pennsylvania and Massachusetts.Must Watch
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Indian Express
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- Indian Express
Daily subject-wise quiz : Science and Technology MCQs on Europa moon, chromosphere, NISAR mission and more (Week 120)
UPSC Essentials brings to you its initiative of subject-wise quizzes. These quizzes are designed to help you revise some of the most important topics from the static part of the syllabus. Attempt today's subject quiz on Science and Technology to check your progress. 🚨 Click Here to read the UPSC Essentials magazine for July 2025. Share your views and suggestions in the comment box or at With reference to the NISAR mission, consider the following statements: 1. It is an Earth observation satellite jointly developed by NASA and ISRO. 2. The satellite will be launched on the PSLV-C61 and put in a sun-synchronous orbit. 3. The satellite will scan the entire globe every 30 days, providing a series of very detailed images of the Earth's surface. 4. It will be the first satellite ever to observe the Earth in two frequencies. How many of the statements given above are correct? (a) Only one (b) Only two (c) Only three (d) All four Explanation — The much-awaited launch of NISAR — an earth observation satellite jointly developed by NASA and ISRO — is set to take place on July 30 at 5:40 pm from the country's only spaceport in Sriharikota, Andhra Pradesh. Hence, statement 1 is correct. — The satellite will be launched on the GSLV-F16 and be put in a 734 km sun synchronous orbit — an orbit in which the satellite reaches over a place at the same time each day. Hence, statement 2 is not correct. — The satellite will scan the entire globe every 12 days, providing a series of very detailed images of the Earth's surface. Hence, statement 3 is not correct. — NISAR, which stands for NASA-ISRO Synthetic Aperture Radar, will provide an unprecedented view of the planet. Weighing 2,392 kg it will be the first satellite ever to observe the Earth in two frequencies — NASA's L-band and ISRO's S-band. 'Each system's signal is sensitive to different sizes of features on Earth's surface, and each specializes in measuring different attributes, such as moisture content, surface roughness, and motion,' according to NASA. Hence, statement 4 is correct. Therefore, option (b) is the correct answer. With reference to the chromosphere, consider the following statements: 1. It is a region sandwiched between the sun's atmosphere (the million-degree corona) and the photosphere (the sun's visible surface). 2. It is in the chromosphere where the solar flares, hot plasma jets, and powerful energy fluxes originate. Which of the statements given above are correct? (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2 Explanation — Solar physicists will make a new attempt to observe the chromosphere of the sun, which is the most dynamic region. 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Statement II : The James Webb Space Telescope has detected carbon dioxide and crystalline water ice on Europa's surface, indicating recent exposure of subsurface ocean material. Which one of the following is correct? (a) Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I (b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I (c) Statement-I is correct but Statement-II is incorrect (d) Statement-I is incorrect but Statement-II is correct Explanation — Europa is widely regarded as one of the most promising places in our solar system to search for signs of life due to its subsurface ocean and signs of active geology. Hence, statement 1 is correct. — James Webb Space Telescope observations confirmed the presence of crystalline water ice, carbon dioxide, and sodium chloride on Europa's surface—especially in areas like Tara Regio—suggesting that material from the subsurface ocean is reaching the surface. Hence, statement 2 is correct. — These findings support the idea that Europa may have the chemical and physical conditions necessary for life, making the Statement II a correct explanation for the Statement I. Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I Therefore, option (a) is the correct answer. CoinDCX, recently in the news, is related to: (a) A government digital payment initiative (b) A space-tech startup collaborating with ISRO (c) A cryptocurrency exchange that suffered a major hack (d) A fintech app launched by RBI for rural banking Explanation — CoinDCX, Mumbai‑based crypto exchange, lost US $44.2 million from an internal operational wallet hack on July 19, 2025, discovered 17 hours later by blockchain investigator ZachXBT. — It marks India's second major crypto hack in one year, reinforcing the urgency for stronger cybersecurity protocols and regulatory standards in the digital asset domain. Therefore, option (c) is the correct answer. With reference to the NASA's sounding-rocket mission, consider the following statements: 1. The instrument SNIFS is designed to study the Sun's chromosphere, which lies between the photosphere and the corona. 2. SNIFS will capture 3D spectroscopic data, obtaining a full spectrum for each pixel in view. 3. The mission will measure the hydrogen Lyman‑α spectral line, a key diagnostic tool for chromospheric conditions. 4. SNIFS is an orbital satellite mission scheduled to operate for several years. Which of the statements given above are correct? (a) 1 and 2 only (b) 1, 2 and 3 only (c) 2, 3 and 4 only (d) 1, 2, 3 and 4 Explanation — SNIFS (Solar EruptioN Integral Field Spectrograph) will study the chromosphere, the dynamic layer sandwiched between the Sun's visible surface (photosphere) and the outer corona. Hence, statement 1 is correct. — It is the first ultraviolet integral field spectrograph to fly for solar study, providing 3D data sets where each pixel carries its own spectrum. Hence, statement 2 is correct. — SNIFS targets the Lyman-α spectral line of hydrogen, the brightest line in the solar ultraviolet spectrum, crucial for diagnosing chromospheric temperature, velocity, and density. Hence, statement 3 is correct. — SNIFS is a suborbital sounding‑rocket experiment, not a satellite mission; it will operate for under 10 minutes, not years. Hence, statement 4 is not correct. Therefore, option (b) is the correct answer. Daily Subject-wise quiz — History, Culture, and Social Issues (Week 118) Daily subject-wise quiz — Polity and Governance (Week 120) Daily subject-wise quiz — Science and Technology (Week 119) Daily subject-wise quiz — Economy (Week 119) Daily subject-wise quiz — Environment and Geography (Week 119) Daily subject-wise quiz – International Relations (Week 119) Subscribe to our UPSC newsletter and stay updated with the news cues from the past week. Stay updated with the latest UPSC articles by joining our Telegram channel – IndianExpress UPSC Hub, and follow us on Instagram and X. Manas Srivastava is currently working as Senior Copy Editor with The Indian Express (digital) and leads a unique initiative of IE - UPSC Essentials. He majorly writes on UPSC, other competitive exams and education-related projects. In the past, Manas has represented India at the G-20 Youth Summit in Mexico. He is a former member of the Youth Council, GOI. A two-time topper/gold medallist in History (both in graduation and post-graduation) from Delhi University, he has mentored and taught UPSC aspirants for more than five years. His diverse role in The Indian Express consists of writing, editing, anchoring/ hosting, interviewing experts, and curating and simplifying news for the benefit of students. He hosts the YouTube talk show called 'Art and Culture with Devdutt Pattanaik' and a LIVE series on Instagram and YouTube called 'LIVE with Manas'.His talks on 'How to read a newspaper' focus on newspaper reading as an essential habit for students. His articles and videos aim at finding solutions to the general queries of students and hence he believes in being students' editor, preparing them not just for any exam but helping them to become informed citizens. This is where he makes his teaching profession meet journalism. He is also the editor of UPSC Essentials' monthly magazine for the aspirants. He is a recipient of the Dip Chand Memorial Award, the Lala Ram Mohan Prize and Prof. Papiya Ghosh Memorial Prize for academic excellence. He was also awarded the University's Post-Graduate Scholarship for pursuing M.A. in History where he chose to specialise in Ancient India due to his keen interest in Archaeology. He has also successfully completed a Certificate course on Women's Studies by the Women's Studies Development Centre, DU. As a part of N.S.S in the past, Manas has worked with national and international organisations and has shown keen interest and active participation in Social Service. He has led and been a part of projects involving areas such as gender sensitisation, persons with disability, helping slum dwellers, environment, adopting our heritage programme. He has also presented a case study on 'Psychological stress among students' at ICSQCC- Sri Lanka. As a compere for seminars and other events he likes to keep his orating hobby alive. His interests also lie in International Relations, Governance, Social issues, Essays and poetry. ... Read More
Time of India
a day ago
- Time of India
Spacetech startup Inbound Aerospace raises $1 million in funding from Speciale Invest
Synopsis Inbound Aerospace, an IIT Madras-incubated startup, secured $1 million in funding to develop autonomous, reusable re-entry vehicles for Earth-space experiment delivery and return. Addressing the impending ISS retirement, their spacecraft will facilitate in-orbit testing, microgravity research, and in-space manufacturing. Targeting a 2028 launch, Inbound aims to revolutionize space-based research and production.
