News in Shorts: 22 December 2025

BlueBird Block-2 Satellite

Context: ISRO’s LVM3-M6 mission will launch the BlueBird Block-2 satellite, the largest commercial communications satellite placed in Low Earth Orbit.

About BlueBird Block-2 Communication Satellite

• Introduction: BlueBird Block-2 is a next-generation commercial communication satellite developed by AST SpaceMobile (USA) to deliver direct space-based cellular broadband connectivity to standard mobile smartphones without specialised ground equipment.
• Mission Objective: To demonstrate and operationalise direct-to-device satellite broadband, enabling seamless mobile connectivity in remote, underserved, and disaster-affected regions using Low Earth Orbit (LEO) infrastructure.
• Key Features
• • Direct-to-Smartphone Connectivity: Enables cellular broadband access without terrestrial towers or satellite phones.
  • Low Earth Orbit Deployment: Operates closer to Earth, ensuring lower latency and improved signal strength.
  • High-Capacity Design: Among the largest and heaviest commercial communication satellites deployed in LEO to date.
• Significance: The mission strengthens India’s role in the global commercial launch market while advancing next-generation satellite-based mobile broadband infrastructure.

About Launch Vehicle: LVM3-M6

• Launch Vehicle Mark-3 (LVM3) is ISRO’s heavy-lift, three-stage rocket.
• Carrying Capacity: It has a lift-off mass of 640 tonnes, a height of 43.5 m, and a payload capability of 4,200 kg to Geosynchronous Transfer Orbit (GTO).
• Configuration: 
  • First Stage: Two solid strap-ons (S200), 
  • Second Stage: liquid core stage (L110),
  • Third Stage: cryogenic upper stage (C25).
• Mission Significance: Sixth operational flight of LVM3 and the heaviest payload launched by LVM3 from Indian soil.
  • It successfully launched Chandrayaan-2, Chandrayaan-3, and two OneWeb missions carrying 72 satellites.

Autophagy

Context: Researchers at Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) identified the exocyst complex, traditionally known for secretion, as a key missing link in early autophagosome biogenesis.

• JNCASR is an autonomous institution under the Department of Science and Technology (DST).

About Autophagy

• Autophagy is a conserved cellular housekeeping process by which cells degrade and recycle damaged organelles, protein aggregates, and pathogens through lysosome-mediated digestion, thereby maintaining cellular homeostasis.
• Exocyst Complex: The exocyst complex is an evolutionarily conserved assembly of eight proteins involved in targeted vesicle trafficking to the cell membrane.
  • Recent findings show it also plays a crucial role in early autophagosome formation, linking secretion machinery with cellular waste clearance.
  • Loss of the exocyst complex disrupts autophagosome formation, leading to defective cellular waste clearance, a mechanism elucidated using yeast model systems.
• Process of Autophagy
  • Autophagy begins with the initiation of a membrane structure called the phagophore, which expands to engulf damaged cellular components.
  • This structure matures into a double-membraned autophagosome, often described as a cellular “trash bag”.
  • The autophagosome then fuses with a lysosome, where its contents are broken down and recycled for cellular use.
  • The process is especially crucial in long-lived cells like neurons, which cannot dilute damage through cell divisions.

Potential Applications

• Neurodegenerative Diseases: Insights can help restore impaired autophagy in Alzheimer’s, Parkinson’s, and Huntington’s diseases, where toxic protein accumulation damages neurons.
• Cancer Therapy: Understanding autophagy regulation can enable context-specific interventions, suppressing early tumor formation while preventing cancer cells from hijacking autophagy for survival.
• Drug Development: Identification of early-stage molecular regulators provides new therapeutic targets for precision modulation of autophagy pathways.

National Mathematics Day

Context: National Mathematics Day was observed on December 22 across India to honour the birth anniversary of legendary mathematician Srinivasa Ramanujan.

About National Mathematics Day

• National Mathematics Day is observed annually to promote awareness about the importance of mathematics in education, scientific advancement, and everyday problem-solving.
• Origin: The Government of India instituted National Mathematics Day in December 2011, declaring December 22 as the observance day to commemorate Srinivasa Ramanujan’s birth anniversary.
• It aims to encourage mathematical thinking, strengthen research culture, and inspire students by highlighting mathematics as a foundational discipline for science, technology, and innovation. 

About Srinivasa Ramanujan

• Introduction: Srinivasa Ramanujan (1887–1920) was a legendary mathematician of India, who was born on 22nd December 1887, in Tamilnadu.
• Contributions: He made path-breaking contributions to number theory, infinite series, partitions, continued fractions, and modular forms, many of which continue to influence modern mathematics and theoretical physics.
  • The number 1729, known as the Hardy-Ramanujan number, is the smallest positive integer expressible as the sum of two positive cubes in two different ways: 1³ + 12³ and 9³ + 10³
• Legacy : The Ramanujan Prize sponsored by the Department of Science and technology extends Srinivasa Ramanujan’s legacy by nurturing mathematical excellence and global recognition among young researchers from developing countries.
• Death: He died on April 26, 1920, at age 32, in Kumbakonam, India, from complications of tuberculosis.

Adamya-class Fast Patrol Vessel

Context: Recently, Indian Coast Guard Ship Amulya, a new-generation Adamya-class Fast Patrol Vessel, was commissioned in Goa strengthening India’s coastal security.

About Indian Coast Guard (ICG) Ship ‘Amulya’

• Introduction: ICG Ship Amulya is the third of eight Adamya-class Fast Patrol Vessels, designed and built indigenously by Goa Shipyard Limited, reflecting advanced maritime capability.
• Features
• • Indigenous Design: Built with over 60% indigenous components, aligning with Aatmanirbhar Bharat and Make in India initiatives.
  • Propulsion and Performance: Powered by two 3000 kW diesel engines, it achieves a top speed of 27 knots with an endurance of 1,500 nautical miles.
  • Operational Capability: Equipped with state-of-the-art indigenous weapons and systems, ensuring high manoeuvrability and rapid response at sea.
• Base: The vessel will be based at Paradip, Odisha, under the administrative and operational control of the Commander, Coast Guard Region (North East).

Significance

• Coastal Security: Enhances surveillance, interdiction, search and rescue, anti-smuggling, and pollution response across India’s maritime zones.
• Defence Self-Reliance: Demonstrates India’s growing capability in indigenous shipbuilding and naval system integration.
• Fleet Modernisation: Contributes to the Indian Coast Guard’s ongoing fleet expansion, strengthening maritime governance and law enforcement.

National Maritime Heritage Complex (NMHC)

Context: India and the Netherlands signed an MoU to collaborate on developing the National Maritime Heritage Complex at Lothal, Gujarat, strengthening maritime heritage cooperation.

About National Maritime Heritage Complex (NMHC)

• The National Maritime Heritage Complex is an ambitious cultural and tourism project at Lothal, Gujarat, envisioned as the world’s largest maritime heritage complex.
• Objective: It aims to showcase India’s 4,500-year-old maritime legacy through world-class museums, research facilities, joint exhibitions, and educational outreach
  • It is supported under the Sagarmala Programme of the Ministry of Ports, Shipping and Waterways.
• Significance: The NMHC seeks to place India’s maritime history on the global stage while promoting inclusive education, heritage conservation, and cultural tourism.

About Lothal

• Lothal is one of the southernmost sites of the Harappan (Indus Valley) civilisation, representing India’s early maritime and urban planning heritage.
• Location: It is located in the Bhal region of Gujarat, between the Bhogavo and Sabarmati rivers, near the Gulf of Khambhat.
• Features
• • World’s earliest known dockyard, indicating advanced tidal and maritime engineering.
  • Evidence of bead-manufacturing workshops and extensive trade networks.
  • Maritime trade links with Mesopotamia and Egypt, dating back nearly 4,000 years.
• Additional Facts: The site was discovered in 1954 by S.R. Rao and declared UNESCO World Heritage status in 2014.

White Spot Disease

Context: The Union Government informed Parliament that no severe shrimp losses were reported in Andhra Pradesh despite detected cases of White Spot Disease under national surveillance.

About White Spot Disease

• White Spot Disease is a highly contagious viral disease in shrimp caused by the White Spot Syndrome Virus (WSSV), posing a major threat to coastal aquaculture.
• Impact: The disease can cause mass mortality within days, leading to significant economic losses for shrimp farmers and disrupting export-oriented aquaculture value chains.
• Treatment and Management: There is no curative treatment for White Spot Disease; management relies on early diagnosis through PCR-based testing, strict farm hygiene, controlled stocking densities, and rapid removal of infected stock.
• Prevention
  • National Surveillance: Implemented through the National Surveillance Programme for Aquatic Animal Diseases (NSPAAD) under PMMSY for early detection and reporting.
  • Biosecurity Measures: Mandatory quarantine of imported broodstock, registration of hatcheries and farms with the Coastal Aquaculture Authority (CAA), and promotion of Specific Pathogen Free (SPF) shrimp stocks.
  • Technology Adoption: Encouragement of Biofloc Technology (BFT) and Recirculatory Aquaculture Systems (RAS) to reduce disease risks.
• Government Support Measures
  • Aquaculture Crop Insurance: Coverage provided under PM-MKSSY, with insurance claims disbursed to affected farmers.
  • Digital Reporting: The “Report Fish Disease” mobile app enables real-time coordination between farmers, field officers, and fish health experts.

World Meditation Day

Context: World Meditation Day is observed every year on December 21 to raise global awareness about the benefits of meditation for physical, mental, and emotional well-being.

About World Meditation Day

• Observed on: 21 December, coinciding with the Winter Solstice (shortest day and longest night in the Northern Hemisphere).
• Theme of World Meditation Day 2025: “Inner Peace – Global Harmony”
• Declared by: United Nations General Assembly (UNGA) in December 2024, through a resolution co-sponsored by India.
• Objective: To promote mental health, emotional well-being, mindfulness, and inner peace at individual and societal levels.
• Global Significance: Highlights meditation as a non-pharmacological, preventive health practice, aligning with SDG 3 (Good Health and Well-being).
• India’s Role: Reflects India’s leadership in yoga and meditative traditions and its philosophy of Vasudhaiva Kutumbakam.
• Symbolism of Date: Winter solstice represents transition, renewal, and inner transformation, mirroring the purpose of meditation.
• Observance: Marked worldwide through mass meditation sessions, public awareness programmes, and digital campaigns.

About Meditation

• Meditation is an ancient mind–body practice that trains attention and awareness to focus on the present moment.
• Rooted in religious, yogic, and secular traditions, it has been practiced for thousands of years across cultures.
• It involves techniques such as mindfulness, focused attention, and concentrated contemplation.
• The practice aims to achieve mental clarity, emotional calmness, and physical relaxation.
• Scientific studies show benefits such as stress reduction, improved focus, emotional balance, and better sleep.
• Today, digital platforms and apps have made meditation widely accessible, integrating it into modern lifestyles.

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