10 January 2026 - Daily Current Affairs Updates

GS–1 | INDIAN GEOGRAPHY & CULTURAL LANDSCAPE

1. Sagar Island (Gangasagar)

Subtopic: Deltaic Geography, Pilgrimage Centres & Infrastructure

Value Addition:

• News Context:

  • Foundation stone laid for a 5-km bridge over the Muriganga River, connecting Sagar Island to the mainland.

• Location:

  • Situated in the Ganga delta region, West Bengal.

  • Around 100 km south of Kolkata.

  • Part of South 24 Parganas district.

• Physical Geography:

  • Lies at the mouth of the Hooghly River, a major distributary of the Ganga.

  • Separated from mainland by an arm of the Hooghly (Muriganga) on the eastern side.

  • Though part of the Sundarbans region, it does not have mangroves or tiger habitation.

  • Lacks small tidal tributaries typical of the Sundarbans delta.

• Administrative Profile:

  • Comprises 43 villages.

• Cultural & Religious Importance:

  • Located at the confluence of the Ganga river system and the Bay of Bengal.

  • Considered highly sacred in Hindu tradition.

  • Hosts the Ganga Sagar Fair every mid-January.

  • Second largest religious congregation in the world after Kumbh Mela.

  • Kapil Muni Temple is the central pilgrimage site.

Subject Analysis:

• High-yield GS-1 topic linking deltaic landforms, river systems, and cultural geography.

• Bridge project adds an infrastructure + disaster-management angle (cyclones, evacuation).

GS–3 | BIODIVERSITY & ENTOMOLOGY

2. Meadow Katydids (New Species from J&K)

Subtopic: Species Discovery, Insect Diversity & Himalayan Ecology

Value Addition:

• News Context:

  • Discovery of three new meadow katydid species in Jammu and Kashmir.

• Species Identified:

  • Conocephalus nagariensis – Budgam district

    • Spindle-shaped cerci.

    • Stridulatory file with 34 teeth.

    • Named after Dr Rajendra Nagar.

  • Conocephalus ganderbali – Ganderbal district

    • Small and slender body.

    • 28 teeth in stridulatory file.

    • Distinct V-shaped incision on underbelly.

  • Conocephalus usmanii

    • Flat, elongated abdominal plate.

    • 36 teeth in stridulatory file.

    • Named after Prof. Mohd Kamil Usmani.

• About Katydids:

  • Family: Tettigoniidae.

  • Order: Orthoptera (straight wings).

  • Found on all continents except Antarctica.

  • Mostly nocturnal, strong camouflage.

  • Long, thread-like antennae (unlike grasshoppers).

  • Sound produced by stridulation (leg–wing rubbing).

• Meadow Katydids (Genus Orchelimum):

  • Around 20 species.

  • Found near grassy meadows, lakes, ponds.

  • Can submerge in water when disturbed.

  • Brown upper body, green underside, large orange eyes.

Subject Analysis:

• Important GS-3 topic on new species discovery and Himalayan biodiversity.

• Frequently tested in prelims for taxonomy, habitat, and adaptive behaviour.

GS–3 | AGRICULTURE & INDIGENOUS CROPS

3. Nagauri Ashwagandha (GI Tag)

Subtopic: Medicinal Plants, GI Protection & Arid Agriculture

Value Addition:

• News Context:

  • Granted Geographical Indication (GI) tag.

• Geographical Origin:

  • Nagaur district, Rajasthan.

• Agro-Climatic Advantage:

  • Dry climate and sandy soils ideal for cultivation.

• Distinctive Features:

  • Longer, thicker roots rich in alkaloids.

  • Roots are brittle and starchy.

  • Berries have dark, bright red colour, a quality marker.

• Quality Status:

  • Considered the finest ashwagandha variety in arid regions.

About Ashwagandha (Withania somnifera):

• Known as Indian ginseng / winter cherry.

• Thrives in dry, semi-tropical regions.

• Soil: Sandy loam, good drainage, pH 7.5–8.0.

• Rainfall: 500–750 mm (rainfed).

• Temperature tolerance: 20–38°C.

• Major producing states: MP, Rajasthan, Punjab, Haryana, UP, Gujarat, Maharashtra.

Subject Analysis:

• High-probability GS-3 topic on GI tags, medicinal crops, and traditional knowledge.

• Useful for mains answers on farmer income and value addition.

GS–3 | SPACE SCIENCE & ASTRONOMY

4. Dust Experiment (DEX)

Subtopic: Space Environment, Interplanetary Dust & Mission Safety

Value Addition:

• News Context:

  • India’s first confirmation that one interplanetary dust particle enters Earth’s atmosphere every ~1,000 seconds.

• Instrument Profile:

  • First Indian-developed dust detection instrument.

  • Designed to capture high-speed, transient dust impacts.

  • Developed by Physical Research Laboratory (PRL).

• Mission Details:

  • Flown onboard PSLV-C58 XPoSat mission.

  • Launched on 1 January 2024.

  • Operated at ~350 km altitude.

• Technical Features:

  • 3-kg detector using hypervelocity impact detection.

  • Power consumption: ~4.5 watts.

  • Blueprint for dust studies on planets with or without atmospheres.

• Strategic Significance:

  • Improves understanding of space debris and cosmic dust hazards.

  • Relevant for human spaceflight missions like Gaganyaan.

Subject Analysis:

• GS-3 topic linking space science with mission safety and deep-space exploration.

• Increasingly relevant due to crowded orbital environments.

GS–3 | SPACE TECHNOLOGY & SATELLITES

5. PSLV-C62 Mission

Subtopic: Launch Vehicles, Earth Observation & Space Startups

Value Addition:

• Mission Context:

  • India’s first space launch of 2026.

  • Launch site: Sriharikota.

• Mission Type:

  • Multi-payload mission.

  • 1 primary + 18 secondary payloads.

Primary Payload – EOS-N1 (Anvesha):

• Hyperspectral Earth observation satellite.

• Developed mainly for strategic applications.

• Observes Earth in hundreds of spectral bands.

• Uses:

  • Defence and border surveillance.

  • Civilian uses: agriculture, urban mapping, minerals, environment.

International & Commercial Payloads:

• Kestrel Initial Demonstrator (Europe) – re-entry capsule.

• 17 commercial payloads from India, UAE, Mauritius, Luxembourg, Singapore, Europe, USA.

Indian Startup Highlight – AayulSAT:

• Developed by OrbitAID Aerospace (Bengaluru).

• India’s first on-orbit satellite refuelling experiment.

• Enables in-orbit servicing, life-extension of satellites.

• Critical for space sustainability and debris management.

Subject Analysis:

• High-value GS-3 topic on private sector participation and NewSpace ecosystem.

• Frequently used in mains answers on space economy and indigenisation.