Scientific Knowledge — Science, Space, IT and Recent Technological Developments
Overview
Scientific Knowledge under Current Events tests your awareness of recent breakthroughs in science, space exploration, information technology and emerging technologies.
This topic bridges general science fundamentals with current affairs. You must track developments from ISRO, DRDO, CSIR and international agencies like NASA. Questions typically appear as direct factual recalls — mission names, launch dates, purposes of satellites, or names of indigenous technologies. Keeping a monthly log of science news alongside your static preparation gives you an edge here.
Success requires memorising mission names, their objectives, launch vehicles used and key dates. For IT, focus on government digital initiatives and cybersecurity programmes. Stay updated on Nobel Prizes in science categories and national science awards.
Key Concepts
- ISRO's Launch Vehicles: PSLV (Polar Satellite Launch Vehicle) is the workhorse for remote sensing satellites; GSLV (Geosynchronous Satellite Launch Vehicle) carries heavier communication satellites; LVM3 (formerly GSLV Mk III) is India's heaviest rocket used for Chandrayaan and Gaganyaan missions.
- Types of Satellites by Orbit: LEO (Low Earth Orbit) for earth observation; GEO (Geostationary Orbit) for communication; Polar orbit for mapping and weather monitoring.
- Chandrayaan Programme: India's lunar exploration series — Chandrayaan-1 (2008) discovered water molecules on Moon; Chandrayaan-2 (2019) had orbiter success but lander crash; Chandrayaan-3 (August 2023) achieved successful soft landing at lunar south pole, making India the fourth country to land on Moon and first at south pole.
- Gaganyaan Mission: India's first crewed spaceflight programme targeting to send Indian astronauts (Vyomanauts) to Low Earth Orbit; test flights using humanoid robot Vyommitra planned before human mission.
- Aditya-L1 Mission: India's first solar observatory mission launched in September 2023; placed at Lagrange Point L1 to study Sun's corona, solar winds and space weather.
- DRDO Achievements: Defence research body developing missiles (Agni, Prithvi, BrahMos), tanks (Arjun), aircraft (Tejas LCA) and advanced systems like anti-satellite weapons (Mission Shakti, 2019).
- Digital India Initiatives: Government programmes for digital empowerment — Aadhaar, DigiLocker, UMANG app, CoWIN, Government e-Marketplace (GeM), BharatNet for rural broadband.
- Artificial Intelligence and Emerging Tech: National AI Mission (IndiaAI), quantum computing research, 5G rollout in India, semiconductor manufacturing push under India Semiconductor Mission.
Formulas / Key Facts
| Mission/Technology | Key Details |
|---|---|
| Chandrayaan-3 | Launched 14 July 2023; landed 23 August 2023 at Shiv Shakti Point; Vikram lander + Pragyan rover |
| Aditya-L1 | Launched 2 September 2023; reached L1 point on 6 January 2024; carries 7 payloads |
| Gaganyaan | Target: 2025; LVM3 rocket; 3-member crew for 3-day mission in 400 km orbit |
| PSLV | 4-stage rocket; over 55 successful missions; launched 104 satellites in single mission (2017) |
| BrahMos | Joint India-Russia supersonic cruise missile; speed Mach 2.8; range 290–450 km |
| Tejas LCA | Indigenous light combat aircraft; entered IAF service; Mk1A variant under production |
| Mission Shakti | ASAT test on 27 March 2019; India became 4th country with anti-satellite capability |
| 5G India | Commercial rollout began October 2022 by Jio and Airtel |
| INS Vikrant | India's first indigenous aircraft carrier; commissioned August 2022 |
| Nobel Physics 2023 | Attosecond laser pulses — Agostini, Krausz, L'Huillier |
Worked Examples
Example 1: Which Indian space mission successfully landed on the Moon's south pole in 2023?
Solution: Chandrayaan-3. It was launched on 14 July 2023 aboard LVM3 rocket and achieved soft landing on 23 August 2023 at the lunar south pole region, later named Shiv Shakti Point. India became the first country to land near the Moon's south pole.
Example 2: What is the purpose of Aditya-L1 mission?
Solution: Aditya-L1 is India's first space-based solar observatory. Its purpose is to study the Sun's corona, solar emissions, solar winds and their effect on Earth's space environment. It is positioned at Lagrange Point 1 (L1), about 1.5 million km from Earth, where it can observe the Sun continuously without eclipses.
Example 3: Name the indigenous light combat aircraft developed by India.
Solution: Tejas (Light Combat Aircraft). It was developed by DRDO's Aeronautical Development Agency and manufactured by Hindustan Aeronautics Limited (HAL). It is a single-engine, delta-wing multirole fighter aircraft inducted into the Indian Air Force.
Common Mistakes
- Confusing launch vehicles → PSLV is for polar/sun-synchronous orbits and lighter payloads; GSLV/LVM3 are for heavier geostationary satellites. Remember: PSLV = "Polar", GSLV = "Geosynchronous".
- Mixing Chandrayaan mission outcomes → Chandrayaan-1 was orbiter only (discovered water); Chandrayaan-2 orbiter succeeded but Vikram lander crashed; Chandrayaan-3 was the successful landing mission. Don't claim Chandrayaan-2 landed successfully.
- Wrong year for Mission Shakti → ASAT test was in March 2019, not 2018 or 2020. It destroyed Microsat-R satellite at 300 km altitude.
- Assuming Gaganyaan has launched → As of 2024, Gaganyaan has not yet carried humans. Only uncrewed test flights are underway. Don't write that India has sent astronauts to space.
- Ignoring Indian contributions in global tech → Questions may ask about Indian scientists abroad or Indian-origin Nobel laureates. Track names like Venkatraman Ramakrishnan (Chemistry 2009) and recent awardees.
Quick Reference
- Chandrayaan-3: First south pole lunar landing — 23 August 2023 — Vikram lander, Pragyan rover.
- Aditya-L1: India's first solar mission — positioned at L1 point — studies Sun's corona.
- PSLV: India's reliable workhorse — 4 stages — over 55 missions.
- LVM3: Heaviest Indian rocket — used for Chandrayaan-3 and Gaganyaan.
- Mission Shakti (2019): India's ASAT test — fourth country with this capability.
- Digital India key apps: Aadhaar, DigiLocker, UMANG, CoWIN, GeM portal.