SSC Stenographer 2026 PYQ — Question 9

Solution: The correct answer is Aditya-L1.
Explanation:
☛ Aditya-L1 is India's first dedicated space-based observatory mission designed to study the Sun.
☛ It was launched by the Indian Space Research Organisation (ISRO) on September 2, 2023, using the PSLV-C57 rocket.
☛ The spacecraft is placed in a halo orbit around the Lagrangian Point 1 (L1) of the Sun-Earth system, approximately 1.5 million km from Earth.
☛ A major objective of this mission is to observe solar activities such as solar flares and Coronal Mass Ejections (CMEs) that directly impact Earth's space weather.
Extra Exam-Relevant Facts:
☛ Payloads: Aditya-L1 carries 7 distinct scientific payloads developed indigenously to observe the photosphere, chromosphere, and the outermost layers (corona) of the Sun.
☛ Astrosat: Launched in September 2015, it is India's first dedicated multi-wavelength space observatory.
☛ RISAT-2: It is a radar imaging satellite launched in 2009 using Synthetic Aperture Radar (SAR) for Earth observation, border surveillance, and disaster management.
☛ Bhaskara series: Bhaskara-I (1979) and Bhaskara-II (1981) were India's early experimental remote sensing satellites.
Important One-Liners for Upcoming Exams:
☛ What is the distance between the Earth and the Sun-Earth Lagrange point 1 (L1)? → Approximately 1.5 million kilometres
☛ Which launch vehicle was used to launch the Aditya-L1 mission? → PSLV-C57
☛ What is the primary payload of Aditya-L1 designed to observe the solar corona? → VELC (Visible Emission Line Coronagraph)
☛ In which year was India's first dedicated multi-wavelength astronomy mission 'AstroSat' launched? → 2015
☛ What was the name of India's first indigenous satellite launched in 1975? → Aryabhata