AstroSat: 10 Years of Space Discoveries

AstroSat Completes a Decade of Stellar Discoveries

Why in the News ?

AstroSat, India’s first space-based astronomy observatory, has completed 10 years of successful operation since its launch on September 28, 2015. Despite a five-year design life, it continues to provide valuable multi-wavelength astronomical data and remarkable discoveries across the electromagnetic spectrum.

AstroSat: 10 Years of Space Discoveries

A Decade of Cosmic Exploration:

  • Milestone Achievement: AstroSat marked its 10th anniversary on September 28, 2025, highlighting India’s progress in space-based astronomical research.
  • Launch Details: It was launched aboard PSLV-C30 (XL) from Satish Dhawan Space Centre, Sriharikota, in 2015.
  • Extended Mission Life: Initially planned for five years, AstroSat continues to operate effectively even after a decade.
  • Scientific Contributions: It has enabled studies of black holes, neutron stars, Proxima Centauri, and distant galaxies emitting far-ultraviolet (FUV) photons from 3 billion light-years away.
  • Global Impact: The observatory’s findings have contributed to the global scientific community, offering crucial insights across UV to X-ray spectrums.

Technological Marvel with Five Advanced Payloads:

  • Multi-Wavelength Observation: AstroSat observes the universe in visible, ultraviolet, and X-ray bands
  • Five Key Payloads:

    • Ultra Violet Imaging Telescope (UVIT) – captures high-resolution UV images.
    • Large Area X-ray Proportional Counter (LAXPC) – studies time variations in X-ray sources.
    • Cadmium-Zinc-Telluride Imager (CZTI) – detects hard X-ray sources like gamma-ray bursts.
    • Soft X-ray Telescope (SXT) – analyzes spectral properties of soft X-rays.
    • Scanning Sky Monitor (SSM) – tracks transient X-ray events in space.
  • Precision Design: These instruments enable simultaneous multi-spectrum data, enhancing the accuracy of cosmic observations.
  • Scientific Utility: Supports both Indian and international research collaborations.
  • ISRO’s Legacy: Reinforces India’s technological self-reliance in space research instrumentation.

Key points : AstroSat and India’s Space Astronomy Program

●     Mission Objective: To study high-energy astrophysical phenomena across multiple wavelengths, bridging ground-based and space-based data.

●     Institutions Involved: Jointly developed by ISRO, IUCAA, TIFR, IIA, and Raman Research Institute, with collaboration from Canada and the UK.

●     Significance: India’s first dedicated space observatory, placing it among nations with advanced astrophysics capabilities.

●     Global Standing: AstroSat is comparable to missions like NASA’s Chandra and ESA’s XMM-Newton, symbolizing India’s entry into elite space science.