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Dust Experiment (DEX)

Jan. 8, 2026

Recently, the Indian Space Research Organisation confirmed through it’s first-ever Dust Experiment (DEX) that an interplanetary dust particle enters Earth’s atmosphere approximately every 1,000 seconds.

About Dust Experiment (DEX):

  • It is the first Indian-made instrument to hunt for these high speed Interplanetary Dust Particles (IDPs). 
  • It is the first-of-its-kind instrument designed to detect such high-transient particles.
  • It is developed by the Physical Research Laboratory,
  • It was flown on PSLV Orbital Experimental Module (POEM) of the PSLV-C58 XPoSat Mission.
  • Features of Dust Experiment (DEX):
    • It is a compact instrument tuned to hear impacts, capturing vital data.
    • It is a blueprint of the detector which can study the cosmic dust particle at any planet having atmosphere or no atmosphere.
  • Significance:
    • Its data redefines our understanding of the universe and charts the path for safe human deep-space missions.
    • Understanding and collecting data on interplanetary dust in Earth’s atmosphere will also be valuable for planning Gaganyaan missions.

What are Interplanetary Dust Particles (IDPs)? 

  • Interplanetary dust refers to micrometer-scale particles originating from the solar system.
  • These are microscopic shrapnel from comets and asteroids that form our atmosphere's mysterious "meteor layer", and show up as “shooting star” in night. 
  • These can be analyzed to gain insights into their origins, formation mechanisms, and the processes that occurred in early solar and presolar environments.

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