ISRO Confirms Frequent Cosmic Dust Impacts Using Indigenous Detector

The Indian Space Research Organisation (ISRO) has confirmed that a cosmic dust particle strikes Earth’s atmosphere roughly every 1,000 seconds, using India’s first indigenously developed cosmic dust detector — the Dust EXperiment (DEX).

About Interplanetary Dust Particles (IDPs)
Interplanetary Dust Particles (IDPs) are microscopic fragments originating from comets and asteroids. These high-speed particles form the atmosphere’s enigmatic “meteor layer” and occasionally appear as shooting stars when they burn up in the atmosphere.

DEX: India’s First Cosmic Dust Hunter
DEX is the first Indian-made instrument designed to detect high-velocity IDPs. The compact detector is engineered to “hear” hypervelocity impacts, capturing crucial data that enhances scientific understanding of the near-Earth space environment.

• Weight: 3 kg
• Power consumption: Only 4.5 watts
• Technology: Hypervelocity impact detection principle

Mission and Deployment
DEX was flown aboard the PSLV Orbital Experimental Module (POEM) of the PSLV-C58 XPoSat mission, launched on January 1, 2024. The instrument was deployed at an altitude of 350 km above Earth.

Pathway to Planetary and Deep-Space Exploration
ISRO stated that DEX serves as a blueprint for future dust detectors capable of studying cosmic dust around bodies with or without atmospheres. The success of the Earth-orbiting experiment opens the door for:

• First-ever direct IDP measurements in the atmospheres of Venus and Mars
• New dust environment studies around the Moon

Critical for Space Safety and Human Missions
Beyond scientific discovery, the data from DEX is mission-critical. Measuring IDPs is essential to:

• Monitor the space environment
• Assess impact hazards to satellites
• Ensure the safety of future human missions to the Moon, Mars, and deep space