• NASA is launching a new mission called PUNCH (Polarimetry to Unify the Corona and Heliosphere) to study the sun’s outer atmosphere and understand solar winds and Coronal Mass Ejections (CMEs).
  • These solar events affect space weather and can impact systems on Earth like satellite communication and GPS.
  • The mission will launch on February 28, 2025, using SpaceX to carry four small satellites into Low Earth Orbit (LEO).

MISSION DETAILS

NASA's Punch Mission explained for UPSC

KEY FEATURES OF PUNCH

  • Polarisation Measurement:
    • PUNCH will use polarised light to study the sun.
    • It will use polarising filters to measure how sunlight is scattered by particles in the corona, giving scientists detailed information about solar activity.
  • 3D Imaging:
    • PUNCH will use four cameras working together to create 3D images of the sun’s corona, offering a unique look at solar winds and CMEs.
  • Continuous Imaging:
    • The cameras will take images of the sun every four minutes and capture both polarised and unpolarised light at different times.
  • Wide and Narrow Field Imaging:
    • The Wide Field Imagers (WFI) will capture a large area of the sun’s atmosphere, while the Narrow Field Imager will focus on specific regions for more detailed observations.

SCIENTIFIC IMPACT

  • Tracking Solar Winds and CMEs:
    • PUNCH will help scientists understand how solar winds and CMEs form, evolve, and move through space.
    • This information is important for predicting when these solar events might reach Earth.
  • Space Weather Prediction:
    • Data from PUNCH will help improve predictions of space weather events.
    • This will help reduce the impact of solar storms on Earth and space missions.

WHY IT MATTERS?

  • Impact on Earth: Solar events can disrupt satellite communication, GPS systems, and power grids on Earth.
  • Space Exploration: Solar weather can also affect spacecraft, so understanding it is important for protecting both Earth’s technology and future space missions.
  • Better Predictions: The mission will improve our ability to predict space weather, helping us prepare for its effects.