Solar Orbiter Mission

Sept. 4, 2025

According to a new study the European Space Agency’s (ESA) Solar Orbiter Mission has traced the origin of Solar Energetic Electrons (SEEs) emerging from the Sun.

About Solar Orbiter Mission:

  • It is a joint project of the European Space Agency and NASA which was launched in 2020.
  • Objective: It explores the Sun and heliosphere from close up and out of the ecliptic plane.
  • Payload: It carries six remote-sensing instruments to observe the Sun and the solar corona, and four in-situ instruments to measure the solar wind, energetic particles, and electromagnetic fields.

What are Solar Energetic Electrons (SEE)?

  • These are high-energy particles produced by the Sun.
  • These particles play a key role in shaping the cosmic environment.
  • Sources: They can be emitted during solar flares or coronal mass ejections
  • Recent findings: It is observed that one type of SEE is tied to intense solar flares, explosive bursts from smaller patches of the Sun’s surface, while another stems from coronal mass ejections (CMEs).
  • Between November 2020 and December 2022, the Solar Orbiter observed more than 300 bursts of SEEs.
  • Significance: it will deepen understanding of space weather.

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