Which statement about space weather is true?

• A. Space weather is solely theoretical.
• B. Space weather has no impact on unmanned missions.
• C. Space weather only affects communications on Earth.
• D. Solar activity and particle radiation can interfere with spacecraft electronics and sensors.

Answer: (D)

Space weather describes the Sun-driven environment in space that can interact with spacecraft. The statement is true because solar activity and energetic particle radiation can penetrate shielding and disturb or damage spacecraft electronics and sensors. These particles can cause single-event upsets in memory and logic, trigger latchups, degrade solar panels, and add noise or drift to sensors. Spacecraft operate directly in this environment, so such effects aren’t limited to Earth or to manned missions; unmanned satellites routinely experience these risks and may enter safe modes or adjust operations during intense solar activity. In short, solar activity and particle radiation pose real, practical interference to spacecraft systems, making this the accurate description.