Space weather can affect which of the following aspects of space operations?

Space weather can affect which of the following aspects of space operations?

• A. Only ground communications.
• B. Only the space environment around Earth.
• C. Only astronaut safety.
• D. Satellites and communications via solar activity and particles, causing radiation damage and drag changes.

Answer: (D)

Space weather is about how solar activity changes the near-Earth environment and how those changes ripple through space operations. When the Sun erupts with flares, coronal mass ejections, or streams of energetic particles, several things can happen to spacecraft and their links to Earth.

Radiation damage is a key pathway: high-energy particles can penetrate shielding and cause single-event upsets or latchups in electronics, degrade solar panels, and increase radiation dose for any astronauts aboard. At the same time, solar activity can heat and expand the upper atmosphere, increasing atmospheric density at low Earth orbit heights. That extra drag alters satellite orbits, potentially changing altitude and lifetime and forcing reboosts or mission adjustments.

Ionospheric disturbances from solar activity also affect communications and navigation signals, leading to degraded or disrupted radio links and GPS accuracy. Taken together, these effects impact satellites and communications directly, driven by solar activity and particles, and include radiation damage and drag changes.

The other options are too narrow: space weather affects more than ground communications, the space environment, or astronaut safety alone.