What is a major risk associated with debris from ASAT tests?

• A. It creates long-term hazards in low Earth orbit.
• B. It improves satellite performance due to fragmentation.
• C. It has no effect on other satellites.
• D. It reduces the risk of collisions.

Answer: (A)

The major risk is that debris from ASAT tests piles up in low Earth orbit and remains there for years, or even decades. When an ASAT test creates fragments, those pieces spread into similar orbits and travel at very high speeds. Even tiny fragments can cause serious damage to operational satellites, ground facilities, and human missions if they collide. Over time, the debris population grows, raising the likelihood of further collisions in a chain-reaction effect known as a debris cascade. That long-lasting presence of junk in the same orbital region is what makes it a long-term hazard.

The other statements don’t fit because fragmentation harms performance and safety rather than improving it, it does affect other satellites by increasing collision risk, and it does not reduce collision risk—in fact, it raises it.