Question

"Space junk" which is moving very fast is circling the earth. They are pieces from spacecraft and can reach speeds of $4.3$ to $5$ miles per second. What are these "spaces junks" called?

• A. Orbit debris
• B. Orbital debris
• C. Debris of spacecraft
• D. Both (A) and (C)

Answer 1

The correct option is B Orbital debris

• Orbital debris is "junk" that is circling Earth. It is pieces from spacecraft. Humans have been launching objects into space for more than 50 years. Most of those objects have fallen back to Earth.
• A piece of debris falls back to Earth about once a day. These objects either land or burn up in the atmosphere.
• Most objects that return to Earth end up in water, since it makes up 70 percent of Earth's surface. But many of the objects sent into space are still in orbit around Earth.