### Clue: Under Soviet scheme French also object in 21 (3,6)
### Answer: RED PLANET 
 ### Explanation: Definition: object in 21
  ET(French for the conjunction and,also) **placed below**(under, in a down clue) [RED(Soviet,communist) + PLAN(scheme)]. 
Answer: Nickname for the planet Mars, an object in space(answer to 21across)