9a Rocky objects found in space, starfish (9) ??????I?S
14a What lies beyond the earth's atmosphere (5,5) ?????,???C?
20a A short-lived outburst from the sun (5,5) ???A?,??A??
15d Shoddy, low-grade (5-4) ??I??_????
Apologies for lack of letters, but it's a stinker of a crossword this week :(