Possible Clues:

• Sounds as if it's less lean in space
• There's a chance one may strike earth — possibly remote
• Streaker in space
• Glowing heavenly body
• Remote shape heading for earth?
• That needs space to sound comparatively beefy
• Sounds as if there's further flesh from a visitor from space
• Component of some showers
• One seen streaking
• Earth threat in some sci-fi films