what are the characteristics of earth that make life possible?
['20,000. light-years. 10,000. light-years. ... ', 'Our location is far from. MANY HAZARDS. The solar system is comfortably nestled in a safe harbor. between major spiral arms, and its nearly circular orbit helps. ... ', 'Our location is far from. MANY HAZARDS. The solar system is comfortably nestled in a safe harbor.']