According to Density wave theory, catastrophes can be related to spiral arms in galaxy. Each time solar system entered into the spiral arms corresponds to impact events, respectively. The spiral arms would impose an i...According to Density wave theory, catastrophes can be related to spiral arms in galaxy. Each time solar system entered into the spiral arms corresponds to impact events, respectively. The spiral arms would impose an influence on Earth and the solar system.展开更多
文摘According to Density wave theory, catastrophes can be related to spiral arms in galaxy. Each time solar system entered into the spiral arms corresponds to impact events, respectively. The spiral arms would impose an influence on Earth and the solar system.
