Earth science and space station

How Can Dark Matter Cause Chaos On Earth Every 30 Million Years?

Our Galaxy is best understood as an enormous disc. Our solar system revolves around the circumference of the disc every 250 million years. But the path is not smooth, it’s wavy. The Earth passes through the mid-plane of the disc once every 30 million years. earth science examples earth science topics why is earth science important earth science book

An edge-on view of our Milky Way Galaxy shows its disk-like nature. NASA earth science examples earth science topics why is earth science important earth science book

I believe that the cycle of extinctions and impacts is related to times when the Sun and planets plunge through the crowded disc of our Galaxy. Normally, comets orbit the Sun at the edge of the solar system, very far from the Earth. But when the solar system passes through the crowded disc, the combined gravitational pull of visible stars, interstellar clouds and invisible dark matter disturbs the comets and sends some of them on alternate paths, sometimes crossing the Earth’s orbit, where they can collide with the planet. earth science examples earth science topics why is earth science important earth science book

33 earth science examples earth science topics why is earth science important earth science book

Geological events such as pulses of volcanic eruptions occur on that same 30-million-year schedule. D W Peterson, National Park ServiceCC BY earth science examples earth science topics why is earth science important earth science book

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