Dark Matter Galaxy Disc 22: “Our Solar System’s Milky-Way Orbit Through Dark Matter Impacts Life on Earth”

http://www.dailygalaxy.com/my_weblog/2015/02/our-solar-systems-milky-way-orbit-through-dark-matter-impacts-life-on-earth.html

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The Galactic disc is the region of the Milky Way Galaxy where our solar system resides. It is crowded with stars and clouds of gas and dust, and also a concentration of elusive dark matter–small subatomic particles that can be detected only by their gravitational effects.

Previous studies have shown that Earth rotates around the disc-shaped Galaxy once every 250 million years. But the Earth’s path around the Galaxy is wavy, with the Sun and planets weaving through the crowded disc approximately every 30 million years.

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