Postby DFC » July 2nd, 2015, 3:38 pm
We ( Earth) rotate on our axis and while doing so, goes around the Sun due to being caught in the Sun's gravity.
This multiple movements makes our night sky unique because stars appear to be moving or growing apart.
Earth is spinning on its axiz, while it revolves around the sun.
The sun is located on the orion's arm of the milky way galaxy which is also spinning like a hurricane.
The milky way galaxy is part of a bigger galaxy cluster which is also moving.
All this movement , while the universe itself is rapidly expanding, or contracting- both theories seems plausible.
Our galaxy is the Milky Way galaxy and we are situated in the Orion's arm of the Milky way.