parallax
The apperent movement of the stars across the night sky is caused by the rotation of the earth.
retrograde motion
The device used for showing the movement of the stars and planets on a curved ceiling is called an orrery. This mechanical model demonstrates the relative positions and motions of celestial bodies in the solar system.
How bright a star looks in space.
West to east. This is also the direction of the Moon with respect to the stars. As seen from Earth, planets sometimes go from east to west and sometimes from west to east, but the west to east movement is the predominating movement - therefore that movement is called prograde, while east to west is called retrograde.
All stars can be used to tell which direction you are travelling in as the movement of the earth is in a consistant direction, allowing you to compare your movement with the direction that the stars are travelling in.
It's pretty easy. They move west at approximately 15 degrees per hour. Outside of that (which is a result of Earth's rotation, not an actual movement of the stars), most stars don't move appreciably over a human lifetime.
Its most apperent meaning is about the firefighters on 9/11 going into the towers
the actual movement of the stars through the backdrop of other stars is one answer
Parallax is the apparent difference in the position of a nearer object, compared to more distant background objects, when viewed from two different positions.
They are called Core Burning Stars the smallest one is OGLE-TR-122b.
movement of stars and planets